JavaScript performance optimization guidelines. Use when writing, reviewing, or refactoring JavaScript/TypeScript code to ensure optimal performance patterns. Triggers on tasks involving loops, data structures, DOM manipulation, or general JS optimization.
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Use this Skill: https://skilld.dev/gh/sergiodxa/agent-skills/frontend-js-best-practices
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≈133 tokens on demand. Your agent reads this file only when SKILL.md points to it.
Convert arrays to Set/Map for repeated membership checks.
Incorrect (O(n) per check):
const allowedIds = ['a', 'b', 'c', ...]
items.filter(item => allowedIds.includes(item.id))Correct (O(1) per check):
const allowedIds = new Set(['a', 'b', 'c', ...])
items.filter(item => allowedIds.has(item.id))Source: SKILL.md on GitHub
The skill provides a comprehensive set of JavaScript and TypeScript performance and style guidelines. No security issues were detected.
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Risk: LOW · No issues
19/19 files flagged
Score: 93/100 · 2 sections analyzed
Signed by skilld at 2987820. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.
Last checked against GitHub 2 months ago.