Add per-stage summaries to benchmark output#55
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When running multi-stage benchmarks (sweeps), the JSON summary now includes a `stages` array with per-stage statistics: concurrency, duration, request count, error rate, throughput, TTFT, ITL, and E2E latency percentiles. Each stage's stats are computed by filtering request records to the stage's time window using the existing Compute() function. This enables downstream tooling (pareto charts, regression detection) to analyze performance at each concurrency level without needing to post-process raw JSONL records. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Tyler Michael Smith <tlrmchlsmth@gmail.com>
When --json is set, all slog output is discarded and the human-readable summary banner is skipped. Only the JSON summary is printed to stdout, making it easy to collect results programmatically. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Tyler Michael Smith <tlrmchlsmth@gmail.com>
Bool flags like --json should be passed as just --json, not --json true. The latter causes cobra to interpret "true" as a positional argument. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Tyler Michael Smith <tlrmchlsmth@gmail.com>
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Summary
stagesarray with per-stage stats: concurrency, duration, request count, error rate, throughput (tok/s), TTFT, ITL, and E2E latency percentilesCompute()functionTest plan
ComputeStagesand empty inputgo test ./...)🤖 Generated with Claude Code