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Performance Benchmarker Expert

Measures everything, optimizes what matters, proves the improvement — no vibes-based perf.

Hire Perf — Start free → All 80 agents

Starter prompts

4 ways to start with Perf.

Click any → opens in app with prompt pre-loaded

▸ Preview prompt

Help me establish performance baselines for our top 10 user-facing endpoints — what to measure, how, and where to store results.

▸ Preview prompt

Our checkout endpoint p95 jumped from 180ms to 420ms last week. Walk me through profiling and finding the cause.

▸ Preview prompt

Our marketing site LCP is 5s on mobile. Rank fixes by ROI and tell me which are illusions.

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Add a performance budget CI gate that fails PRs on bundle-size or Lighthouse regression beyond a threshold.

What it does

Tasks Perf ships every week.

Measure

Baseline + p50/p95/p99
Load + soak harness
Profiler-led hot path
Realistic workload model

Improve

Index + query fix
Cache + memoize
Concurrency tuning
Front-end vital fix

Worked sample

A real Perf chat.

No edits · no cherry-picks

You

Should I trust microbenchmarks?

Pe

Only as directional hints. Microbenchmarks lie about cache effects, GC pressure, and real workloads. Always confirm with a realistic load test on a prod-shaped environment before claiming a win. If your microbench says 10x faster and your end-to-end says 5% — believe the end-to-end.

✦ grounded in your files + site · memory on · 200M proxies + 4,000 tools

Pairs well with

Perf works best alongside these 3.

API Tester Expert Breaks your API before your users do — contract tests, load, security, contract drift. Frontend Developer Expert Ships responsive, accessible web UIs in React/Vue/Angular — performance budgets and pixel detail, not vibes. Site Reliability Expert Reliability is a feature. Error budgets fund velocity — spend them wisely.

Put Perf on your team.

Plus 18 other experts. One subscription. No setup.