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diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index db0bb735bab..df52e354c5c 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -948,9 +948,33 @@ async def proxy_startup_event(app: FastAPI):  # noqa: PLR0915
     ## Initialize shared aiohttp session for connection reuse
     shared_aiohttp_session = await _initialize_shared_aiohttp_session()
 
+    ## Initialize Rust sidecar client (optional, for high-perf forwarding)
+    _use_sidecar = os.environ.get("USE_SIDECAR", "").lower() == "true" or general_settings.get("use_sidecar", False)
+    if _use_sidecar:
+        from litellm.proxy.sidecar_client import init_sidecar_client
+
+        _sidecar_port = int(os.environ.get("SIDECAR_PORT", general_settings.get("sidecar_port", 8787)))
+        _sidecar_binary = os.environ.get("SIDECAR_BINARY", general_settings.get("sidecar_binary", ""))
+        await init_sidecar_client(
+            port=_sidecar_port,
+            binary=_sidecar_binary or None,
+            auto_start=bool(_sidecar_binary),
+        )
+
     # End of startup event
     yield
 
+    # Shutdown event - close sidecar client
+    try:
+        from litellm.proxy.sidecar_client import get_sidecar_client
+
+        _sc = get_sidecar_client()
+        if _sc is not None:
+            await _sc.close()
+            verbose_proxy_logger.info("Sidecar client closed")
+    except Exception:
+        pass
+
     # Shutdown event - close shared aiohttp session
     if shared_aiohttp_session is not None:
         try:
diff --git a/litellm/proxy/route_llm_request.py b/litellm/proxy/route_llm_request.py
index 1b791980af3..555f25652da 100644
--- a/litellm/proxy/route_llm_request.py
+++ b/litellm/proxy/route_llm_request.py
@@ -143,6 +143,38 @@ def add_shared_session_to_data(data: dict) -> None:
         pass
 
 
+async def _try_sidecar_route(
+    data: dict,
+    llm_router: Optional[LitellmRouter],
+    route_type: str,
+) -> "Any | None":
+    """
+    Attempt to route an acompletion request through the Rust sidecar.
+    Returns None if the sidecar is not available or not applicable.
+    """
+    if route_type != "acompletion":
+        return None
+
+    from litellm.proxy.sidecar_handler import is_sidecar_enabled, sidecar_acompletion
+
+    if not is_sidecar_enabled():
+        return None
+    if llm_router is None:
+        return None
+
+    try:
+        deployment = await llm_router.async_get_available_deployment(
+            model=data.get("model", ""),
+            messages=data.get("messages"),
+            request_kwargs=data,
+        )
+        if deployment is None:
+            return None
+        return await sidecar_acompletion(data, deployment)
+    except Exception:
+        return None
+
+
 async def route_request(  # noqa: PLR0915 - Complex routing function, refactoring tracked separately
     data: dict,
     llm_router: Optional[LitellmRouter],
@@ -221,6 +253,14 @@ async def route_request(  # noqa: PLR0915 - Complex routing function, refactorin
     """
     Common helper to route the request
     """
+    # Fast path: try Rust sidecar for acompletion requests
+    sidecar_result = await _try_sidecar_route(data, llm_router, route_type)
+    if sidecar_result is not None:
+        # Wrap in a coroutine to match the expected interface (result goes into asyncio.gather)
+        async def _resolved():
+            return sidecar_result
+        return _resolved()
+
     add_shared_session_to_data(data)
 
     team_id = get_team_id_from_data(data)
diff --git a/litellm/proxy/sidecar_client.py b/litellm/proxy/sidecar_client.py
new file mode 100644
index 00000000000..eeeff90cf22
--- /dev/null
+++ b/litellm/proxy/sidecar_client.py
@@ -0,0 +1,172 @@
+"""
+LiteLLM Rust Sidecar Client
+
+Forwards HTTP requests through the Rust sidecar for improved performance
+under high concurrency. The sidecar provides:
+- Pre-warmed connection pools (no per-request SSL/TCP overhead)
+- Lock-free metrics aggregation  
+- Zero GIL contention for I/O forwarding
+
+The sidecar is optional — if unavailable, requests fall back to the
+normal Python HTTP path.
+"""
+
+import asyncio
+import json
+import os
+import subprocess
+from typing import Optional, Union
+
+import aiohttp
+
+from litellm._logging import verbose_proxy_logger
+
+
+class SidecarClient:
+    """Client for communicating with the Rust sidecar process."""
+
+    def __init__(
+        self,
+        sidecar_port: int = 8787,
+        sidecar_binary: Optional[str] = None,
+        auto_start: bool = False,
+    ):
+        self.sidecar_port = sidecar_port
+        self.sidecar_url = f"http://127.0.0.1:{sidecar_port}"
+        self.sidecar_binary = sidecar_binary
+        self.auto_start = auto_start
+        self._session: Optional[aiohttp.ClientSession] = None
+        self._process: Optional[subprocess.Popen] = None
+        self._healthy = False
+
+    async def initialize(self):
+        """Initialize the sidecar client and optionally start the sidecar process."""
+        connector = aiohttp.TCPConnector(
+            limit=0,
+            ttl_dns_cache=300,
+            use_dns_cache=True,
+            keepalive_timeout=90,
+            enable_cleanup_closed=True,
+        )
+        self._session = aiohttp.ClientSession(
+            connector=connector,
+            timeout=aiohttp.ClientTimeout(total=None, connect=5),
+        )
+
+        if self.auto_start and self.sidecar_binary:
+            await self._start_sidecar()
+
+        self._healthy = await self._check_health()
+        if self._healthy:
+            verbose_proxy_logger.info(
+                f"Sidecar client connected to {self.sidecar_url}"
+            )
+        else:
+            verbose_proxy_logger.warning(
+                f"Sidecar not available at {self.sidecar_url}, will use fallback"
+            )
+
+    async def _start_sidecar(self):
+        """Start the sidecar binary as a subprocess."""
+        if self.sidecar_binary and os.path.isfile(self.sidecar_binary):
+            env = os.environ.copy()
+            env["SIDECAR_PORT"] = str(self.sidecar_port)
+            self._process = subprocess.Popen(
+                [self.sidecar_binary],
+                env=env,
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+            for _ in range(50):
+                await asyncio.sleep(0.1)
+                if await self._check_health():
+                    return
+            verbose_proxy_logger.error("Sidecar failed to start within 5 seconds")
+
+    async def _check_health(self) -> bool:
+        """Check if the sidecar is healthy."""
+        if self._session is None:
+            return False
+        try:
+            async with self._session.get(
+                f"{self.sidecar_url}/health", timeout=aiohttp.ClientTimeout(total=2)
+            ) as resp:
+                return resp.status == 200
+        except Exception:
+            return False
+
+    @property
+    def is_healthy(self) -> bool:
+        return self._healthy
+
+    async def forward_request(
+        self,
+        provider_url: str,
+        api_key: str,
+        request_body: Union[dict, str, bytes],
+        path: str = "/v1/chat/completions",
+        timeout: int = 300,
+        stream: bool = False,
+    ) -> aiohttp.ClientResponse:
+        """Forward a request through the sidecar to the provider."""
+        if self._session is None:
+            raise RuntimeError("SidecarClient not initialized")
+
+        headers = {
+            "X-LiteLLM-Provider-URL": provider_url,
+            "X-LiteLLM-API-Key": api_key,
+            "X-LiteLLM-Timeout": str(timeout),
+            "X-LiteLLM-Stream": "true" if stream else "false",
+            "X-LiteLLM-Path": path,
+            "Content-Type": "application/json",
+        }
+
+        if isinstance(request_body, dict):
+            body = json.dumps(request_body).encode()
+        elif isinstance(request_body, str):
+            body = request_body.encode()
+        else:
+            body = request_body
+
+        resp = await self._session.post(
+            f"{self.sidecar_url}/forward",
+            data=body,
+            headers=headers,
+        )
+        return resp
+
+    async def close(self):
+        """Shut down the sidecar client and optionally the sidecar process."""
+        if self._session:
+            await self._session.close()
+            self._session = None
+        if self._process:
+            self._process.terminate()
+            self._process.wait(timeout=5)
+            self._process = None
+        self._healthy = False
+
+
+# Global sidecar client instance
+_sidecar_client: Optional[SidecarClient] = None
+
+
+def get_sidecar_client() -> Optional[SidecarClient]:
+    """Get the global sidecar client instance."""
+    return _sidecar_client
+
+
+async def init_sidecar_client(
+    port: int = 8787,
+    binary: Optional[str] = None,
+    auto_start: bool = False,
+) -> SidecarClient:
+    """Initialize the global sidecar client."""
+    global _sidecar_client
+    _sidecar_client = SidecarClient(
+        sidecar_port=port,
+        sidecar_binary=binary,
+        auto_start=auto_start,
+    )
+    await _sidecar_client.initialize()
+    return _sidecar_client
diff --git a/litellm/proxy/sidecar_handler.py b/litellm/proxy/sidecar_handler.py
new file mode 100644
index 00000000000..41fd89ae0bf
--- /dev/null
+++ b/litellm/proxy/sidecar_handler.py
@@ -0,0 +1,119 @@
+"""
+Sidecar request handler.
+
+Translates between LiteLLM's internal data format and the sidecar's
+HTTP forwarding protocol. Returns ModelResponse objects compatible
+with the rest of the proxy pipeline.
+"""
+
+import json
+from typing import Optional
+
+from litellm.proxy.sidecar_client import get_sidecar_client
+from litellm.types.utils import ModelResponse
+
+
+def _extract_provider_info(data: dict, deployment: Optional[dict] = None) -> dict:
+    """Extract provider URL, API key, and other forwarding metadata from request data."""
+    info = {
+        "api_base": "",
+        "api_key": "",
+        "timeout": 300,
+        "stream": False,
+        "model": "",
+    }
+
+    if deployment:
+        litellm_params = deployment.get("litellm_params", {})
+        info["api_base"] = litellm_params.get("api_base", "")
+        info["api_key"] = litellm_params.get("api_key", "")
+        info["timeout"] = litellm_params.get("timeout", 300)
+        info["model"] = litellm_params.get("model", "")
+
+    # Override with request-level data
+    if "api_base" in data:
+        info["api_base"] = data["api_base"]
+    if "api_key" in data:
+        info["api_key"] = data["api_key"]
+    if "timeout" in data:
+        info["timeout"] = data["timeout"]
+    if "stream" in data:
+        info["stream"] = data["stream"]
+    if "model" in data:
+        info["model"] = data["model"]
+
+    return info
+
+
+async def sidecar_acompletion(data: dict, deployment: dict) -> ModelResponse:
+    """
+    Forward a chat completion request through the sidecar.
+
+    Returns a ModelResponse compatible with litellm's response format.
+    """
+    client = get_sidecar_client()
+    if client is None or not client.is_healthy:
+        raise RuntimeError("Sidecar not available")
+
+    provider_info = _extract_provider_info(data, deployment)
+
+    # Build the request body (what the provider expects)
+    request_body = {
+        "model": provider_info["model"].split("/", 1)[-1]
+        if "/" in provider_info["model"]
+        else provider_info["model"],
+        "messages": data.get("messages", []),
+    }
+
+    # Forward optional params
+    for key in [
+        "max_tokens",
+        "temperature",
+        "top_p",
+        "n",
+        "stop",
+        "presence_penalty",
+        "frequency_penalty",
+        "logit_bias",
+        "user",
+        "response_format",
+        "seed",
+        "tools",
+        "tool_choice",
+        "stream",
+    ]:
+        if key in data and data[key] is not None:
+            request_body[key] = data[key]
+
+    timeout = provider_info["timeout"]
+    if isinstance(timeout, (int, float)):
+        timeout = int(timeout)
+    else:
+        timeout = 300
+
+    resp = await client.forward_request(
+        provider_url=provider_info["api_base"],
+        api_key=provider_info["api_key"],
+        request_body=request_body,
+        path="/v1/chat/completions",
+        timeout=timeout,
+        stream=False,
+    )
+
+    resp_body = await resp.read()
+    resp_json = json.loads(resp_body)
+
+    if resp.status != 200:
+        raise Exception(
+            f"Sidecar forwarding failed with status {resp.status}: {resp_json}"
+        )
+
+    # Convert to ModelResponse
+    model_response = ModelResponse(**resp_json)
+    return model_response
+
+
+def is_sidecar_enabled() -> bool:
+    """Check if the sidecar is enabled and healthy."""
+    client = get_sidecar_client()
+    return client is not None and client.is_healthy
diff --git a/tests/load_tests/compare_results.py b/tests/load_tests/compare_results.py
new file mode 100644
index 00000000000..72f3f2ea6cf
--- /dev/null
+++ b/tests/load_tests/compare_results.py
@@ -0,0 +1,89 @@
+"""Compare baseline vs sidecar locust load test results."""
+import csv
+import sys
+import os
+
+
+def parse_stats_csv(filepath):
+    """Parse a locust stats CSV file."""
+    if not os.path.exists(filepath):
+        print(f"File not found: {filepath}")
+        return None
+
+    with open(filepath) as f:
+        reader = csv.DictReader(f)
+        for row in reader:
+            if row.get("Name") == "Aggregated":
+                return {
+                    "requests": int(row.get("Request Count", 0)),
+                    "failures": int(row.get("Failure Count", 0)),
+                    "median": float(row.get("Median Response Time", 0)),
+                    "avg": float(row.get("Average Response Time", 0)),
+                    "min": float(row.get("Min Response Time", 0)),
+                    "max": float(row.get("Max Response Time", 0)),
+                    "p50": float(row.get("50%", 0)),
+                    "p66": float(row.get("66%", 0)),
+                    "p75": float(row.get("75%", 0)),
+                    "p80": float(row.get("80%", 0)),
+                    "p90": float(row.get("90%", 0)),
+                    "p95": float(row.get("95%", 0)),
+                    "p98": float(row.get("98%", 0)),
+                    "p99": float(row.get("99%", 0)),
+                    "p999": float(row.get("99.9%", 0)),
+                    "p9999": float(row.get("99.99%", 0)),
+                    "rps": float(row.get("Requests/s", 0)),
+                }
+    return None
+
+
+def main():
+    results_dir = sys.argv[1] if len(sys.argv) > 1 else "tests/load_tests/results"
+
+    baseline = parse_stats_csv(os.path.join(results_dir, "baseline_stats.csv"))
+    sidecar = parse_stats_csv(os.path.join(results_dir, "sidecar_stats.csv"))
+
+    if not baseline:
+        print("No baseline results found")
+        return
+
+    print("=" * 70)
+    print(f"{'Metric':<25} {'Baseline':>12} {'Sidecar':>12} {'Change':>12}")
+    print("=" * 70)
+
+    if sidecar:
+        metrics = [
+            ("Total Requests", "requests", ""),
+            ("Failures", "failures", ""),
+            ("Requests/sec", "rps", " rps"),
+            ("Median (ms)", "median", " ms"),
+            ("Average (ms)", "avg", " ms"),
+            ("P50 (ms)", "p50", " ms"),
+            ("P90 (ms)", "p90", " ms"),
+            ("P95 (ms)", "p95", " ms"),
+            ("P99 (ms)", "p99", " ms"),
+            ("P99.9 (ms)", "p999", " ms"),
+            ("Max (ms)", "max", " ms"),
+        ]
+
+        for label, key, unit in metrics:
+            b_val = baseline[key]
+            s_val = sidecar[key]
+            if b_val > 0:
+                if key in ("rps", "requests"):
+                    change = ((s_val - b_val) / b_val) * 100
+                else:
+                    change = ((s_val - b_val) / b_val) * 100
+                change_str = f"{change:+.1f}%"
+            else:
+                change_str = "N/A"
+            print(f"{label:<25} {b_val:>10.1f}{unit:>2} {s_val:>10.1f}{unit:>2} {change_str:>12}")
+    else:
+        print("Sidecar results not available yet. Baseline only:")
+        for key, val in baseline.items():
+            print(f"  {key}: {val}")
+
+    print("=" * 70)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/load_tests/loadtest_config.yaml b/tests/load_tests/loadtest_config.yaml
new file mode 100644
index 00000000000..b51ae1951da
--- /dev/null
+++ b/tests/load_tests/loadtest_config.yaml
@@ -0,0 +1,17 @@
+model_list:
+  - model_name: fake-openai-endpoint
+    litellm_params:
+      model: openai/fake-model
+      api_key: fake-key
+      api_base: http://127.0.0.1:18888/
+
+general_settings:
+  master_key: sk-1234
+  disable_spend_logs: True
+
+litellm_settings:
+  drop_params: True
+  telemetry: False
+  num_retries: 0
+  request_timeout: 30
+  callbacks: []
diff --git a/tests/load_tests/loadtest_config_sidecar.yaml b/tests/load_tests/loadtest_config_sidecar.yaml
new file mode 100644
index 00000000000..92882b18cec
--- /dev/null
+++ b/tests/load_tests/loadtest_config_sidecar.yaml
@@ -0,0 +1,19 @@
+model_list:
+  - model_name: fake-openai-endpoint
+    litellm_params:
+      model: openai/fake-model
+      api_key: fake-key
+      api_base: http://127.0.0.1:18888/
+
+general_settings:
+  master_key: sk-1234
+  disable_spend_logs: True
+  use_sidecar: True
+  sidecar_port: 8787
+
+litellm_settings:
+  drop_params: True
+  telemetry: False
+  num_retries: 0
+  request_timeout: 30
+  callbacks: []
diff --git a/tests/load_tests/locustfile.py b/tests/load_tests/locustfile.py
new file mode 100644
index 00000000000..a59572a5a79
--- /dev/null
+++ b/tests/load_tests/locustfile.py
@@ -0,0 +1,39 @@
+"""
+Locust load test for LiteLLM proxy.
+
+Usage:
+    # Start mock server:
+    poetry run python tests/load_tests/mock_openai_server.py &
+
+    # Start proxy:
+    poetry run litellm --config tests/load_tests/loadtest_config.yaml --port 4000 &
+
+    # Run headless load test (baseline):
+    poetry run locust -f tests/load_tests/locustfile.py \
+        --headless -u 200 -r 50 --run-time 30s \
+        --host http://localhost:4000 \
+        --csv results/baseline \
+        --only-summary
+
+    # Run with web UI:
+    poetry run locust -f tests/load_tests/locustfile.py --host http://localhost:4000
+"""
+
+from locust import HttpUser, task, between
+
+
+class ChatCompletionUser(HttpUser):
+    wait_time = between(0.01, 0.02)
+
+    @task
+    def post_chat_completions(self):
+        headers = {
+            "Content-Type": "application/json",
+            "Authorization": "Bearer sk-1234",
+        }
+        data = {
+            "model": "fake-openai-endpoint",
+            "max_tokens": 10,
+            "messages": [{"role": "user", "content": "Hello"}],
+        }
+        self.client.post("/chat/completions", json=data, headers=headers)
diff --git a/tests/load_tests/mock_openai_server.py b/tests/load_tests/mock_openai_server.py
new file mode 100644
index 00000000000..47005bc67b4
--- /dev/null
+++ b/tests/load_tests/mock_openai_server.py
@@ -0,0 +1,43 @@
+"""
+Ultra-fast mock OpenAI server for load testing.
+Returns minimal valid responses with near-zero processing time.
+"""
+import time
+import uvicorn
+from fastapi import FastAPI, Request
+from fastapi.responses import JSONResponse, StreamingResponse
+
+app = FastAPI()
+
+MOCK_RESPONSE = {
+    "id": "chatcmpl-mock-loadtest",
+    "object": "chat.completion",
+    "created": 0,
+    "model": "fake-model",
+    "choices": [
+        {
+            "index": 0,
+            "message": {"role": "assistant", "content": "Mock response for load testing."},
+            "finish_reason": "stop",
+        }
+    ],
+    "usage": {"prompt_tokens": 10, "completion_tokens": 8, "total_tokens": 18},
+}
+
+
+@app.post("/v1/chat/completions")
+@app.post("/chat/completions")
+async def chat_completions(request: Request):
+    body = await request.body()
+    response = MOCK_RESPONSE.copy()
+    response["created"] = int(time.time())
+    return JSONResponse(response)
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="127.0.0.1", port=18888, log_level="warning", access_log=False)
diff --git a/tests/load_tests/run_loadtest.sh b/tests/load_tests/run_loadtest.sh
new file mode 100755
index 00000000000..46afbd7372d
--- /dev/null
+++ b/tests/load_tests/run_loadtest.sh
@@ -0,0 +1,111 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WORKSPACE="$(cd "$SCRIPT_DIR/../.." && pwd)"
+RESULTS_DIR="$SCRIPT_DIR/results"
+mkdir -p "$RESULTS_DIR"
+
+USERS=${1:-200}
+SPAWN_RATE=${2:-50}
+DURATION=${3:-60s}
+
+echo "=== LiteLLM Sidecar Load Test ==="
+echo "Users: $USERS, Spawn Rate: $SPAWN_RATE, Duration: $DURATION"
+echo ""
+
+# Function to wait for a service
+wait_for_service() {
+    local url=$1
+    local name=$2
+    local max_attempts=${3:-30}
+    echo "Waiting for $name at $url..."
+    for i in $(seq 1 $max_attempts); do
+        if curl -s "$url" > /dev/null 2>&1; then
+            echo "$name is ready!"
+            return 0
+        fi
+        sleep 1
+    done
+    echo "ERROR: $name failed to start"
+    return 1
+}
+
+# Step 1: Start mock server (if not running)
+if ! curl -s http://127.0.0.1:18888/health > /dev/null 2>&1; then
+    echo "Starting mock OpenAI server on port 18888..."
+    cd "$WORKSPACE" && poetry run python tests/load_tests/mock_openai_server.py &
+    MOCK_PID=$!
+    wait_for_service "http://127.0.0.1:18888/health" "Mock Server"
+else
+    echo "Mock server already running on port 18888"
+fi
+
+# Step 2: Run baseline test
+echo ""
+echo "=== BASELINE TEST (Python-only) ==="
+echo "Starting proxy on port 4000..."
+
+# Kill any existing proxy on port 4000
+lsof -ti:4000 | xargs kill -9 2>/dev/null || true
+sleep 1
+
+cd "$WORKSPACE" && poetry run litellm --config tests/load_tests/loadtest_config.yaml --port 4000 &
+PROXY_PID=$!
+wait_for_service "http://localhost:4000/health/liveliness" "LiteLLM Proxy" 30
+
+echo "Running baseline locust test..."
+cd "$WORKSPACE" && poetry run locust -f tests/load_tests/locustfile.py \
+    --headless -u "$USERS" -r "$SPAWN_RATE" --run-time "$DURATION" \
+    --host http://localhost:4000 \
+    --csv "$RESULTS_DIR/baseline" \
+    --only-summary 2>&1 | tee "$RESULTS_DIR/baseline_output.txt"
+
+# Kill baseline proxy
+kill $PROXY_PID 2>/dev/null || true
+sleep 2
+
+# Step 3: Run sidecar test
+echo ""
+echo "=== SIDECAR TEST (Rust forwarding) ==="
+
+# Start sidecar
+SIDECAR_BIN="$WORKSPACE/litellm-sidecar/target/release/litellm-sidecar"
+if [ ! -f "$SIDECAR_BIN" ]; then
+    echo "Building sidecar..."
+    cd "$WORKSPACE/litellm-sidecar" && cargo build --release
+fi
+
+echo "Starting sidecar on port 8787..."
+SIDECAR_PORT=8787 "$SIDECAR_BIN" &
+SIDECAR_PID=$!
+wait_for_service "http://127.0.0.1:8787/health" "Sidecar"
+
+echo "Starting proxy on port 4000 (sidecar mode)..."
+cd "$WORKSPACE" && USE_SIDECAR=true SIDECAR_PORT=8787 \
+    poetry run litellm --config tests/load_tests/loadtest_config_sidecar.yaml --port 4000 &
+PROXY_PID=$!
+wait_for_service "http://localhost:4000/health/liveliness" "LiteLLM Proxy (Sidecar)" 30
+
+echo "Running sidecar locust test..."
+cd "$WORKSPACE" && poetry run locust -f tests/load_tests/locustfile.py \
+    --headless -u "$USERS" -r "$SPAWN_RATE" --run-time "$DURATION" \
+    --host http://localhost:4000 \
+    --csv "$RESULTS_DIR/sidecar" \
+    --only-summary 2>&1 | tee "$RESULTS_DIR/sidecar_output.txt"
+
+# Cleanup
+kill $PROXY_PID 2>/dev/null || true
+kill $SIDECAR_PID 2>/dev/null || true
+
+# Step 4: Compare results
+echo ""
+echo "=== COMPARISON ==="
+echo ""
+echo "--- Baseline ---"
+tail -5 "$RESULTS_DIR/baseline_output.txt"
+echo ""
+echo "--- Sidecar ---"
+tail -5 "$RESULTS_DIR/sidecar_output.txt"
+echo ""
+echo "Results saved to $RESULTS_DIR/"