Flush the optimizing compilejob queue when doing memory pressure GCs

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index b3b24930e2d4329da1431ee842d0237be151705d..84681000d39eac5a3069208ccf2123349aa7aa8b 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -4372,6 +4372,13 @@ class MemoryPressureInterruptTask : public CancelableTask {
 };
 
 void Heap::CheckMemoryPressure() {
+  if (HighMemoryPressure()) {
+    if (isolate()->concurrent_recompilation_enabled()) {
+      // The optimizing compiler may be unnecessarily holding on to memory.
+      DisallowHeapAllocation no_recursive_gc;
+      isolate()->optimizing_compile_dispatcher()->Flush();
+    }
+  }
   if (memory_pressure_level_.Value() == MemoryPressureLevel::kCritical) {
     CollectGarbageOnMemoryPressure("memory pressure");
   } else if (memory_pressure_level_.Value() == MemoryPressureLevel::kModerate) {