Recently I have been working on porting an existing Unity game to macOS. It is a shoot-em-up called Blue Rider developed by Ravegan from Córdoba, Argentina. It was originally released on PC (Steam), XBox, Playstation 4, and Switch.
The main things I needed to work on to bring Blue Rider to macOS were the menu system, the resolution handling, the input handling, and some optimizations to achieve a smooth framerate.
(Note: I’m using Unity 5.6.7f1 since Blue Rider was written using a 5.x version. I’m not 100% sure, but based on the current documentation, I think what I’m doing here still applies with recent versions.)
One such optimization had to do with shaders. The game was hitching sometimes when an enemy appeared and when it exploded. It only seemed to happen some times and with some enemies.
I’ll explain what I found when I broke out the profiler and then I’ll provide one possible solution using ShaderVariantCollection.