1846110 - Too much time spent in CreateInterfaceObjects during sp3

Status: NEW

(Core :: DOM: Bindings (WebIDL), defect, P2)

Description

[Markus Stange [:mstange]]

0.3% of the entirety of Speedometer 3 is spent in CreateInterfaceObjects: https://share.firefox.dev/44G8RMq (370 samples)

Chrome spends half as much time in blink::V8ObjectConstructor::CreateInterfaceObject https://share.firefox.dev/3Ogq34g (168 samples)

These profiles were taken on macOS.

Comment 1

[Markus Stange [:mstange]]

Windows profiles:
Firefox: https://share.firefox.dev/3OgnfEl (704 samples)
Chrome: https://share.firefox.dev/3OyEgKZ (564 samples)

Comment 2

[Hsin-Yi Tsai (she/her) | away [:hsinyi]]

Edgar plans to take a quick look per the meeting discussion.

Comment 3

[Tooru Fujisawa [:arai]]

with the patch stack for bug 1850344 and related applied, the number of CreateInterfaceObjects sample is reduced from ~300 samples to ~200 samples locally.
The remaining things are mostly object handling (define property, create function object).

I'll check the impact for the startup (given the atomization is moved from each CreateInterfaceObjects to compile-time+startup)

Comment 4

[Edgar Chen [:edgar]]

(It seems that :arai is already working on this. Let me know if you need anything from my side.)