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⚡ make Skiko's periodic System.gc() a concurrent cycle #4913

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Merged
guiyanakuang merged 1 commit into from
Sep 4, 2026
+11 −0
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⚡ make Skiko's periodic System.gc() a concurrent cycle #4913

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11 changes: 11 additions & 0 deletions app/build.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -305,6 +305,17 @@ private fun initJvmArgs(
),
)

// Skiko's FrameWatcher calls System.gc() every 30 s while the UI is
// rendering (>1000 frames per interval) to release native Skia peers.
// Under G1 that is a stop-the-world full collection, measured at
// 60-200 ms (one outlier of 2.3 s) on a 2-core VM, i.e. a visible
// stutter twice a minute whenever a window is animating. This flag turns
// explicit GCs into a concurrent cycle: the cleaners still run at remark,
// but the pause shrinks to a few milliseconds (see PR for the A/B data).
// Ignored by collectors other than G1, so single-core machines that
// default to Serial GC are unaffected.
jvmArgs(arrayOf("-XX:+ExplicitGCInvokesConcurrent"))

// Open modules required for all platforms
jvmArgs(arrayOf("--add-opens", "java.desktop/sun.awt=ALL-UNNAMED"))
jvmArgs(arrayOf("--add-opens", "java.desktop/java.awt.peer=ALL-UNNAMED"))
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