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Minecraft back in the day was a Java applet, so the game was running in a native JVM. This demo is running the game in a WebAssembly JVM, so performance is absolutely going to suffer. If the game were actually written for the web platform, it would perform significantly better.


well Wasm had the promise of giving near native speed, but since they still don't offer direct write/share of memory it results in abysmal FPS.


This is a 20-ish year old game. It really shouldn’t matter.




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