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2:54 PM

Hi @Matt

With respect to:

Q: Macbook Air screen drawing suddenly slow

This has been going on for a week or 2. Restarting seems to help because WindowServer is blowing up. But the problem keeps coming back. Specs: Macbook Air mid-2012, 8GB RAM, 2ghz i7 Yosemite 10.10.5 Chrome 49 Some symptoms that recently popped up: Page scrolling in Chrome is laggy. Turning...

Can we assume two things:

1. Memory pressure graph is green?

2. CPU idle is more than 50%?

I'd probably have an iostat 60 window running and paste in a line from when the slowness happens.

   18.74  63  1.15    10.35  55  0.56  12 13 75  3.79 2.23 2.06
          disk0           disk3       cpu     load average
    KB/t tps  MB/s     KB/t tps  MB/s  us sy id   1m   5m   15m

(I grabbed the line first and then appended the headers - since the first line is summary data and not delta...)

My guess is you are running into something blocking the javascript running for text input and scroll changing the rendering, but I'd like to rule out a busy system or other apps contending with the browser before getting into browser debugging