Function getScratchArrayBuffer

docs/tests/v2/es6/js/sanddance.js:13963–13969

(byteLength)

var arrayBuffer = null;

function getScratchArrayBuffer(byteLength) {
  if (!arrayBuffer || arrayBuffer.byteLength < byteLength) {
    arrayBuffer = new ArrayBuffer(byteLength);
  }

  return arrayBuffer;
}

function getScratchArray(Type, length) {
  var scratchArrayBuffer = getScratchArrayBuffer(Type.BYTES_PER_ELEMENT * length);