From 3ae3595f6a502ac43e4ce430398905910342d505 Mon Sep 17 00:00:00 2001
From: Basilisk-Dev <basiliskdev@protonmail.com>
Date: Sun, 24 May 2026 14:53:56 -0400
Subject: [PATCH] Revert "Issue #3092 - Perform a minor GC on tab close"

This reverts commit 266cc371f7bbb507c07f4e65a1244e5094cd1623.
---
 js/src/jsgc.cpp | 22 +++-------------------
 1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/js/src/jsgc.cpp b/js/src/jsgc.cpp
index 68fcd46770..0066ca962e 100644
--- a/js/src/jsgc.cpp
+++ b/js/src/jsgc.cpp
@@ -6060,12 +6060,6 @@ GCRuntime::checkCanCallAPI()
 bool
 GCRuntime::checkIfGCAllowedInCurrentState(JS::gcreason::Reason reason)
 {
-    auto isTabCloseReason = [](JS::gcreason::Reason r) {
-        return r == JS::gcreason::PAGE_HIDE ||
-               r == JS::gcreason::POST_COMPARTMENT ||
-               r == JS::gcreason::NSJSCONTEXT_DESTROY;
-    };
-
     if (rt->mainThread.suppressGC)
         return false;
 
@@ -6074,10 +6068,8 @@ GCRuntime::checkIfGCAllowedInCurrentState(JS::gcreason::Reason reason)
     if (rt->isBeingDestroyed() && !IsShutdownGC(reason))
         return false;
 
-    // Allow fast tab-close cleanup even when the runtime is otherwise busy.
-    if (!isTabCloseReason(reason) &&
-        !IdleGCManager::shouldBypassIdleCheck(reason) &&
-        !idleGC.isIdleEnough())
+    // Check if the system is idle enough for GC, unless this is a critical GC
+    if (!IdleGCManager::shouldBypassIdleCheck(reason) && !idleGC.isIdleEnough())
         return false;
 
     return true;
@@ -6164,16 +6156,8 @@ js::AutoEnqueuePendingParseTasksAfterGC::~AutoEnqueuePendingParseTasksAfterGC()
 SliceBudget
 GCRuntime::defaultBudget(JS::gcreason::Reason reason, int64_t millis)
 {
-    auto isTabCloseReason = [](JS::gcreason::Reason r) {
-        return r == JS::gcreason::PAGE_HIDE ||
-               r == JS::gcreason::POST_COMPARTMENT ||
-               r == JS::gcreason::NSJSCONTEXT_DESTROY;
-    };
-
     if (millis == 0) {
-        if (isTabCloseReason(reason))
-            millis = 3;
-        else if (reason == JS::gcreason::ALLOC_TRIGGER)
+        if (reason == JS::gcreason::ALLOC_TRIGGER)
             millis = defaultSliceBudget();
         else if (schedulingState.inHighFrequencyGCMode() && tunables.isDynamicMarkSliceEnabled())
             millis = defaultSliceBudget() * IGC_MARK_SLICE_MULTIPLIER;