From 8fd57ace20e1e6bb59dd83ed59f513954c0aed9d Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Tue, 26 Jan 2021 22:42:46 +0000
Subject: [DOM] Try to avoid slow shrinking GC during sync calls

---
 dom/workers/WorkerPrivate.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'dom/workers')

diff --git a/dom/workers/WorkerPrivate.cpp b/dom/workers/WorkerPrivate.cpp
index 860bf8468..1f8b3b70c 100644
--- a/dom/workers/WorkerPrivate.cpp
+++ b/dom/workers/WorkerPrivate.cpp
@@ -6392,7 +6392,7 @@ WorkerPrivate::GarbageCollectInternal(JSContext* aCx, bool aShrinking,
   if (aShrinking || aCollectChildren) {
     JS::PrepareForFullGC(aCx);
 
-    if (aShrinking) {
+    if (aShrinking && mSyncLoopStack.IsEmpty()) {
       JS::GCForReason(aCx, GC_SHRINK, JS::gcreason::DOM_WORKER);
 
       if (!aCollectChildren) {
-- 
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