Function addRemoveCallback

packages/zone.js/example/benchmarks/event_emitter.js:26–45

(reuse, useZone)

}

function addRemoveCallback(reuse, useZone) {
  const start = new Date();
  let callback = callbacks[0];
  for (let i = 0; i < size; i++) {
    const emitter = emitters[i];
    if (!reuse) callback = callbacks[i];
    if (useZone) emitter.on('msg', callback);
    else emitter.__zone_symbol__addListener('msg', callback);
  }

  for (let i = 0; i < size; i++) {
    const emitter = emitters[i];
    if (!reuse) callback = callbacks[i];
    if (useZone) emitter.removeListener('msg', callback);
    else emitter.__zone_symbol__removeListener('msg', callback);
  }
  const end = new Date();
  console.log(useZone ? 'use zone' : 'native', reuse ? 'reuse' : 'new');
  console.log('Execution time: %dms', end - start);
}

addRemoveCallback(false, false);
addRemoveCallback(false, true);