Agent-skills-standard ios-performance

Profile and optimize iOS apps with Instruments, memory management, and rendering techniques. Use when profiling iOS apps with Instruments or optimizing memory and rendering. (triggers: **/*.swift, Instruments, Allocations, Leaks, dequeueReusableCell)

install

source · Clone the upstream repo

git clone https://github.com/HoangNguyen0403/agent-skills-standard

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/HoangNguyen0403/agent-skills-standard "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/ios/ios-performance" ~/.claude/skills/hoangnguyen0403-agent-skills-standard-ios-performance && rm -rf "$T"

manifest: skills/ios/ios-performance/SKILL.md

source content

iOS Performance

Priority: P0

Implementation Workflow

Profile with Instruments — Regularly use Allocations and Leaks to detect memory issues. Use Time Profiler for CPU stalls.
Reuse cells — Always use
```
dequeueReusableCell
```
and keep
```
cellForRowAt
```
lightweight.
Cache images — Use
```
SDWebImage
```
or
```
Kingfisher
```
for remote assets.
```
AsyncImage
```
lacks caching for lists.
Offload to background — Move parsing, encryption, and heavy computation off Main thread using GCD or Tasks.
Enable strict warnings — Set
```
SWIFT_TREAT_WARNINGS_AS_ERRORS
```
in Release builds.
Run static analysis — Use Xcode's "Analyze" (Product > Analyze) to catch logic errors.

See background processing and cell reuse examples

Anti-Patterns

No Main-thread Processing: Offload parsing/processing to background using
```
Task.detached
```
or GCD
No Manual Cache Clears: Let system handle low-memory via
```
applicationDidReceiveMemoryWarning
```
No Retain Cycles: Use Leaks instrument frequently during development

References

Profiling & Optimization