Ensure animation loop stops after raster tiles fade in

[lucaswoj]

PR #3532 introduced a bug wherein the render loop never stops when rendering raster tiles.

Raster tiles interact with the animation loop to allow them to fade in per raster-fade-duration.

This PR improves our handling of raster tile fading to prevent the animation loop from running continuously.

fixes #3757

Launch Checklist

• briefly describe the changes in this PR
• write tests for all new functionality
• post benchmark scores
• manually test the debug page

[friedbunny]

I REQUEST THAT I REVIEW THIS PR.

This was a joke.

[mourner]

Looks good, pending a fixed build (failing in source cache for some reason) and preferably some tests.

[lucaswoj]

Found the problem causing the unit tests to fail @mourner. Glad to see the unit tests are working 😅

[AndyMoreland]

Hey folks,

This PR looks like it addresses the high cpu usage we've been seeing lately on our map. This is causing pretty significant pain for us because our users tend to have several complicated maps running at once.

Do y'all have any notion of when you might release an 0.29.0? Happy to cherry-pick this onto the private fork that I deploy off of, but if you're planning on releasing soon I'll hold off since it's the holidays.

Totally understand if you don't want to discuss release schedules publicly but I figured I'd try asking :-).

Andy

[mollymerp]

Hi @AndyMoreland,
Glad this solves some issues for you! We don't have a finite schedule for the next release but we should have one out before the holidays.