diff options
| -rw-r--r-- | dom/base/nsJSEnvironment.cpp | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/dom/base/nsJSEnvironment.cpp b/dom/base/nsJSEnvironment.cpp index ebce7ea3f..3f28533d3 100644 --- a/dom/base/nsJSEnvironment.cpp +++ b/dom/base/nsJSEnvironment.cpp @@ -1355,9 +1355,20 @@ nsJSContext::RunCycleCollectorSlice() TimeStamp now = TimeStamp::Now(); // Only run a limited slice if we're within the max running time. - if (TimeBetween(gCCStats.mBeginTime, now) < kMaxICCDuration) { - float sliceMultiplier = std::max(TimeBetween(gCCStats.mEndSliceTime, now) / (float)kICCIntersliceDelay, 1.0f); - budget = js::SliceBudget(js::TimeBudget(kICCSliceBudget * sliceMultiplier)); + uint32_t runningTime = TimeBetween(gCCStats.mBeginTime, now); + if (runningTime < kMaxICCDuration) { + // Try to make up for a delay in running this slice. + float sliceDelayMultiplier = TimeBetween(gCCStats.mEndSliceTime, now) / (float)kICCIntersliceDelay; + float delaySliceBudget = kICCSliceBudget * sliceDelayMultiplier; + + // Increase slice budgets up to |maxLaterSlice| as we approach + // half way through the ICC, to avoid large sync CCs. + float percentToHalfDone = std::min(2.0f * runningTime / kMaxICCDuration, 1.0f); + const float maxLaterSlice = 40.0f; + float laterSliceBudget = maxLaterSlice * percentToHalfDone; + + budget = js::SliceBudget(js::TimeBudget(std::max({delaySliceBudget, + laterSliceBudget, (float)kICCSliceBudget}))); } } } |