Skills, instructions para Performance

[Kiquenet]

https://github.com/dotnet/skills/blob/main/plugins/dotnet-diag/skills/analyzing-dotnet-performance/SKILL.md

Scans .NET code for ~50 performance anti-patterns across async, memory, strings, collections, LINQ, regex, serialization, and I/O with tiered severity classification. Use when analyzing .NET code for optimization opportunities, reviewing hot paths, or auditing allocation-heavy patterns.