For information purposes:
I tested previews and exports with the following versions of C2 and NW.
(r190, r192, and r193) + NW 11.5 = still stuttering.
I reverted back to NW 10.5 (Win 32bit) and it's smooth again.
32 gb ram
nvidia gtx650 ti
These are just my findings, though I am curious of others results as well
Thanks for testing and sharing.
I looked at the changelog and it seems pretty minor, just two changes listed:
Fix: Normal frame should not simulate user input events (File input dialog)
Fix: crash in debug session of WebStorm (WEB-14378)
I am a bit curious what that first change means exactly. Anybody here understand the platform well enough to explain?