Poor Scrolling Performance on Windows

[mikechambers]

I am seeing very poor scrolling performance on Windows 7 in Sprint 10 build (eaaab1b).

Basically, open a document, grab the scroll bar and drag it to a new position. There is a 1 (sometimes 2) second delay from the drag, until the editor content updates to the new scroll position.

I have a short video that shows this:

http://www.youtube.com/watch?v=ETDNtMj9JPk

Windows 7 (64 bit)
8 gigs ram
i5-2500k 3.3 ghz

[peterflynn]

Dropped repaints seem to be a general problem with the Windows version of CEF1. From what we've been able to tell, CEF3 no longer has this problem. If you want, you can try running Brackets in the brackets-shell wrapper to see if the problem goes away. (Caveats: the brackets-shell repo doesn't contain a binary, so you'll have to build it yourself or grab the copy stored on zerowong; and brackets-shell is still pretty buggy for now).

Tentatively tagging as a CEF issue for now.

[peterflynn]

See also issues #730, #362, #158

[peterflynn]

@mikechambers: closing since we have multiple other bugs tracking this issue. It should be fixed in the new brackets-shell native wrapper. If you want to verify that it's fixed, feel free to give it a spin!

[praneetloke]

This is fixed as of sprint-13. Tested on Windows.

[njx]

Nice, thanks for verifying.

[peterflynn]

@mikechambers: This should be further improved by #1847 (just merged), which might almost double our scrolling repaint FPS (on both platforms).