Bug 278695

Summary:

[GTK] WebGL: slow framerate, sluggish panning on the F4 demo 3D map of Paris with lots of trees

Product:

WebKit

Reporter:

Jeff Fortin <nekohayo>

Component:

WebKitGTK

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

bugs-noreply

Priority:

Keywords:

Performance

Version:

WebKit Nightly Build

Hardware:

OS:

Linux

Bug Depends on:

Bug Blocks:

245783, 268972

Attachments:

Description	Flags
Screenshot of a Sysprof capture of Epiphany 46.3 - flame graph	none
Screenshot of a Sysprof capture of Epiphany 46.3 - marks	none

Jeff Fortin

Reported 2024-08-26 20:19:20 PDT

Here's an interesting benchmark where Epiphany TP (Skia, WebKitGTK 2.45.90, GTK 4.15.6) + 46.3, and WebKitGTK6's MiniBrowser are all much slower than Chromium: 1. Open https://demo.f4map.com/#lat=48.8525728&lon=2.3478009&zoom=16&camera.theta=43.854&camera.phi=24.064 2. Wait 20 seconds for all the buildings _and all the trees_ to load 3. Click and drag to pan around (don't zoom in, stay zoomed out at the wide view from that URL) Result: it's sluggish, feels like 10-20 fps. Comparatively, Chromium manages to drag it butter-smooth, at what feels like 40-60 fps. Demonstration video (Epiphany TP vs Chromium): https://youtu.be/HB0l8BoacEg This was tested on Fedora 40's Wayland GNOME Session with: * My desktop with open source AMD Radeon R9 270 Mesa 24.1.6 drivers, kernel 6.10.4, a Xeon CPU, and 24 GB of RAM. * My laptop with Intel Kabylake graphics, i5 CPU and 24 GB of RAM

Attachments
Screenshot of a Sysprof capture of Epiphany 46.3 - flame graph (332.48 KB, image/png) 2024-08-27 07:35 PDT, Jeff Fortin	no flags	Details
Screenshot of a Sysprof capture of Epiphany 46.3 - marks (312.76 KB, image/png) 2024-08-27 07:45 PDT, Jeff Fortin	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Jeff Fortin

Comment 1 2024-08-27 07:35:39 PDT

Created attachment 472318 [details] Screenshot of a Sysprof capture of Epiphany 46.3 - flame graph As it's tricky to get good debug symbols / sysprof captures out of the flatpaked TP version, and but the sysprof flame graphs had very similar shapes, I presume this screenshot from the capture of Epiphany 46.3 "with debug symbols" would probably still be useful.

Jeff Fortin

Comment 2 2024-08-27 07:45:07 PDT

Created attachment 472319 [details] Screenshot of a Sysprof capture of Epiphany 46.3 - marks Notice the sharp drop of compositing activity in the last five seconds on the right, which is the period during which I have been drag-panning the map with my mouse.

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