Http Load Profiler
Run stepped HTTP load tests with ab/wrk, ramping concurrency levels to collect...
Install
npx skills add zebbern/claude-code-guide --skill http-load-profiler -g -a claude-code -y- Repository
- zebbern/claude-code-guide4.7k
- Category
- Testing
- Updated
- 4d ago
- License
- MIT
- Context cost
- Lightabout 1,434 tokens
- Runs scripts
- Yes, review before use
What it does
Run stepped HTTP load tests with ab/wrk, ramping concurrency levels to collect p50/p90/p99 latency, detect performance inflection points, and recommend optimal concurrency. Triggered by requests like 'load test this URL', 'benchmark my API', 'find the max concurrency', or mentions of p99 latency, throughput saturation, or capacity planning.
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
# 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://example.com/ -t ab
# JSON-only output (for programmatic parsing)
python3 scripts/http_benchmark.py https://example.com/api/health --json
# Use ab with a specific number of requests per step
python3 scripts/http_benchmark.py https://example.com/ -t ab -n 5000
# Save JSON report to a file
python3 scripts/http_benchmark.py https://example.com/api/health --json > report.json
