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.agents/skills/kotlin-tooling-native-build-performance/references/experimental.md

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+# Experimental Switches
+
+Offer these last, label them experimental in the report, and keep them out of
+the default recommendation set. Get the user's agreement before enabling any
+of them.
+
+## Incremental compilation of klib artifacts
+
+```properties
+# gradle.properties
+kotlin.incremental.native=true
+```
+
+Recompiles only the changed part of a klib into the final binary, which helps
+warm rebuilds after small edits. If it causes broken or inconsistent builds,
+revert it and file a YouTrack issue with a minimized reproducer.
+
+## smallBinary
+
+The `smallBinary` binary option sets `-Oz` as the default LLVM optimization
+level to shrink release binaries and their link time. It can cost runtime
+performance, so verify hot paths before keeping it. It applies to release
+binaries — it is not a fix for slow debug loops.
+
+## LLVM backend customization
+
+Customizing the LLVM backend is a last resort when nothing else helps, and is
+out of scope for a routine performance pass — point the user at the official
+documentation instead of improvising compiler flags.
+
+Docs: https://kotlinlang.org/docs/native-binary-options.html and
+https://kotlinlang.org/docs/native-improving-compilation-time.html