build-perf-baseline Skill

Source

• Creator: microsoft
• Repository: microsoft/testfx
• Skill file: .agents/skills/build-perf-baseline/SKILL.md

What it does

Establish build performance baselines and apply systematic optimization techniques. USE FOR: diagnosing slow builds, establishing before/after measurements (cold, warm, no-op scenarios), applying optimization strategies like MSBuild Server, static graph builds, artifacts output, and dependency graph trimming. Start her

Skill instructions

Build Performance Baseline & Optimization Overview Before optimizing a build, you need a baseline. Without measurements, optimization is guesswork. This skill covers how to establish baselines and apply systematic optimization techniques. Related skills: - build-perf-diagnostics — binlog-based bottleneck identification - incremental-build — Inputs/Outputs and up-to-date checks - build-parallelism — parallel and graph build tuning - eval-performance — glob and import chain optimization --- Step 1: Establish a Performance Baseline Measure three scenarios to understand where time is spent: Cold Build (First Build) No previous build output exists. Measures the full end-to-end time including restore, compilation, and all targets. bash Clean everything first dotnet clean Remove bin/obj to truly start fresh Get-ChildItem -Recurse -Directory -Include bin,obj | Remove-Item -Recurse -Force OR on Linux/macOS: find . -type d ( -name bin -o -name obj ) -exec rm -rf {} + Measure cold build dotnet