Buffer.(read|write)(U)Int(LE|BE)(8|16|32)

[ronag]

Just adding something that I've been looking at which could maybe be improved.

Using Node Buffer vs Int32Array to read/write 32 bit values to buffers.

NAME                           REPS
-----------------------------------
Buffer                   64,553,382
Int32Array              174,148,855

const arrayBuffer = new ArrayBuffer(NUM_CASES * 4)
const buffer = Buffer.from(arrayBuffer)
const buffer32 = new Int32Array(arrayBuffer)

{
  Buffer: (index, value) => {
    buffer.writeInt32LE(value, index * 4)
    assert(buffer.readInt32LE(index * 4) === value)
  },
  Int32Array: (index, value) => {
    buffer32[index] = value
    assert(buffer32[index] === value)
  },
  DataView: () => {
    const c = cases[caseIndex]
    view.setInt32(caseIndex * 4, c, true)
    assert(view.getInt32(caseIndex * 4, true) === c)
    if (++caseIndex === NUM_CASES) {
      caseIndex = 0
    }
  },
}

[ronag]

Would using https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView help?

[ronag]

Buffer                   64,382,619
Int32Array              173,271,415
DataView                157,751,918

[ronag]

I was thinking maybe something like this could be faster:

class FasterBuffer extends FastBuffer {
  constructor(...args) {
    super(...args)
    this._view = new DataView(this.buffer, this.byteOffset, this.byteLength)
  }

  writeInt32LE(value, offset) {
    this._view.setInt32(offset, value, true)
  }

  readInt32LE(offset) {
    this._view.getInt32(offset, true)
  }
}