Enable stencil-mvp by default
Categories
(Core :: JavaScript Engine, task, P1)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox86 | --- | fixed |
People
(Reporter: tcampbell, Assigned: tcampbell)
References
Details
(Keywords: perf-alert)
Attachments
(1 file)
|
(deleted),
text/x-phabricator-request
|
Details |
Placeholder bug for the pref-flip of javascript.options.use_off_thread_parse_global when we are ready.
|
Assignee | |
Comment 1•4 years ago
|
||
Flips the javascript.options.use_off_thread_parse_global pref to false.
This allows off-main-thread JS parsing to run even while the atoms-zone is
being GC'd. This fixes intermittent stalls where an incremental GC on
main-thread can cause large off-thread parse requests to go into wait queues
until the GC is finished.
This change is focused on addressing these intermittent stalls that are based
on particulars of GC timing. Different machines may or may not see stalls on
the same webpages.
Note that the system ScriptPreloader that runs during process startup still
uses an off-thread parse global. This bug is focused on improving the content
ScriptLoader during normal page-load.
|
||
Updated•4 years ago
|
|
||
Comment 3•4 years ago
|
||
| bugherder | ||
|
||
Comment 4•4 years ago
|
||
== Change summary for alert #28499 (as of Wed, 20 Jan 2021 09:14:44 GMT) ==
Regressions:
| Ratio | Suite | Test | Platform | Options | Absolute values (old vs new) |
|---|---|---|---|---|---|
| 3% | google-sheets | loadtime | linux64-shippable-qr | nocondprof warm webrender | 936.12 -> 965.25 |
Improvements:
| Ratio | Suite | Test | Platform | Options | Absolute values (old vs new) |
|---|---|---|---|---|---|
| 3% | bbc | LastVisualChange | android-hw-g5-7-0-arm7-api-16-shippable | nocondprof warm webrender | 3,097.17 -> 3,008.75 |
| 2% | loadtime | linux64-shippable | nocondprof warm | 581.96 -> 567.79 | |
| 2% | loadtime | linux64-shippable-qr | nocondprof warm webrender | 610.02 -> 595.38 | |
| 2% | loadtime | linux64-shippable | nocondprof warm | 582.19 -> 569.00 | |
| 2% | SpeedIndex | linux64-shippable | nocondprof warm | 805.38 -> 787.92 | |
| 2% | loadtime | android-hw-g5-7-0-arm7-api-16-shippable | nocondprof warm webrender | 2,249.10 -> 2,200.75 |
For up to date results, see: https://treeherder.mozilla.org/perfherder/alerts?id=28499
|
|
Assignee | |
Comment 5•4 years ago
|
||
Bug 1687602 will optimize this further and the google-sheets regression should turn into a improvement as well. I'll double check if there is anything to learn from that specific case though.
Description
•