1071773 - [e10s] Sideways scrolling in large text files does not work well (using trackpad)

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Andrew McCreight [:mccr8]]

This is kind of a weird issue I have noticed in e10s while scrolling very large text files like TBPL logs.
  WARNING: very large log. https://tbpl.mozilla.org/php/getParsedLog.php?id=48622304&tree=Try&full=1#error0

When I open this up in non-e10s mode, and go down to the middle of the file somewhere, using my Macbook Pro's trackpad thing I can easily scroll sideways.  However, in e10s mode, it will often get "stuck" when I try to scroll sideways, until I scroll up or down a little, then it will work.  It feels like it is incorrectly computing the width when deciding if it can scroll or not.

I'm spending a lot of time looking at large TBPL logs so this is pretty annoying, but I'm not sure how common of a use case this is.

Comment 1

[Andrew McCreight [:mccr8]]

Bill said this sounded like it could be a layout issue, so I'll move it there.

Comment 2

[Daniel Holbert [:dholbert]]

Can you reproduce this by e.g. scrolling with arrow keys, too, or does it only happen with trackpad scrolling?

Comment 3

[Andrew McCreight [:mccr8]]

Just trackpad.  As Jim marked the dependency, this could be a gestures problem or something and not really layout.  Felipe had a theory that the scrolling was being interpreted as navigation or something.

Comment 4

[ovidiu boca[:Ovidiu]]

Hi Andrew, 
The url that you provided is not working, can you please attached another link, if you can still reproduce this. Thank you

Comment 5

[Andrew McCreight [:mccr8]]

I haven't noticed this issue recently, but maybe TreeHerder logs just aren't as wide any more.