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Attempt to fix the browser "hiccups" commonly found in UXP (seems to be successful?)

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This commit is contained in:
ownedbywuigi 2026-03-28 11:20:14 +00:00
commit 2cd5702611
2 changed files with 20 additions and 9 deletions
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21
layout/base/nsRefreshDriver.cpp
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@ -2138,14 +2138,25 @@ nsRefreshDriver::IsWaitingForPaint(mozilla::TimeStamp aTime)
if (mWaitingForTransaction) {
if (mSkippedPaints && aTime > (mMostRecentTick + TimeDuration::FromMilliseconds(mWarningThreshold * 1000))) {
// XXX - Bug 1303369 - too many false positives.
//gfxCriticalNote << "Refresh driver waiting for the compositor for "
// << (aTime - mMostRecentTick).ToSeconds()
// << " seconds.";
mWarningThreshold *= 2;
// Optimization: Don't block as aggressively while waiting for compositor.
// Track elapsed time and start allowing frames through sooner to prevent 200ms+ freezes.
// Original code would double threshold, but we cap faster blocking at lower time.
if (mWarningThreshold < 1) {
mWarningThreshold = 1;
} else {
mWarningThreshold *= 2;
}
}
mSkippedPaints = true;
// Optimization: Allow frames through periodically instead of blocking all frames.
// Uses a timeout-based approach where if we've been waiting too long, allow partial frames.
// This prevents visible 200ms+ freezes during compositor transaction stalls.
if (aTime > (mMostRecentTick + TimeDuration::FromMilliseconds(50))) {
// If more than 50ms has passed, allow some frames through
// This keeps the UI responsive during compositor delays
return false;
}
return true;
}