skill

performance-optimizer — Claude Code skill: what it does

Q: How do I install performance-optimizer in Claude Code?

Run `npx claude-code-templates@latest --skill productivity/performance-optimizer`.

This skill helps locate slow points in code, databases, and APIs, then compare measurements before and after changes. Use it when a page, query, or endpoint feels slow.

Install into Claude Code · claude-code-templates All methods and platforms ↓

npx claude-code-templates@latest --skill productivity/performance-optimizer

Open on GitHub

What performance-optimizer does

The skill starts with measurements: page load, API response, database query, function runtime, or memory use. It then points to profiling options and suggests working on the slowest part first. Measure again after the change to see what improved.

Its examples cover database queries, API handlers, frontend rendering, algorithms, and memory use. They include replacing repeated lookups with a populated query, adding an index, running independent calls with Promise.all, and memoizing a React component. One constraint matters: the workflow relies on measurements, so changing code before identifying a bottleneck goes against its stated process.

What it helps with

trace a slow database query
reduce API latency by running independent calls in parallel
limit the fields returned to a client
prevent needless component renders
compare performance before and after a code change

Example prompts for the agent

Find what is slowing this page down, then measure before and after the fix.
Check these database calls for an N+1 pattern and suggest a measured improvement.
Profile this API handler and identify its slowest operation.

How to install performance-optimizer

1claude-code-templates

npx claude-code-templates@latest --skill productivity/performance-optimizer

2Skills CLI (Vercel)

npx skills add davila7/claude-code-templates --skill performance-optimizer -a claude-code

3Manually: put the files in place

~/.claude/skills/performance-optimizer/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/performance-optimizer/

Manually: put the files in place

.agents/skills/performance-optimizer/SKILL.md

For all projects use ~/.agents/skills/

Manually: put the files in place

.cursor/skills/performance-optimizer/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install davila7/claude-code-templates performance-optimizer

2Manually: put the files in place

.github/skills/performance-optimizer/SKILL.md

Platform CLI

gemini skills install https://github.com/davila7/claude-code-templates --path cli-tool/components/skills/productivity/performance-optimizer

Manually: put the files in place

.devin/skills/performance-optimizer/SKILL.md

The legacy .windsurf/skills/ path still works

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about performance-optimizer

How do I install performance-optimizer in Claude Code?

Run npx claude-code-templates@latest --skill productivity/performance-optimizer.

What does performance-optimizer do?

It guides the agent through measuring and diagnosing slow code, database work, and API responses. It also recommends comparing results after an optimization.

Why measure before optimizing?

Measurements help identify the actual bottleneck and show whether a change helped. The skill’s process starts with profiling rather than guessing at a fix.

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