Bug 291796 – Loading TheGlobeAndMail.com, CNN.com, Kotaku.com is slower than in Firefox

• Status: NEW
• Component: WebKitGTK

[Jeff Fortin]

Created attachment 474965 [details]
comparison demonstration video - initial loading

This is the follow-up to bug #251336, but tested on GNOME 48 with Epiphany 48.0 (WebKitGTK 2.48.1), MiniBrowser, and Epiphany Canary.

Essentially,

/usr/libexec/webkitgtk-6.0/MiniBrowser --private https://www.theglobeandmail.com

or

epiphany --incognito-mode https://www.theglobeandmail.com

…is still slower than Firefox 137 (even with uBlock origin disabled in private navigation mode etc.), and that's on a 180 mbps fiber optics connection that has both IPv4 and IPv6.

Attaching a demonstration video; in there, you might notice that the "last third" of Epiphany's progressbar seems to hang the longest... and even reloading the page takes a long time, unlike Firefox which is instantaneous.

[Jeff Fortin]

Created attachment 474966 [details]
comparison demonstration video - reloading

[Jeff Fortin]

Created attachment 474967 [details]
Sysprof 48 capture

[Jeff Fortin]

Created attachment 474968 [details]
Sysprof screenshot - flame graph

[Jeff Fortin]

Created attachment 474969 [details]
Sysprof screenshot - marks

[Jeff Fortin]

I had to use this command to generate that sysprof capture:

`sysprof-cli --gtk -f --no-debuginfod -- epiphany --incognito-mode https://www.theglobeandmail.com`

…because at that time MiniBrowser absolutely refused to launch under sysprof.

[Jeff Fortin]

Other websites that are affected in the same way:

* https://www.CNN.com
* kotaku.com