Perf Check
Use when the user wants to check performance, find slow code, identify bottlenecks, or audit efficiency.
Install
$ agentstack add skill-huzaifa525-claude-code-optimizer-perf-check ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-huzaifa525-claude-code-optimizer-perf-check) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Analyze $ARGUMENTS for performance issues.
Check Categories
Database & Queries
- N+1 query patterns (loop with query inside)
- Missing indexes on frequently queried columns
- SELECT * instead of specific columns
- Missing pagination on list endpoints
- Unoptimized joins or subqueries
Memory & Resources
- Unclosed connections, streams, file handles
- Growing arrays/maps without limits
- Event listeners not removed on cleanup
- Large objects held in memory unnecessarily
- Missing cleanup in useEffect (React)
Frontend Performance
- Unnecessary re-renders (missing useMemo, useCallback, React.memo)
- Large bundle imports (import entire library vs specific module)
- Images without lazy loading or optimization
- Missing code splitting
- Synchronous operations blocking UI thread
- Missing virtualization for long lists
API & Network
- Missing caching (Redis, in-memory, HTTP cache headers)
- Redundant API calls
- Missing request deduplication
- Large payloads without compression
- Missing connection pooling
General
- O(n²) or worse algorithms where O(n) is possible
- Synchronous file I/O in async context
- Regex backtracking (catastrophic regex)
- Unnecessary deep cloning
Output Format
## Performance Report: [target]
### Critical (fix now)
- [file:line] [issue] [impact] [fix]
### Warning (should fix)
- [file:line] [issue] [impact] [fix]
### Suggestion (optimization)
- [file:line] [issue] [impact] [fix]
### Good Patterns Found
- [what's already well-optimized]Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: huzaifa525
- Source: huzaifa525/claude-code-optimizer
- License: MIT
- Homepage: https://www.npmjs.com/package/claude-code-optimizer
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.