After reducing collision objects in previous article and optimize memory usage, I think it is time to do some pressure test. So the entire scene is frozen when spawning 1440 bullets. The profile info looks like: The profile shows that every access operation rely on ‘Type.getClassName’ function, because Entity object uses [Class => value] Map to store components in traditional ECS framework. But Reflect is very slow, it takes 18% execution time just for adding components to Entity. There is second part: Because Bullet Entity use…

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Recently I make a terrible mistake, create AABB collision rectangle for each tile, in my wip game. The collision system contains 3941 object and takes 63% of execution time. The debug draw looks like a spider web: The most straightforward method is merging small tiles into larger rectangle to reduce total collision object number. This problems is very similar to Algorithm for “healing” multiple rectangles into a smaller number of rectangles . The algorithm has to step: for each row combine continuous tiles into stripe shape…

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