android-performance-profiler

android-performance-profiler is a skill for Claude Code, Codex from Desquared/agents-rules-skills. It costs 50 tokens per session (462 once invoked), scanned A, original, MIT.

A performance-review specialist for Jetpack Compose, Android’s toolkit for building app interfaces. It looks for slow screen updates, unnecessary drawing, memory problems, and inefficient lists or animations.

In plain words
What is it for?
Use it to review Compose code involving lists, animations, complex screens, state changes, recompositions, image loading, and lifecycle management.
Why use it?
It helps explain why an interface may redraw too often, use too much memory, or slow down when displaying complex or changing content.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/desquared/agents-rules-skills/android-performance-profiler
Any agent
npx skills add Desquared/agents-rules-skills --skill android-performance-profiler
Clone the repo
git clone --depth 1 https://github.com/Desquared/agents-rules-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for android-performance-profiler

README.md
[![agentmods](https://agentmods.dev/badge/skills/desquared/agents-rules-skills/android-performance-profiler.svg)](https://agentmods.dev/skills/desquared/agents-rules-skills/android-performance-profiler)
Your own site
<a href="https://agentmods.dev/skills/desquared/agents-rules-skills/android-performance-profiler"><img src="https://agentmods.dev/badge/skills/desquared/agents-rules-skills/android-performance-profiler.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 462 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00050 $0.00462
Opus 5 $0.00025 $0.00231
Sonnet 5 $0.00010 $0.00092
Haiku 4.5 $0.00005 $0.00046

Measured 5d ago against content hash 6a9bb0aaa5f1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

android-performance-profiler scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/android-performance-profiler/SKILL.md · 55 lines

What it actually says

Performance Profiler (Android)

Checklist

Recompositions

  • Composables only recompose when state changes
  • State properly scoped with remember
  • Stable item keys in LazyColumn
  • Annotate custom data classes with @Stable or @Immutable
  • Defer state reads (wrap in lambdas where possible)
  • Avoid backwards writes (never write to a state that was already read higher in the same composable)

Lists

  • Use LazyColumn not Column + verticalScroll for large data
  • Stable keys via key() parameter
  • Lightweight item composables

Memory

  • No memory leaks (avoid Activity/View refs)
  • Use Coil/Glide for image loading with caching
  • Proper lifecycle management

Body Computation

  • No heavy work in composable body
  • Use remember for expensive calculations
  • Use derivedStateOf for derived state

Quick Wins

Issue Fix
Parent recomposes Extract stable child composables
Expensive body Use remember or derivedStateOf
Unstable IDs Use stable keys in LazyColumn
Memory leak Avoid storing Activity/View references
Broad recomposition Narrow state scope
Unstable custom types causing broad recompositions Add @Stable/@Immutable
Backwards write or immediate state read Defer with lambda or derivedStateOf

Debug

Use Layout Inspector → Recomposition Counts to visualize recompositions
Use Compose Compiler Metrics report (stability analysis)
Enable Composition Tracing in Layout Inspector

Severity

  • 🔴 Critical: Visible lag, leaks
  • 🟡 Moderate: Noticeable impact
  • 🟢 Minor: Optimization opportunity
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 55 lines · 50 tokens per session scan A 6a9bb0aaa5f1

Subscribe to this mod's changes

android-performance-profiler is a skill published in the GitHub repository Desquared/agents-rules-skills (4 stars, last pushed 21d ago), licensed MIT. It adds 50 tokens to every session and 462 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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