Does making the mesh non-collidable reduce lag and make the game smoother and easier to run?
This is false. Having the CanCollide property disabled will not improve performance.
Improving Game Performance: https://developer.roblox.com/en-us/articles/Improving-Performance
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From @Crazedbrick1’s link:
If meshes in your game are expected to be collided with (by moving objects or players) then yes, this would improve performance. The difference would likely only be slight (unless you have thousands of collision surfaces causing the majority of lag in your game, in which case the difference would be significant), meaning this wouldn’t completely cure your game of lag, but it would at least make a small contribution.
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