Bug 267774 – [GTK] Slow to load GMail's inbox (or search results)

• Status: NEW
• Component: WebKitGTK

[Jeff Fortin]

Created attachment 469460 [details]
Video demonstrating the issue

Symptoms: see attached video. On my desktop machine, it takes roughly 10-12 seconds for an already logged in GMail inbox to fully load and render, when launching as a web app (but loading seems similarly slow on a regular Epiphany window).

Testing parameters:

* Epiphany 45.1 installed from the Fedora 39 repositories (not flatpaked), on a SSD. Cache directories are also on a SSD.
* WebKitGTK 2.42.3, GStreamer 1.22.8
* Running in the Wayland version of GNOME Shell 45.3 on Fedora 39 (fully up to date)
* CPU: Intel® Xeon® W3520 × 8
* GPU: Radeon R9 270 running on Mesa 23.3.3
* Launching it as a web app, like this:  
 epiphany --application-mode \
 --profile="/home/your_username/.local/share/org.gnome.Epiphany.WebApp_BigHashHere" \
 "https://mail.google.com/mail/u/0/#search/gnome"
 
 I will attach sysprof captures (and convenience screenshots) and captures from the web inspector's timeline.

[Jeff Fortin]

Created attachment 469461 [details]
Web inspector timeline recording

[Jeff Fortin]

Created attachment 469462 [details]
Web inspector timeline recording - screenshot

[Jeff Fortin]

Created attachment 469463 [details]
sysprof recording

[Jeff Fortin]

Created attachment 469464 [details]
sysprof recording screenshot - entire flamegraph

[Jeff Fortin]

Created attachment 469465 [details]
sysprof recording screenshot - left portion of the flamegraph

[Jeff Fortin]

Created attachment 469466 [details]
sysprof recording screenshot - right portion of the flamegraph

[Jeff Fortin]

Created attachment 469467 [details]
sysprof recording screenshot - compositor marks

[Jeff Fortin]

For the record, this also happens on a laptop with an 8th-gen Intel "Kabylake" i5 8350U CPU and Intel UHD 620 graphics, so not caused by the Xeon/Radeon specifically.

Neither machine are running HiDPI screens, they use normal 1080p 60 Hz displays.