performance-optimization is agent-read markdown (skill) from jpeetz/agent-skills: Use this skill when optimizing application performance across frontend (Core Web Vitals, bundles), backend (N+1 queries, connection pools, caching), and database (indexes, query plans). Profiles before fixing, pinpoints actual bottlenecks rather than assumed ones, verifies improvements by re-measuring the same way as baseline..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Performance Optimization
Measure before optimizing. Performance work without measurement is guessing — and guessing leads to premature optimization that adds complexity without improving what matters. Profile first, identify the actual bottleneck, fix it, measure again. Optimize only what measurements prove matters.
## When to Use This Skill
Use this skill when:
- Performance requirements exist in the spec (load time budgets, response time SLAs, LCP/INP/CLS targets)
- Users or monitoring report slow behavior (high latency, sluggish interactions, jank)
- Core Web Vitals scores are below 'Good' thresholds
- You suspect a recent change introduced a performance regression
- Building features that handle large datasets or high traffic volumes
- Profiling or tracing reveals a bottleneck that needs addressing
- An N+1 query pattern is discovered in data-fetching code
- Bundle size analysis shows large, unnecessary dependencies
**When NOT to use:** Do not optimize before you have empirical evidence of a problem. Premature optimization is a known source of bugs, complexity, and wasted effort. If you're guessing at what's slow, measure first.
## Core Web Vitals Targets
…
Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
GET https://markdownregistry.com/api/v1/artifacts/art_5uq5ea4plgr6alnu
GET https://markdownregistry.com/api/v1/resolve?ref=jpeetz/agent-skills/performance-optimization
GET https://markdownregistry.com/api/v1/blob/464a4f06b526ed17e18b92dcc39401d8271939110bac94882254c3cb14636ff1
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