# Perf

> Performs performance audits. Checks response times, memory usage, CPU utilization, algorithmic complexity, and resource management. Use when investigating slowness, memory leaks, or optimizing performance.

- **Type:** Skill
- **Install:** `agentstack add skill-pvnarp-agent-skills-perf`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [pvnarp](https://agentstack.voostack.com/s/pvnarp)
- **Installs:** 0
- **Category:** [Cloud & Infrastructure](https://agentstack.voostack.com/c/cloud-infrastructure)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [pvnarp](https://github.com/pvnarp)
- **Source:** https://github.com/pvnarp/agent-skills/tree/main/skills/perf

## Install

```sh
agentstack add skill-pvnarp-agent-skills-perf
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Performance Audit

## Response Time / Throughput

- Identify hot paths - what runs most frequently?
- Flag any blocking I/O on critical paths (network calls, disk reads, DB queries in request handlers)
- Check for N+1 query patterns
- Verify appropriate use of caching
- Check connection pooling for databases and HTTP clients

## Memory

- No object allocations in tight loops or hot paths where avoidable
- Resources (connections, streams, file handles) properly closed
- No unbounded growth of collections, caches, or queues
- Check for closure/callback reference leaks
- Verify garbage collection pressure is manageable

## CPU

- Algorithmic complexity appropriate? Flag O(n^2) or worse in hot paths
- No redundant computation (computing the same thing multiple times)
- Heavy computation offloaded from main/UI thread
- Regex compiled once, not per-invocation
- String operations efficient (no repeated concatenation in loops)

## Concurrency

- Thread pool sizes appropriate for workload
- No contention on shared locks in hot paths
- Async operations used where I/O-bound (not CPU-bound)
- Connection pools sized correctly

## Database

- Queries use indexes? Check EXPLAIN plans for common queries
- No full table scans on large tables
- Pagination for large result sets
- Batch operations where possible (not row-by-row)
- Connection pool not exhausted under load

## Network

- Payloads sized appropriately? Compress large responses
- Connection reuse (keep-alive, HTTP/2)
- Timeouts configured (no infinite waits)
- Retry logic with backoff (no retry storms)

## Utility Scripts

- `scripts/find_hot_spots.sh [dir]` - Find long functions (100+ lines), deeply nested loops, perf-related TODOs, and large files.

## Output

```
[CRITICAL] file:line - description - impact - fix
[WARNING]  file:line - description - impact - fix
[OK]       area - looks good because...
```

End with: biggest risks, top 3 priorities, estimated impact of each fix.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [pvnarp](https://github.com/pvnarp)
- **Source:** [pvnarp/agent-skills](https://github.com/pvnarp/agent-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-pvnarp-agent-skills-perf
- Seller: https://agentstack.voostack.com/s/pvnarp
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.