Hi, there!

As Bert noticed a few weeks ago, fast-drag is kind of slow on MacOS.

Today, I noticed under Windows that there is an occasional, GC-like lag when
resizing windows with non-fast drag.

Here is the Trunk (Cog) with noticable lag:
http://i.giphy.com/26FPJdlJcZtI6fLO0.gif

Here is 4.6 (Cog) without lag:
http://i.giphy.com/l4Ki6nefX950k0qre.gif

The drawing code in Morphic has not changed. I suspect an issue in the VM.

Best,
Marcel



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