Increase the delay of memory reducer to make it less likely to start GC

src/heap/memory-reducer.cc

Index: src/heap/memory-reducer.cc
diff --git a/src/heap/memory-reducer.cc b/src/heap/memory-reducer.cc
index 45d6bd3d7fbdcf0fcaa5f009dcd8ea25a7271139..3e90005b61cdfbe0a44a3b1b2427c7440ac5926e 100644
--- a/src/heap/memory-reducer.cc
+++ b/src/heap/memory-reducer.cc
@@ -13,7 +13,7 @@
 namespace v8 {
 namespace internal {
 
-const int MemoryReducer::kLongDelayMs = 5000;
+const int MemoryReducer::kLongDelayMs = 20000;
 const int MemoryReducer::kShortDelayMs = 500;
 const int MemoryReducer::kWatchdogDelayMs = 100000;
 const int MemoryReducer::kMaxNumberOfGCs = 3;