1378964 - Startup of Inspector is extremely slow

Status: RESOLVED FIXED

(DevTools :: Inspector, defect, P3)

Description

[Sebastian Zartner [:sebo]]

On my (admittedly quite slow) laptop it sometimes takes up to 20 to 30 seconds until the Inspector is loaded.

You can see each UI being loaded separatedly, first the toolbox opens, then the main panel, then the side panel, then the node view is filled with the nodes, then the selected element highlighted and finally the side panel is filled according to the selected node.

The performance of those steps needs to be improved.

Sebastian

Comment 1

[Alexandre Poirot [:ochameau]]

I landed various patches to improve inspector load speed against a simple document.

Is it better for you? (Ensure testing with Firefox 57 or 58)

Comment 2

[Sebastian Zartner [:sebo]]

Sorry for the delay, Alexandre!

I tested right now with the release version of 56.0 and also with 58.0a1 (2017-10-01) for some minutes. Both fully load the Inspector on https://www.mozilla.org/en-US/ in about 4 to 5 seconds now. So, it indeed seems to be faster.
Having said that, I assume your changes didn't make it into 56, right?

Sebastian

Comment 3

[Jan Honza Odvarko [:Honza] (always need-info? me)]

Sebastian, is opening of the Inspetor faster now? Should we close this bug?

Comment 4

[Sebastian Zartner [:sebo]]

Yes, it feels sufficiently fast now. There are still cases in which the display of the tree view takes some time, though generally it's fine. When I can pinpoint such cases, I'll create separate issues for that.

Thank you!

Sebastian