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Issue 632372 link

Starred by 3 users
Status: Duplicate
Merged: issue 617792
Owner:
cbiesin...@chromium.org
Closed: Aug 2016
Cc:
█ lushnikov@chromium.org
einbinder@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug



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[devtools] opening snippets makes devtools slow

Project Member Reported by kayce@google.com, Jul 28 2016 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Steps to reproduce the problem:
1. Open Chrome 52.
2. Open DevTools.
3. Type something into console. Nice and smooth.
4. Create a new snippet. Watch the lag.
5. Try to resize the drawer or some panes. DevTools is slow.

What is the expected behavior?
DevTools stays snappy and smooth.

What went wrong?
Slowness.

Did this work before? Yes 

Chrome version: 52.0.2743.82  Channel: stable
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 22.0 r0

Appears to be working in Canary.

Comment 1 by addyo@google.com, Jul 28 2016 

Is this also present in Chrome Beta? If a regression was introduced in 52, I'm not currently seeing it in Canary either.

Comment 2 by kayce@google.com, Jul 28 2016 

Yup. Also in Beta. Made a GIF.
beta.gif
960 KB View Download
Project Member

Comment 3 by sheriffbot@chromium.org, Jul 29 2016

Labels: Hotlist-Google

Comment 4 by dgozman@chromium.org, Jul 29 2016

Cc: lushnikov@chromium.org
Owner: einbinder@chromium.org
Status: Assigned (was: Unconfirmed)

Comment 5 by einbinder@chromium.org, Aug 3 2016 

What model Mac are you using? I am having trouble reproducing the lag on mine.

Comment 6 by kayce@google.com, Aug 4 2016 

os x el capitan v 10.11.6
macbook pro mid 2014
processor: 2.2ghz intel core i7
memory: 16gb 1600 mhz ddr3
graphics: intel iris pro 1536mb

Comment 7 by lushnikov@chromium.org, Aug 4 2016

Labels: allpublic

Comment 8 by m...@mostlystatic.com, Aug 6 2016 

Not sure if it's helps, but here's a timeline recording I get when opening different Snippets on Stable.
timeline-click-through-snippets.json
6.7 MB View Download

Comment 9 by einbinder@chromium.org, Aug 8 2016

Owner: cbiesin...@chromium.org
The issue can be reproduced on stable by using a Mac, having sources open to a snippet, and having the sources sidebar NOT be set to snippets. It doesn't appear to be present in canary.

Bisect: https://chromium.googlesource.com/chromium/src/+log/717ee19a82bde7395ea138843b09a826b5681463..bd745c89802067c732b9858960cb4834e4b6b10d

It appears to be related to the flexbox change.

Comment 10 by cbiesin...@chromium.org, Aug 8 2016

Cc: einbinder@chromium.org
Hmm, I thought I fixed that in e31affc47d4167415327e54c48da086e9152ee10, which was merged to 52.0.2743.71. But I also had 7f6ee2762d0e5617c17ad828d6353424ca59bacd which was only merged to 53.0.2785.17

Can you reproduce this in Beta (v53)?

Comment 11 by einbinder@chromium.org, Aug 8 2016 

I can get it to lag on 51 and 52 but not 53.

Comment 12 by cbiesin...@chromium.org, Aug 8 2016

Mergedinto: 617792
Status: Duplicate (was: Assigned)
OK, then it was probably fixed by the latter checkin I assume. At this point, it is too late to fix anything for M52 I understand (see e.g. https://bugs.chromium.org/p/chromium/issues/detail?id=629491#c15)
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