[Webkit-unassigned] [Bug 144107] Web Inspector: Inspector hangs when trying to view a large XHR resource

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144107

--- Comment #3 from Joseph Pecoraro <joepeck at webkit.org> ---
I created a test page that loads a 9MB JSON Resource (an Object with 300000 properties. 

Before my changes selecting the resource in Web Inspector's Resource sidebar we took about 10 seconds to show the resource with the UI being completely frozen for about 9s.

After, we load the resource in under 0.5s, with the UI being hung for maybe 100ms. Most of the time is loading the content from the backend. Formatting is done async in a worker. We avoid asking CodeMirror to layout multiple times. We avoid trying to create CodeMirror markers for colors/gradients etc.

I will use this bug for the final part of the work. Hooking up the async formatter in TextEditor/SourceCodeTextEditor.

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