13eholder/m10-performance
m10-performance/SKILL.md
Mastering C++ Performance. Triggers: cache locality, heap allocation, inlining, SIMD, standard layout, string_view, reserve, pmr.
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skillsauthnpx skillsauth add 13eholder/modern-cpp-skills m10-performanceInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- m10-performance
- description:
- Mastering C++ Performance. Triggers: cache locality, heap allocation, inlining, SIMD, standard layout, string_view, reserve, pmr.
C++ Performance
Core Question
Where is the data?
- Contiguous? (Cache friendly) →
std::vector. - Scattered? (Cache miss) →
std::list,std::map.
Thinking Prompt
-
Count the Allocations.
- Can they be fused? (
reserve). - Can they be removed? (Stack / SSO).
- Can they be fused? (
-
Measure, Don't Guess.
- Use Google Benchmark or Quick-Bench.
-
Data Layout.
structpadding? Reorder members largest to smallest.- Pointer chasing? Flatten the graph.
Quick Reference
| Technique | Benefit | Implementation |
| ----------------- | -------------- | -------------------------------------- |
| reserve() | Avoid reallocs | Call before loop. |
| string_view | No copy string | Params. |
| std::vector | Cache locality | Default container. |
| PMR | Custom alloc | std::pmr::monotonic_buffer_resource. |
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