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Issue 873106 link

Starred by 1 user
Status: Assigned
Owner:
alph@chromium.org
Cc:
phanindra.mandapaka@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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DevTools shows negative time in scripting

Reported by n...@ioncube.com, Aug 10 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Steps to reproduce the problem:
What I am doing is:
1. Use ioncube24.com to display monitor results
2. Start performance profiling
3. Changing the time range shown for results, triggering chart redrawing and XHR requests.

What is the expected behavior?
I should see the amount of time spent in scripting as a positive number (and used to when last doing so a few weeks ago). 

What went wrong?
I see a negative time spent in scripting, a solid yellow region, a mangled doughnut chart, despite a large idle time.

Did this work before? Yes Uncertain, but probably wherever the current release was a month or two ago.

Chrome version: 68.0.3440.106  Channel: stable
OS Version: 10.0
Flash Version:
devtools-anomaly2.png
38.8 KB View Download
Profile-20180810T121221.json.gz
1.6 MB Download

Comment 1 by n...@ioncube.com, Aug 10 

Different profile, same result.
devtools-anomaly3.png
21.9 KB View Download

Comment 2 by swarnasree.mukkala@chromium.org, Aug 12

Labels: Needs-Triage-M68 Needs-Bisect

Comment 3 by kojii@chromium.org, Aug 13

Components: -Blink Platform>DevTools>Performance

Comment 4 by kozy@chromium.org, Aug 13

Owner: alph@chromium.org
Status: Assigned (was: Unconfirmed)

Comment 5 by phanindra.mandapaka@chromium.org, Aug 13

Cc: phanindra.mandapaka@chromium.org
Labels: Triaged-ET Needs-Feedback
Unable to reproduce the issue on reported chrome version 68.0.3440.106 using Windows 10. Attaching screen-cast for reference.
Steps: 
---------
1. Launched reported chrome 
2. Navigated the URL " ioncube24.com "
3. Opened Dev tools >> Performance Tab>>Started performance profiling and stopped 
As we are seen that scripting has a positive number

@Reporter: Could you please check the attached screen cast and please let us know if anything missed from our end. 

Thanks.!
873106.mp4
6.6 MB View Download

Comment 6 by n...@ioncube.com, Aug 13 

It happens on a specific view once logged in. I'll setup a test account, let some data accumulate if necessary and email login credentials.

Comment 7 by n...@ioncube.com, Aug 13 

Just emailed login details. Testing different versions using Browserstack, the issue appeared in version 65.

Comment 8 by n...@ioncube.com, Aug 17 

Full details per request:

To reproduce:

1) login with crtest / crtest873106

2) after interface loads, click on the chart (ignore any request to update profile)

3) On the monitors view, click F12 and start a performance recording

4) Wait a few seconds then on the chart change time range from 12 hours
to 6 hours.

5) Stop recording

The negative script time should then be evident.  I tested various
versions of Chrome on W10 over browserstack and the issue seems to have
appeared in 65 onwards.
►

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