Genuine question: I imagine most data science things involve arrays of numbers, not just single numbers. JS has UInt8Array, i.e. it does kinda have integers if you want them in an array anyway. Can that speed things up?
In my case, it did involved reading binary files from ArrayBuffers where some attributes were stored as int64. I've been using DataView to read BigInt64s and then used those frequently. Was terribly slow. I've then reverted to alternatives wherever possible, e.g. immediately converting the BigInt64s to Numbers/Doubles where 53 bit integers were sufficient, or splitting down to two 32 bit integers and do some more involved bit magic on them. Much faster, but overall I wasn't happy with the whole process and complexity. I'd rather have native 64bit integer values in JS.
