[CLOSED] Brackets becomes unresponsive when scrolling brackets.min.css

[core-ai-bot]

Issue by MarcelGerber
Friday Apr 10, 2015 at 23:45 GMT
Originally opened as adobe/brackets#10879

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1. In the Brackets repo, run grunt build to generate a new src/styles/brackets.min.css (I created mine based on a5a2cd53d5bf9486a3ebf33e715f991a4b3a4c3e)
2. Ensure View > Word Wrap is enabled
3. Open the aforementioned file in Brackets
4. Scroll all the way to the end

Result:
Sooner or later, Brackets freezes with the renderer process (not the main process) utilizing around 17-20% of CPU usage.

Windows 8.1, Brackets 1.2 Shell (official), a5a2cd53d5bf9486a3ebf33e715f991a4b3a4c3e.
I reproduced this with a vanilla version of Brackets, without any extensions and with all preferences set to their default (aka first launch).

[core-ai-bot]

Comment by MarcelGerber
Saturday Apr 11, 2015 at 00:38 GMT

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It's literally an issue with f3644f7e2a97265f8fe56fb37b7240e42edf8b3d. (I git bisected 3 times to find that, and double-checked the actual culprit, so yeah, it is).

[core-ai-bot]

Comment by le717
Saturday Apr 11, 2015 at 03:30 GMT

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If this is confirmed to be caused by that commit, I think you just won the weirdest bug origin award.

[core-ai-bot]

Comment by MarcelGerber
Saturday Apr 11, 2015 at 12:21 GMT

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There are others that qualify, like brackets-userland/brackets-git#436, but thanks :D

I guess there's something wrong with the way CM measures fonts, and then it's not too obscure.

[core-ai-bot]

Comment by MarcelGerber
Saturday Apr 11, 2015 at 13:12 GMT

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Interesting. Looking further into this issue, it does not repro when I disable the QuickView default extension.