There's a few spots where vertex buffers are used. I also rely on ds_grids pretty often for a few different systems, like a master list of all the items ingame.

"da_map" I know how to type I swear, I'm just posting from mobile...

Oh yeah, debugger and YYC are my best friends in this. XD
I've been using YYC to squeeze all that extra performance out already, including setting the gml_release_mode() for an extra boost.
When GMRT is out of beta, migrating to it will likely be priority #1 for me.

I have a few really old PCs I've been performance testing on, and don't have any plans for Android/iOS releases since the control scheme would suck LOL
I'm mostly trying to get the recommended specs as low as possible, that way more people have the opportunity to play Angels & Demons in the end.

Ooooh I might have to make some changes then. I've been on an incredible optimization kick recently to (hopefully) allow my game to run better on older PCs/weaker devices. Thanks for sharing!

And I typo'd "In the Angels & Demons"
Yes, the ds_map is in the Angels & Demons, of course.

Read up on ds_maps here: manual.gamemaker.io/lts/en/GameM...

Further Reading: manual.gamemaker.io/lts/en/GameM...

Further reading: manual.gamemaker.io/lts/en/GameM...

There's a lot of good stuff related to the pragma function. Check out the docs for more details: manual.gamemaker.io/lts/en/GameM...