Emacs Non-Flickering Patch

Earlier today, Daniel Colascione merged his double-buffering Emacs display patch, and I was interested in seeing whether it reduced flickering when viewing animated GIFs on my problematic main machine.

And it sure does:

First you see an Emacs from five hours ago displaying a GIF, and it is flicker-o-rama.  Then I switch to a brand new Emacs with Daniel’s patch, and it is completely flicker-free.

Now, that the flicker was there in the first place is probably due to me not bothering to figure out what settings the Nvidia driver needs to … work better: On my laptop, there was no flickering even without Daniel’s fix.  So your mileage will vary, but it’s obviosly a major step forward, flicker wise, on some machines.  Thanks, Daniel.

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