commit 0670784eadcfd790cb6a6842e1dea23a155e94df
parent 9d14a76d61dc6a9f7fefa65484745b962ee7da4b
Author: Atila Butkovits <abutkovits@mozilla.com>
Date: Thu, 20 Nov 2025 08:02:03 +0200
Revert "Bug 1997192 - Enable JS MicroTaskQueue by default r=smaug" for causing performance regressions.
This reverts commit ea827274b43de2c5f7333cc4e912884b84320fed.
Diffstat:
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
@@ -9416,9 +9416,11 @@
do_not_use_directly: true
# Use the JS microtask queue for Promise jobs and other microtasks.
+# DO NOT TURN THIS ON BY DEFAULT WITHOUT THE BUGS BLOCKING
+# BUG 1990841 being fixed (especially Bug 1990842).
- name: javascript.options.use_js_microtask_queue
type: RelaxedAtomicBool
- value: true
+ value: false
# Changing this mid process will break invariants and crash, however
# making this mirror: once, and set_spidermonkey_pref: startup is
# broken: See Bug 1989094
