Bug 1689394 - Increase idle time nursery collection timeout to make it less agressive r=sfink

Differential Revision: https://phabricator.services.mozilla.com/D106127

js/public/GCAPI.h

@@ -401,7 +401,7 @@ typedef enum JSGCParamKey {
    * JS::RunIdleTimeGCTask will collect the nursery if it hasn't been collected
    * in this many milliseconds.
    *
-   * Default: 2000
+   * Default: 5000
    * Pref: None
    */
   JSGC_NURSERY_TIMEOUT_FOR_IDLE_COLLECTION_MS = 46,

js/src/gc/Scheduling.h

@@ -414,7 +414,7 @@ static const double NurseryFreeThresholdForIdleCollectionFraction = 0.25;
 
 /* JSGC_NURSERY_TIMEOUT_FOR_IDLE_COLLECTION_MS */
 static const TimeDuration NurseryTimeoutForIdleCollection =
-    TimeDuration::FromSeconds(2.0);
+    TimeDuration::FromSeconds(5.0);
 
 /* JSGC_PRETENURE_THRESHOLD */
 static const double PretenureThreshold = 0.6;