How pre-rendering a tile map improves performance

A game developer demonstrates how pre-rendering static tile maps dramatically improves rendering performance in a 2D game. By combining individual tiles into a single cached canvas image during initialization, render time for collidables dropped from 2ms to 0.33ms. The technique involves creating a complete map image once, then using a single draw call to render only the visible viewport area around the player, eliminating the need to loop through and draw individual tiles every frame. This optimization works for any static game elements that don't change during gameplay.