3ac66feba2
gitignore 의 *.md / .claude/ 차단을 풀어 다음 파일을 git 으로 추적. - /CLAUDE.md, /AGENTS.md (루트 에이전트 가이드) - .agents/**/*.md (skills 문서 95개) - .claude/settings.json (Claude Code 프로젝트 설정) .claude/worktrees/ 는 git worktree 메타이므로 신규 ignore 라인으로 제외. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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| title | impact | impactDescription | tags |
|---|---|---|---|
| Hoist RegExp Creation | LOW-MEDIUM | avoids recreation | javascript, regexp, optimization, memoization |
Hoist RegExp Creation
Don't create RegExp inside render. Hoist to module scope or memoize with useMemo().
Incorrect (new RegExp every render):
function Highlighter({ text, query }: Props) {
const regex = new RegExp(`(${query})`, 'gi')
const parts = text.split(regex)
return <>{parts.map((part, i) => ...)}</>
}
Correct (memoize or hoist):
const EMAIL_REGEX = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
function Highlighter({ text, query }: Props) {
const regex = useMemo(
() => new RegExp(`(${escapeRegex(query)})`, 'gi'),
[query]
)
const parts = text.split(regex)
return <>{parts.map((part, i) => ...)}</>
}
Warning (global regex has mutable state):
Global regex (/g) has mutable lastIndex state:
const regex = /foo/g
regex.test('foo') // true, lastIndex = 3
regex.test('foo') // false, lastIndex = 0