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build-perf-diagnostics

separate

Diagnose MSBuild bottlenecks from binlog timelines and Target/Task Performance Summaries after build-perf-baseline establishes measurements. USE FOR: unknown build slowness, RAR >5s, analyzers >30% of Csc, one target >50% of build time, node utilization <80%, excessive Copy tasks, finding restore overhead. DO NOT USE FOR: known repeated-restore fixes (use eliminate-redundant-restores), initial baselines (use build-perf-baseline), incremental rebuilds (use incremental-build), parallelism tuning (use build-parallelism), non-MSBuild builds.

When to use

• unknown build slowness
• RAR >5s
• analyzers >30% of Csc
• one target >50% of build time
• node utilization <80%
• excessive Copy tasks
• finding restore overhead

When not to use

• known repeated-restore fixes
• initial baselines
• incremental rebuilds
• parallelism tuning
• non-MSBuild builds

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