Kotlin Performance

Measurement-first performance work for Kotlin. Pair with kotlin-patterns for idiomatic code and android-testing for the test harness that hosts benchmarks.

If the target is a pure JVM library or CLI, most guidance transfers — skip the Android sections.

When to activate

• Investigating cold/warm/hot start latency, first-frame time, or ANR reports
• Diagnosing scroll jank, animation stutter, or Compose recomposition storms
• Tracing memory growth, GC churn, or leaks in a shipping app
• Deciding whether to enable R8 full mode, ship a Baseline Profile, or add a Startup Profile
• Benchmarking a JVM Kotlin hot path (JMH / kotlinx-benchmark) before proposing a redesign

Rules of engagement