Closes: sacckey#23 Having to call a proc for every memory access isn't ideal, that quite a bit of overhead. If instead we use a `case` statement with only immediate values and a few bitwise operations we can let YJIT generate very efficient code. two runs on main with ruby 3.4.1 / YJIT: ``` Ruby: 3.4.1 YJIT: true 1: 4.051815 sec 2: 3.989457 sec 3: 3.963555 sec FPS: 374.849216902501 Ruby: 3.4.1 YJIT: true 1: 3.872855 sec 2: 3.943231 sec 3: 4.024268 sec FPS: 380.05620440064547 ``` On this branch: ``` Ruby: 3.4.1 YJIT: true 1: 3.625805 sec 2: 3.615032 sec 3: 3.572852 sec FPS: 416.1392102177157 Ruby: 3.4.1 YJIT: true 1: 3.543953 sec 2: 3.520738 sec 3: 3.506004 sec FPS: 425.70521616601366 ```

Commits

Commits on Feb 10, 2025

Optimize Cartridge::Mbc1