message: remove the isZero from newArray...
  an array is already passed as parameter (`b`), it is non-sense to
  create an array, from an array but not conserve the values of the
  original array. Use `newArray0` instead.
diff: -export const newArray = (module, b, isZero=false) => {
  +export const newArray = (module, b) => {
  const len = b.length;
  const ptr = module.alloc(len);
  let memory = new Uint8Array(module.memory.buffer);
  for (let i = 0; i < len; i++) {
  - memory[ptr+i] = isZero ? 0 : b[i];
  + memory[ptr+i] = b[i];
  }
  return ptr
  };
  