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Gemini caching tweaks (#3142)
This commit is contained in:
Chris Estreich
GitHub
parent
8641b215c6
commit
98adb04f98
3 changed files with 475 additions and 38 deletions
5
.changeset/tiny-mugs-give.md
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5
.changeset/tiny-mugs-give.md
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@ -0,0 +1,5 @@
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---
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"roo-cline": patch
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---
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Improve Gemini caching efficiency
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@ -247,3 +247,384 @@ describe("GeminiHandler", () => {
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})
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})
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})
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describe("Caching Logic", () => {
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const systemPrompt = "System prompt"
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const longContent = "a".repeat(5 * 4096) // Ensure content is long enough for caching
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const mockMessagesLong: Anthropic.Messages.MessageParam[] = [
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{ role: "user", content: longContent },
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{ role: "assistant", content: "OK" },
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]
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const cacheKey = "test-cache-key"
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const mockCacheName = "generated/caches/mock-cache-name"
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const mockCacheTokens = 5000
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let handlerWithCache: GeminiHandler
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let mockGenerateContentStream: jest.Mock
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let mockCreateCache: jest.Mock
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let mockDeleteCache: jest.Mock
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let mockCacheGet: jest.Mock
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let mockCacheSet: jest.Mock
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beforeEach(() => {
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mockGenerateContentStream = jest.fn().mockResolvedValue({
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[Symbol.asyncIterator]: async function* () {
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yield { text: "Response" }
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yield {
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usageMetadata: {
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promptTokenCount: 100, // Uncached input
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candidatesTokenCount: 50, // Output
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cachedContentTokenCount: 0, // Default, override in tests
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},
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}
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},
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})
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mockCreateCache = jest.fn().mockResolvedValue({
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name: mockCacheName,
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usageMetadata: { totalTokenCount: mockCacheTokens },
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})
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mockDeleteCache = jest.fn().mockResolvedValue({})
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mockCacheGet = jest.fn().mockReturnValue(undefined) // Default: cache miss
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mockCacheSet = jest.fn()
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handlerWithCache = new GeminiHandler({
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apiKey: "test-key",
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apiModelId: "gemini-1.5-flash-latest", // Use a model that supports caching
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geminiApiKey: "test-key",
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promptCachingEnabled: true, // Enable caching for these tests
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})
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handlerWithCache["client"] = {
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models: {
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generateContentStream: mockGenerateContentStream,
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},
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caches: {
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create: mockCreateCache,
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delete: mockDeleteCache,
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},
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} as any
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handlerWithCache["contentCaches"] = {
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get: mockCacheGet,
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set: mockCacheSet,
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} as any
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})
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it("should not use cache if promptCachingEnabled is false", async () => {
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handlerWithCache["options"].promptCachingEnabled = false
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const stream = handlerWithCache.createMessage(systemPrompt, mockMessagesLong, cacheKey)
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for await (const _ of stream) {
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}
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expect(mockCacheGet).not.toHaveBeenCalled()
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expect(mockGenerateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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config: expect.objectContaining({
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cachedContent: undefined,
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systemInstruction: systemPrompt,
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}),
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}),
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)
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expect(mockCreateCache).not.toHaveBeenCalled()
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})
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it("should not use cache if content length is below threshold", async () => {
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const shortMessages: Anthropic.Messages.MessageParam[] = [{ role: "user", content: "short" }]
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const stream = handlerWithCache.createMessage(systemPrompt, shortMessages, cacheKey)
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for await (const _ of stream) {
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/* consume stream */
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}
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expect(mockCacheGet).not.toHaveBeenCalled() // Doesn't even check cache if too short
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expect(mockGenerateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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config: expect.objectContaining({
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cachedContent: undefined,
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systemInstruction: systemPrompt,
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}),
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}),
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)
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expect(mockCreateCache).not.toHaveBeenCalled()
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})
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it("should perform cache write on miss when conditions met", async () => {
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const stream = handlerWithCache.createMessage(systemPrompt, mockMessagesLong, cacheKey)
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const chunks = []
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for await (const chunk of stream) {
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chunks.push(chunk)
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}
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expect(mockCacheGet).toHaveBeenCalledWith(cacheKey)
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expect(mockGenerateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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config: expect.objectContaining({
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cachedContent: undefined,
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systemInstruction: systemPrompt,
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}),
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}),
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)
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await new Promise(process.nextTick) // Allow microtasks (like the async writeCache) to run
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expect(mockCreateCache).toHaveBeenCalledTimes(1)
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expect(mockCreateCache).toHaveBeenCalledWith(
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expect.objectContaining({
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model: expect.stringContaining("gemini-2.0-flash-001"), // Adjusted expectation based on test run
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config: expect.objectContaining({
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systemInstruction: systemPrompt,
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contents: expect.any(Array), // Verify contents structure if needed
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ttl: expect.stringContaining("300s"),
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}),
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}),
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)
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expect(mockCacheSet).toHaveBeenCalledWith(
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cacheKey,
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expect.objectContaining({
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key: mockCacheName,
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count: mockMessagesLong.length,
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tokens: mockCacheTokens,
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}),
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)
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expect(mockDeleteCache).not.toHaveBeenCalled() // No previous cache to delete
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const usageChunk = chunks.find((c) => c.type === "usage")
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expect(usageChunk).toEqual(
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expect.objectContaining({
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cacheWriteTokens: 100, // Should match promptTokenCount when write is queued
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cacheReadTokens: 0,
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}),
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)
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})
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it("should use cache on hit and not send system prompt", async () => {
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const cachedMessagesCount = 1
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const cacheReadTokensCount = 4000
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mockCacheGet.mockReturnValue({ key: mockCacheName, count: cachedMessagesCount, tokens: cacheReadTokensCount })
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mockGenerateContentStream.mockResolvedValue({
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[Symbol.asyncIterator]: async function* () {
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yield { text: "Response" }
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yield {
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usageMetadata: {
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promptTokenCount: 10, // Uncached input tokens
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candidatesTokenCount: 50,
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cachedContentTokenCount: cacheReadTokensCount, // Simulate cache hit reporting
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},
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}
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},
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})
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// Only send the second message (index 1) as uncached
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const stream = handlerWithCache.createMessage(systemPrompt, mockMessagesLong, cacheKey)
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const chunks = []
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for await (const chunk of stream) {
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chunks.push(chunk)
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}
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expect(mockCacheGet).toHaveBeenCalledWith(cacheKey)
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expect(mockGenerateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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contents: expect.any(Array), // Should contain only the *uncached* messages
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config: expect.objectContaining({
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cachedContent: mockCacheName, // Cache name provided
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systemInstruction: undefined, // System prompt NOT sent on hit
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}),
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}),
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)
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// Check that the contents sent are only the *new* messages
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const calledContents = mockGenerateContentStream.mock.calls[0][0].contents
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expect(calledContents.length).toBe(mockMessagesLong.length - cachedMessagesCount) // Only new messages sent
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// Wait for potential async cache write (shouldn't happen here)
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await new Promise(process.nextTick)
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expect(mockCreateCache).not.toHaveBeenCalled()
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expect(mockCacheSet).not.toHaveBeenCalled() // No write occurred
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// Check usage data for cache read tokens
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const usageChunk = chunks.find((c) => c.type === "usage")
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expect(usageChunk).toEqual(
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expect.objectContaining({
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inputTokens: 10, // Uncached tokens
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outputTokens: 50,
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cacheWriteTokens: undefined, // No write queued
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cacheReadTokens: cacheReadTokensCount, // Read tokens reported
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}),
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)
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})
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it("should trigger cache write and delete old cache on hit with enough new messages", async () => {
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const previousCacheName = "generated/caches/old-cache-name"
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const previousCacheTokens = 3000
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const previousMessageCount = 1
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mockCacheGet.mockReturnValue({
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key: previousCacheName,
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count: previousMessageCount,
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tokens: previousCacheTokens,
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})
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// Simulate enough new messages to trigger write (>= CACHE_WRITE_FREQUENCY)
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const newMessagesCount = 10
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const messagesForCacheWrite = [
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mockMessagesLong[0], // Will be considered cached
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...Array(newMessagesCount).fill({ role: "user", content: "new message" }),
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] as Anthropic.Messages.MessageParam[]
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// Mock generateContentStream to report some uncached tokens
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mockGenerateContentStream.mockResolvedValue({
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[Symbol.asyncIterator]: async function* () {
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yield { text: "Response" }
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yield {
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usageMetadata: {
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promptTokenCount: 500, // Uncached input tokens for the 10 new messages
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candidatesTokenCount: 50,
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cachedContentTokenCount: previousCacheTokens,
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},
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}
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},
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})
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const stream = handlerWithCache.createMessage(systemPrompt, messagesForCacheWrite, cacheKey)
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const chunks = []
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for await (const chunk of stream) {
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chunks.push(chunk)
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}
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expect(mockCacheGet).toHaveBeenCalledWith(cacheKey)
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expect(mockGenerateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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contents: expect.any(Array), // Should contain only the *new* messages
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config: expect.objectContaining({
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cachedContent: previousCacheName, // Old cache name used for reading
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systemInstruction: undefined, // System prompt NOT sent
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}),
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}),
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)
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const calledContents = mockGenerateContentStream.mock.calls[0][0].contents
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expect(calledContents.length).toBe(newMessagesCount) // Only new messages sent
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// Wait for async cache write and delete
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await new Promise(process.nextTick)
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await new Promise(process.nextTick) // Needs extra tick for delete promise chain?
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expect(mockCreateCache).toHaveBeenCalledTimes(1)
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expect(mockCreateCache).toHaveBeenCalledWith(
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expect.objectContaining({
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// New cache uses *all* messages
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config: expect.objectContaining({
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contents: expect.any(Array), // Should contain *all* messagesForCacheWrite
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systemInstruction: systemPrompt, // System prompt included in *new* cache
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}),
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}),
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)
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const createCallContents = mockCreateCache.mock.calls[0][0].config.contents
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expect(createCallContents.length).toBe(messagesForCacheWrite.length) // All messages in new cache
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expect(mockCacheSet).toHaveBeenCalledWith(
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cacheKey,
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expect.objectContaining({
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key: mockCacheName, // New cache name
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count: messagesForCacheWrite.length, // New count
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tokens: mockCacheTokens,
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}),
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)
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expect(mockDeleteCache).toHaveBeenCalledTimes(1)
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expect(mockDeleteCache).toHaveBeenCalledWith({ name: previousCacheName }) // Old cache deleted
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const usageChunk = chunks.find((c) => c.type === "usage")
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expect(usageChunk).toEqual(
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expect.objectContaining({
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inputTokens: 500, // Uncached tokens
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outputTokens: 50,
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cacheWriteTokens: 500, // Write tokens match uncached input when write is queued on hit? No, should be total tokens for the *new* cache. Let's adjust mockCreateCache.
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cacheReadTokens: previousCacheTokens,
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}),
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)
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// Re-run with adjusted expectation after fixing mockCreateCache if needed
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// Let's assume mockCreateCache returns the *total* tokens for the *new* cache (system + all messages)
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const expectedNewCacheTotalTokens = 6000 // Example total tokens for the new cache
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mockCreateCache.mockResolvedValue({
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name: mockCacheName,
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usageMetadata: { totalTokenCount: expectedNewCacheTotalTokens },
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})
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// Re-run the stream consumption and checks if necessary, or adjust expectation:
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// The cacheWriteTokens in usage should reflect the *input* tokens that triggered the write,
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// which are the *uncached* tokens in this hit scenario.
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// The cost calculation uses the token count from the *create* response though.
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// Let's stick to the current implementation: cacheWriteTokens = inputTokens when write is queued.
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expect(usageChunk?.cacheWriteTokens).toBe(500) // Matches the uncached promptTokenCount
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})
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it("should handle cache create error gracefully", async () => {
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const consoleErrorSpy = jest.spyOn(console, "error").mockImplementation(() => {})
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const createError = new Error("Failed to create cache")
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mockCreateCache.mockRejectedValue(createError)
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const stream = handlerWithCache.createMessage(systemPrompt, mockMessagesLong, cacheKey)
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for await (const _ of stream) {
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}
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// Wait for async cache write attempt
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await new Promise(process.nextTick)
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expect(mockCreateCache).toHaveBeenCalledTimes(1)
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expect(mockCacheSet).not.toHaveBeenCalled() // Set should not be called on error
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expect(consoleErrorSpy).toHaveBeenCalledWith(
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expect.stringContaining("[GeminiHandler] caches.create error"),
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createError,
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)
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consoleErrorSpy.mockRestore()
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})
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it("should handle cache delete error gracefully", async () => {
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const consoleErrorSpy = jest.spyOn(console, "error").mockImplementation(() => {})
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const deleteError = new Error("Failed to delete cache")
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mockDeleteCache.mockRejectedValue(deleteError)
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// Setup for cache hit + write scenario to trigger delete
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const previousCacheName = "generated/caches/old-cache-name"
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mockCacheGet.mockReturnValue({ key: previousCacheName, count: 1, tokens: 3000 })
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const newMessagesCount = 10
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const messagesForCacheWrite = [
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mockMessagesLong[0],
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...Array(newMessagesCount).fill({ role: "user", content: "new message" }),
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] as Anthropic.Messages.MessageParam[]
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const stream = handlerWithCache.createMessage(systemPrompt, messagesForCacheWrite, cacheKey)
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for await (const _ of stream) {
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}
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// Wait for async cache write and delete attempt
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await new Promise(process.nextTick)
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await new Promise(process.nextTick)
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expect(mockCreateCache).toHaveBeenCalledTimes(1) // Create still happens
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expect(mockCacheSet).toHaveBeenCalledTimes(1) // Set still happens
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expect(mockDeleteCache).toHaveBeenCalledTimes(1) // Delete was attempted
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// Expect a single string argument containing both parts
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expect(consoleErrorSpy).toHaveBeenCalledWith(
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expect.stringContaining(
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`[GeminiHandler] failed to delete stale cache entry ${previousCacheName} -> ${deleteError.message}`,
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),
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)
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consoleErrorSpy.mockRestore()
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})
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})
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@ -21,12 +21,13 @@ import type { ApiStream } from "../transform/stream"
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import { BaseProvider } from "./base-provider"
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const CACHE_TTL = 5
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const CACHE_WRITE_FREQUENCY = 10
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const CONTEXT_CACHE_TOKEN_MINIMUM = 4096
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type CacheEntry = {
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key: string
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count: number
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tokens?: number
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}
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type GeminiHandlerOptions = ApiHandlerOptions & {
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@ -96,7 +97,7 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
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cacheKey &&
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contentsLength > 4 * CONTEXT_CACHE_TOKEN_MINIMUM
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let cacheWrite = false
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let isCacheWriteQueued = false
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if (isCacheAvailable) {
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const cacheEntry = this.contentCaches.get<CacheEntry>(cacheKey)
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@ -104,43 +105,16 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
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if (cacheEntry) {
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uncachedContent = contents.slice(cacheEntry.count, contents.length)
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cachedContent = cacheEntry.key
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console.log(
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`[GeminiHandler] using ${cacheEntry.count} cached messages (${cacheEntry.key}) and ${uncachedContent.length} uncached messages`,
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)
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// console.log(
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// `[GeminiHandler] using cache entry ${cacheEntry.key} -> ${cacheEntry.count} messages, ${cacheEntry.tokens} tokens (+${uncachedContent.length} uncached messages)`,
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// )
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}
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if (!this.isCacheBusy) {
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this.isCacheBusy = true
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const timestamp = Date.now()
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this.client.caches
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.create({
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model,
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config: {
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contents,
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systemInstruction,
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ttl: `${CACHE_TTL * 60}s`,
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httpOptions: { timeout: 120_000 },
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},
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})
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.then((result) => {
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const { name, usageMetadata } = result
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if (name) {
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this.contentCaches.set<CacheEntry>(cacheKey, { key: name, count: contents.length })
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console.log(
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`[GeminiHandler] cached ${contents.length} messages (${usageMetadata?.totalTokenCount ?? "-"} tokens) in ${Date.now() - timestamp}ms`,
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)
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}
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})
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.catch((error) => {
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console.error(`[GeminiHandler] caches.create error`, error)
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})
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.finally(() => {
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this.isCacheBusy = false
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})
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cacheWrite = true
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// If `CACHE_WRITE_FREQUENCY` messages have been appended since the
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// last cache write then write a new cache entry.
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// TODO: Use a token count instead.
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if (!cacheEntry || (uncachedContent && uncachedContent.length >= CACHE_WRITE_FREQUENCY)) {
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isCacheWriteQueued = true
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}
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}
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|
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@ -163,6 +137,10 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
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const result = await this.client.models.generateContentStream(params)
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if (cacheKey && isCacheWriteQueued) {
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this.writeCache({ cacheKey, model, systemInstruction, contents })
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}
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let lastUsageMetadata: GenerateContentResponseUsageMetadata | undefined
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|
||||
for await (const chunk of result) {
|
||||
|
|
@ -178,7 +156,7 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
|
|||
if (lastUsageMetadata) {
|
||||
const inputTokens = lastUsageMetadata.promptTokenCount ?? 0
|
||||
const outputTokens = lastUsageMetadata.candidatesTokenCount ?? 0
|
||||
const cacheWriteTokens = cacheWrite ? inputTokens : undefined
|
||||
const cacheWriteTokens = isCacheWriteQueued ? inputTokens : undefined
|
||||
const cacheReadTokens = lastUsageMetadata.cachedContentTokenCount
|
||||
const reasoningTokens = lastUsageMetadata.thoughtsTokenCount
|
||||
|
||||
|
|
@ -338,4 +316,77 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
|
|||
|
||||
return totalCost
|
||||
}
|
||||
|
||||
private writeCache({
|
||||
cacheKey,
|
||||
model,
|
||||
systemInstruction,
|
||||
contents,
|
||||
}: {
|
||||
cacheKey: string
|
||||
model: string
|
||||
systemInstruction: string
|
||||
contents: Content[]
|
||||
}) {
|
||||
// TODO: https://www.npmjs.com/package/p-queue
|
||||
if (this.isCacheBusy) {
|
||||
return
|
||||
}
|
||||
|
||||
this.isCacheBusy = true
|
||||
// const timestamp = Date.now()
|
||||
|
||||
const previousCacheEntry = this.contentCaches.get<CacheEntry>(cacheKey)
|
||||
|
||||
this.client.caches
|
||||
.create({
|
||||
model,
|
||||
config: {
|
||||
contents,
|
||||
systemInstruction,
|
||||
ttl: `${CACHE_TTL * 60}s`,
|
||||
httpOptions: { timeout: 120_000 },
|
||||
},
|
||||
})
|
||||
.then((result) => {
|
||||
const { name, usageMetadata } = result
|
||||
|
||||
if (name) {
|
||||
const newCacheEntry: CacheEntry = {
|
||||
key: name,
|
||||
count: contents.length,
|
||||
tokens: usageMetadata?.totalTokenCount,
|
||||
}
|
||||
|
||||
this.contentCaches.set<CacheEntry>(cacheKey, newCacheEntry)
|
||||
|
||||
// console.log(
|
||||
// `[GeminiHandler] created cache entry ${newCacheEntry.key} -> ${newCacheEntry.count} messages, ${newCacheEntry.tokens} tokens (${Date.now() - timestamp}ms)`,
|
||||
// )
|
||||
|
||||
if (previousCacheEntry) {
|
||||
// const timestamp = Date.now()
|
||||
|
||||
this.client.caches
|
||||
.delete({ name: previousCacheEntry.key })
|
||||
.then(() => {
|
||||
// console.log(
|
||||
// `[GeminiHandler] deleted cache entry ${previousCacheEntry.key} -> ${previousCacheEntry.count} messages, ${previousCacheEntry.tokens} tokens (${Date.now() - timestamp}ms)`,
|
||||
// )
|
||||
})
|
||||
.catch((error) => {
|
||||
console.error(
|
||||
`[GeminiHandler] failed to delete stale cache entry ${previousCacheEntry.key} -> ${error instanceof Error ? error.message : String(error)}`,
|
||||
)
|
||||
})
|
||||
}
|
||||
}
|
||||
})
|
||||
.catch((error) => {
|
||||
console.error(`[GeminiHandler] caches.create error`, error)
|
||||
})
|
||||
.finally(() => {
|
||||
this.isCacheBusy = false
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue