Bisect Info:
===========
Good build : 60.0.3111.0,  Revision Range - 474651
Bad build  : 60.0.3112.0,  Revision Range - 474897

After executing the per-revision bisect script , i got the following CL's between good and bad build versions
===========================================
https://chromium.googlesource.com/chromium/src/+log/4a21fd7fbad35d3105789fddd733b5e9a723ffaa..13157f21a3e66cad40850e65c741795144817f2f

From the above CL suspecting the below change
---------------------------
https://chromium.googlesource.com/chromium/src/+/13157f21a3e66cad40850e65c741795144817f2f


dschuyler@- Could you please look into this issue, if it's related to your change?  if not could you please help us to reassign this issue to the right owner.

When I test this on Ubuntu on a specialist machine (which should be fast), the tooltip is slow with or without that CL. I suspect that https://chromium.googlesource.com/chromium/src/+/13157f21a3e66cad40850e65c741795144817f2f is not the culprit.

By slow, I mean that about half the tooltip will show up after a reasonable timer, and then a moment later the remainder of the tooltip will appear. E.g. if the tool tip were:

  Apples and Oranges

I'd see

  Apples An

And then a moment later, see

  Apples and Oranges

dpapad@ wdyt? Or do you know if someone is already looking into this?

This looks like a Blink bug to me, in which case a minimal repro example could be useful. My other guess would be that some background code is turning off/on "overflow: hidden", but looking at the video, I don't think this is likely (there is no page animation happening).

Un-assigning myself. Feel free to pick up if you want to investigate a Blink minimal repro (or disprove the Blink bug theory). To my knowledge nobody is looking into this issue currently.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

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

@johntlee: I recall you had mentioned potentially turning off the delay for all paper-tooltips.

We can, but this looks like a separate issue. Looking at the video and comment #2, this bug is about how the tooltip would initially transition in cropped, with an actual chunk of the tooltip missing. 

I'm unable to reproduce this currently.

> I'm unable to reproduce this currently.

Perhaps this was fixed after the removal of page/subpage animations from  issue 907333 ? Either way, feel free to close this as WontFix if the issue is no longer reproducible.