Как узнать время выполнения задач celery?

from time import time as timer


def perfomance():
  if request.method == 'GET':
    start = timer()
    results = []
    for path in glob.glob('/home/alenorze/Workspace/Django/hair_backend/test_data/*.jpeg'):
      task = create_mask.delay(path)
      result = AsyncResult(task.id)
      results.append(result)
    end = timer()
    time = end - start
  return render_template('ex.html', time=time, result=result)