ahrav/bench-compare
.claude/skills/bench-compare/SKILL.md
Use when measuring optimization impact against a baseline, when validating that a code change didn't regress performance, or when comparing two implementation approaches. Criterion benchmark baseline comparison workflow.
$ install --global
skillsauthnpx skillsauth add ahrav/gossip-rs bench-compareInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- bench-compare
- description:
- Use when measuring optimization impact against a baseline, when validating that a code change didn't regress performance, or when comparing two implementation approaches. Criterion benchmark baseline comparison workflow.
Benchmark Comparison Workflow
Compare benchmark results against a baseline to measure optimization impact.
Usage
Invoke with optional benchmark filter:
/bench-compare- Run all benchmarks/bench-compare scan- Run only scan-related benchmarks/bench-compare throughput- Run throughput benchmarks
Workflow
1. Establish Baseline
Before making changes, save current benchmark results:
cargo bench --bench <name> -- --save-baseline before
Or for all benchmarks:
cargo bench -- --save-baseline before
2. Apply Changes
Make the optimization changes to the codebase.
3. Compare Results
Run benchmarks against the saved baseline:
cargo bench --bench <name> -- --baseline before
4. Analyze Output
Look for these patterns in Criterion output:
Performance has improved- Optimization successfulPerformance has regressed- Changes hurt performanceNo change in performance- Within noise threshold
5. Report Summary
Provide a summary table:
| Benchmark | Before | After | Change | |-----------|--------|-------|--------| | name | X ns | Y ns | -Z% |
Available Benchmarks
Benchmarks are distributed across crates in crates/*/benches/:
gossip-contracts:identity.rs— Identity type construction and derivationgossip-coordination:coordination.rs— Shard coordination operationsgossip-coordination:sim.rs— Simulation harness benchmarksgossip-stdx:byte_slab.rs— Byte slab pool allocationgossip-stdx:inline_vec.rs— InlineVec operationsgossip-stdx:ring_buffer.rs— RingBuffer throughput
Tips
- Use
-p <crate> --bench <name>to run specific benchmarks:cargo bench -p gossip-stdx --bench inline_vec - Run all benchmarks:
cargo bench --workspace - Compare multiple runs to account for variance
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