kotlin-native-performance-experiment

This repo, reproduces the KorGE bunnymark-fast update code that is slow on Kotlin/Native, it is self-contained, except when marking all the methods as inline (that hurts performance on JVM and JS).

Details here: https://kotlinlang.slack.com/archives/C3SGXARS6/p1619349974244300 Related YouTrack issue: https://youtrack.jetbrains.com/issue/KT-46425

There are three self-contained implementations without external dependencies adjusting inlining const val and marking all the methods as inline:

Kotlin 1.5.0 (Windows)

Executing INLINED...
Executed INLINED sixty frames in 703ms
Executing NON-INLINED-BUT-CONST...
Executed NON-INLINED-BUT-CONST sixty frames in 1.03s
Executing NON-INLINED...
Executed NON-INLINED sixty frames in 26.5s

Kotlin 1.5.0 (Linux)

https://github.com/korlibs/kotlin-native-performance-experiment/runs/2478341432?check_suite_focus=true#step:5:64

Executing INLINED...
Executed INLINED sixty frames in 1.04s
Executing NON-INLINED-BUT-CONST...
Executed NON-INLINED-BUT-CONST sixty frames in 1.71s
Executing NON-INLINED...
Executed NON-INLINED sixty frames in 4.84s

Kotlin 1.4.32 (Windows)

Executing INLINED...
Executed INLINED sixty frames in 865ms
Executing NON-INLINED-BUT-CONST...
Executed NON-INLINED-BUT-CONST sixty frames in 38.7s
Executing NON-INLINED...
Executed NON-INLINED sixty frames in 63.3s

Kotlin 1.4.32 (Windows) (Patched) JetBrains/kotlin#4339

Executing INLINED...
Executed INLINED sixty frames in 864ms
Executing NON-INLINED-BUT-CONST...
Executed NON-INLINED-BUT-CONST sixty frames in 10.3s
Executing NON-INLINED...
Executed NON-INLINED sixty frames in 14.4s

Kotlin 1.4.32 (Linux)

https://github.com/korlibs/kotlin-native-performance-experiment/runs/2478337835?check_suite_focus=true#step:5:84