A rather basic jsperf is here: https://jsperf.com/dataview-float-int
The results are that the u8 hack is equally slow in firefox and chrome (~90ops/sec), the DataView version is 10x faster in chrome(945ops/sec) but almost 4x slower in firefox(25ops/sec).
Chrome has improved DataView 2 years ago: https://v8.dev/blog/dataview
A rather basic jsperf is here: https://jsperf.com/dataview-float-int The results are that the u8 hack is equally slow in firefox and chrome (~90ops/sec), the DataView version is 10x faster in chrome(945ops/sec) but almost 4x slower in firefox(25ops/sec).