The reason this improves performance is documented at https://blog.mozilla.org/javascript/2013/11/07/efficient-float32-arithmetic-in-javascript/ https://blog.mo

The reason this improves performance is documented at https://blog.mozilla.org/javascript/2013/11/07/efficient-float32-arithmetic-in-javascript/ https://blog.mozilla.org/javascript/2013/11/07/efficient-flo... - float32 typed arrays and more efficient emulation of C++ float32 arithmetic seem to be the main things.