I found this issue specifically on Gmail. Just open Gmail and after a few seconds it starts to consume one whole core of CPU.

Soon after my previous comment I found a couple of Twitter pages were also inhabited, and they apparently only do this while being backgrounded.

for workaround problem is enough to open tabs one by one that caused the processor load.

Demonstration: https://youtu.be/-IgtIlBC2a0

Tested this manually, over installing the latest Dev(62.0.3188.4) over the previous Dev(62.0.3178.0) on Windows-7 with signed in Chrome account and didn't encounter any such CPU spike. Attached is the screenshot of the task manager.


mikhail.v.gavrilov@: Is this spike in CPU specific to any profile or happens with every profile? Try disabling extensions and see if there is any difference here.

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For me, CPU spiking and lagging happens (mostly) when dev tools is open.

I updated Chrome today and just after few hours I started noticing weird lagging while working (laggins is most noticeable when selecting an element on 'Elements' tab).

All extensions disabled and only 1 tab open (see screenshots).

I'll try downgrading when I have a chance.

In the meanwhile I tested with Vivaldi browser and, for example, selecting an element is much faster/snappier.
Vivaldi UA (Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.105 Safari/537.36 Vivaldi/1.92.917.43)

Okay, Vivaldi is based on Chromium, so it's not exactly the same but nevertheless.

Is there any logs/dumps we could provide to make diagnosing easier?

PS. I should also mention that my dev PC isn't really top notch, so slight drops on performance is usually quite noticeable to me.

Versions & UA:
62.0.3188.4 (Official Build) dev (64-bit) (cohort: Dev)
V8 6.2.265
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3188.4 Safari/537.36

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Same has been happening here, especially with sites like youtube. I tend to preopen like 5-6 or even more on a new page and just when I start a single video the CPU usage goes to 100% with each youtube page consuming a lot even though I haven't even loaded them.

Windows 10 (Build 14393.447)
Version 62.0.3188.4 (Official Build) dev (64-bit)

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Reporter@: Could you please confirm that the issue has resolved since the issue is in #62.0.3188.4 dev and latest dev got upgraded.
Thanks!

Yes, issue was gone.

Thank you for providing more feedback. Adding requester "ajha@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

As per Comment #11,marking this issue as Wont-Fix.
Thanks..