http-load-profiler

# HTTP Load Profiler — Stepped Concurrency Load Test + Inflection Point Analysis Run stepped concurrency load tests against HTTP services, automatically collect latency percentiles, and detect performance inflection points. ## Features - **Dual engine support**: Auto-detects wrk (preferred) or ab (Apache Bench); manual override available - **Stepped concurrency**: Ramps up through user-defined concurrency levels (default: 1 → 10 → 50 → 100 → 200 → 500) - **Latency percentiles**: Collects p50 / p90 / p99 latency at each level - **Inflection point detection**: Automatically identifies four types of performance inflection points - p99 latency accelerating (increase exceeds 2x the previous step's increase) - Throughput efficiency dropping significantly (RPS per connection drops > 40%) - Throughput saturated while latency spikes (RPS growth < 10%, p99 growth > 50%) - Error rate surging (exceeds 1% and doubles from previous step) - **Optimal concurrency recommendation**: Automatically suggests the best concurrency level based on inflection points - **Zero Python dependencies**: Pure standard library implementation ## Quick Start ```bash # Basic usage — run default stepped load test against target URL python3 scripts/http_benchmark.py https://example.com/api/health # Custom concurrency steps and duration per step python3 scripts/http_benchmark.py https://example.com/api/health -s 5,20,50,100,300 -d 15 # Specify ab as the engine python3 scripts/http_benchmark.py https:...