1545958 - Large time spent in JS on scrolling alacrangroup.com (Was:Slow frames detected on alacrangroup.com)

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect, P3)

Description

[Asif Youssuff]

Seeing the animation after enabling gfx.webrender.debug.slow-frame-indicator on https://alacrangroup.com/

Profile: https://perfht.ml/2ZqrvXh

Slow Frame #01 Frame 107(https://alacrangroup.com/) CONTENT_FRAME_TIME 6635 - Transaction start 7.831596, main-thread time 10.116855, full paint time 10.588154, Skipped composites 0, Composite start 18.531712, Resource upload time 3.726880, GPU cache upload time 0.056888, Render time 31.015479, Composite time 1072.746931
Slow Frame #02 Frame 106(https://alacrangroup.com/) CONTENT_FRAME_TIME 6546 - Transaction start 7.502227, main-thread time 11.827501, full paint time 12.435709, Skipped composites 0, Composite start 22.622625, Resource upload time 1.800595, GPU cache upload time 0.130723, Render time 1057.999612, Composite time 1058.734194
Slow Frame #03 Frame 7(about:newtab) CONTENT_FRAME_TIME 5732 - Transaction start 0.044362, main-thread time 2.131055, full paint time 955.210318, Skipped composites 0, Composite start 938.194787, Resource upload time 0.000286, GPU cache upload time 0.143742, Render time 16.469377, Composite time 16.920156
Slow Frame #04 Frame 110(https://alacrangroup.com/) CONTENT_FRAME_TIME 2701 - Transaction start 4.735327, main-thread time 10.080618, full paint time 46.122717, Skipped composites 0, Composite start 64.308719, Resource upload time 1.911166, GPU cache upload time 0.044735, Render time 385.303953, Composite time 385.794274
Slow Frame #05 Frame 111(https://alacrangroup.com/) CONTENT_FRAME_TIME 2402 - Transaction start 8.380356, main-thread time 11.383760, full paint time 11.985935, Skipped composites 0, Composite start 32.047897, Resource upload time 3.269142, GPU cache upload time 0.053000, Render time 14.516528, Composite time 368.084715
Slow Frame #06 Frame 8(about:newtab) CONTENT_FRAME_TIME 1732 - Transaction start 0.080875, main-thread time 7.802144, full paint time 288.480388, Skipped composites 0, Composite start 169.148829, Resource upload time 2.366457, GPU cache upload time 0.043904, Render time 118.638584, Composite time 119.242506
Slow Frame #07 Frame 243(https://alacrangroup.com/) CONTENT_FRAME_TIME 1732 - Transaction start 14.568056, main-thread time 17.981460, full paint time 274.023964, Skipped composites 0, Composite start 169.173176, Resource upload time 2.366457, GPU cache upload time 0.043904, Render time 118.638584, Composite time 119.242506
Slow Frame #08 Frame 241(https://alacrangroup.com/) CONTENT_FRAME_TIME 1509 - Transaction start 7.230944, main-thread time 11.089700, full paint time 11.574136, Skipped composites 0, Composite start 18.909139, Resource upload time 4.330021, GPU cache upload time 0.122885, Render time 164.171358, Composite time 232.419349
Slow Frame #09 Frame 242(https://alacrangroup.com/) CONTENT_FRAME_TIME 1123 - Transaction start 4.745910, main-thread time 10.072424, full paint time 10.624167, Skipped composites 0, Composite start 15.891084, Resource upload time 2.702122, GPU cache upload time 0.071693, Render time 32.306190, Composite time 171.158591
Slow Frame #10 Frame 187(https://alacrangroup.com/) CONTENT_FRAME_TIME 1009 - Transaction start 4.792485, main-thread time 11.994659, full paint time 12.500274, Skipped composites 0, Composite start 25.769525, Resource upload time 4.487511, GPU cache upload time 0.046421, Render time 53.036736, Composite time 135.885693

Comment 1

[Mayank Bansal]

This appears to be mostly JS now : https://share.firefox.dev/3SosoLA
the page itself scrolls smooth.

Comment 2

[Mayank Bansal]

this is smooth now: https://share.firefox.dev/3M5MPLu