litellm/tests/benchmarks
rj-cairn d06b889d41
fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755)
* fix(vertex_ai): split Gemini SSE lines on CR/LF only so U+2028 in text keeps the stream

The Gemini and Vertex AI streaming path read the SSE body with httpx
iter_lines()/aiter_lines(). Those follow str.splitlines(), which also breaks
on U+0085, U+2028, U+2029, \x0b, \x0c and \x1c-\x1e. JSON leaves U+0085,
U+2028 and U+2029 unescaped inside strings, so a data: line whose text holds
one of them was cut in two. The tail is not a data: line and the head never
parses, and the accumulate-and-retry fallback then carries the unparsed
prefix forward, so every later event is appended to it and the stream ends
with no more content and no usage.

SSE lines end only at CRLF, LF or CR. The new iter_sse_lines/aiter_sse_lines
split decoded text on exactly those, treating a CR at the end of one chunk and
an LF at the start of the next as one break. The first request and every
long-decode hop now read through them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(streaming): keep merged think tags balanced and split shared SSE lines only on CR/LF

Close an open <think> block on the first content or tool-call delta and at stream end, reopen it when reasoning returns, and route the shared chat completions stream through the SSE line splitter so U+2028 and U+2029 inside JSON no longer drop chunks.

* fix(streaming): exact-match the SSE [DONE] marker in BaseModelResponseIterator

* fix(streaming): split every SSE reader on CR/LF only and keep the logged think block closed

Switch the remaining httpx stream readers (Anthropic chat, Google GenAI,
Interactions, Codestral, openai_like, Predibase, LangGraph, Vertex Agent
Engine, A2A providers, Azure AI agents, sandboxes, the A2A endpoint, and
others) from iter_lines/aiter_lines to iter_sse_lines/aiter_sse_lines, so a
raw U+2028 or U+2029 inside a JSON string no longer splits an event.

Keep the chunk that closes a think block in the logged and cached response
when a stream ends without a finish_reason, close the block before a legacy
function_call, and make sync Codestral FIM streaming send stream=true and use
the text-completion-codestral stream parser.

Test fakes that only mocked iter_lines now stream real httpx bytes and
assert the content they feed in.

* fix(streaming): split buffered SSE parsers only on CR and LF, shard the codestral tests

Buffered SSE and JSONL parsers used str.splitlines(), which also breaks on
U+2028, U+2029 and U+0085 that JSON allows raw inside strings. They now use
split_sse_lines from sse_lines.py, which also gains a str.split fast path.
Adds tests/unit/llms/codestral to the unit workflow shard.

* fix(streaming): keep U+2028 in restamped Anthropic frames and fold CRLF before splitting SSE lines

* test: type the new stream tests, drop a comment, and benchmark the SSE line splitter

* test: type the iterator class parameters in the line-separator stream tests

* fix(responses): stream tool call arguments opened in a text chunk

* fix(responses): hold a tool call that shares a chunk with text until the text ends

* test: type the a2a SSE handler helper and the sandbox fake responses

---------

Co-authored-by: Tim Vink <vinktim@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
Co-authored-by: michelligabriele <gabriele.michelli@icloud.com>
2026-10-28 17:00:29 -07:00
..
__init__.py Add CodSpeed performance benchmarks (#23676) 2026-03-14 18:44:36 -07:00
conftest.py feat(tokenizer): preserve Python defaults with opt-in Rust dispatch (#42174) 2026-09-22 04:41:11 +00:00
test_a2a_benchmarks.py test(benchmarks): add CodSpeed benchmarks for inference, MCP and A2A hot paths (#31716) 2026-06-30 10:27:12 -07:00
test_benchmarks.py refactor: expose core private helpers under public names (#44871) 2026-10-07 00:05:27 +00:00
test_extraction_guardrail_benchmarks.py feat(extraction): add /v1/extraction with Cloudflare Clairic support (#47473) 2026-10-20 15:51:45 -07:00
test_inference_benchmarks.py test(benchmarks): add CodSpeed benchmarks for inference, MCP and A2A hot paths (#31716) 2026-06-30 10:27:12 -07:00
test_mcp_benchmarks.py refactor(mcp): drop the experimental label from the MCP server and client paths (#48513) 2026-10-27 17:47:50 +00:00
test_prompt_template_benchmarks.py fix(anthropic): keep trailing user messages with None or empty list content (#41397) 2026-10-16 07:41:05 +00:00
test_responses_compaction_benchmarks.py fix(responses)!: round-trip Anthropic compaction blocks as compaction items (#46754) 2026-10-21 08:50:19 +00:00
test_sse_lines_benchmarks.py fix(streaming): keep merged think tags balanced and split SSE lines only on CR/LF (#48755) 2026-10-28 17:00:29 -07:00