| |
| from time import time |
|
|
|
|
| class TimerError(Exception): |
|
|
| def __init__(self, message): |
| self.message = message |
| super().__init__(message) |
|
|
|
|
| class Timer: |
| """A flexible Timer class. |
| |
| Examples: |
| >>> import time |
| >>> import mmcv |
| >>> with mmcv.Timer(): |
| >>> # simulate a code block that will run for 1s |
| >>> time.sleep(1) |
| 1.000 |
| >>> with mmcv.Timer(print_tmpl='it takes {:.1f} seconds'): |
| >>> # simulate a code block that will run for 1s |
| >>> time.sleep(1) |
| it takes 1.0 seconds |
| >>> timer = mmcv.Timer() |
| >>> time.sleep(0.5) |
| >>> print(timer.since_start()) |
| 0.500 |
| >>> time.sleep(0.5) |
| >>> print(timer.since_last_check()) |
| 0.500 |
| >>> print(timer.since_start()) |
| 1.000 |
| """ |
|
|
| def __init__(self, start=True, print_tmpl=None): |
| self._is_running = False |
| self.print_tmpl = print_tmpl if print_tmpl else '{:.3f}' |
| if start: |
| self.start() |
|
|
| @property |
| def is_running(self): |
| """bool: indicate whether the timer is running""" |
| return self._is_running |
|
|
| def __enter__(self): |
| self.start() |
| return self |
|
|
| def __exit__(self, type, value, traceback): |
| print(self.print_tmpl.format(self.since_last_check())) |
| self._is_running = False |
|
|
| def start(self): |
| """Start the timer.""" |
| if not self._is_running: |
| self._t_start = time() |
| self._is_running = True |
| self._t_last = time() |
|
|
| def since_start(self): |
| """Total time since the timer is started. |
| |
| Returns: |
| float: Time in seconds. |
| """ |
| if not self._is_running: |
| raise TimerError('timer is not running') |
| self._t_last = time() |
| return self._t_last - self._t_start |
|
|
| def since_last_check(self): |
| """Time since the last checking. |
| |
| Either :func:`since_start` or :func:`since_last_check` is a checking |
| operation. |
| |
| Returns: |
| float: Time in seconds. |
| """ |
| if not self._is_running: |
| raise TimerError('timer is not running') |
| dur = time() - self._t_last |
| self._t_last = time() |
| return dur |
|
|
|
|
| _g_timers = {} |
|
|
|
|
| def check_time(timer_id): |
| """Add check points in a single line. |
| |
| This method is suitable for running a task on a list of items. A timer will |
| be registered when the method is called for the first time. |
| |
| Examples: |
| >>> import time |
| >>> import mmcv |
| >>> for i in range(1, 6): |
| >>> # simulate a code block |
| >>> time.sleep(i) |
| >>> mmcv.check_time('task1') |
| 2.000 |
| 3.000 |
| 4.000 |
| 5.000 |
| |
| Args: |
| str: Timer identifier. |
| """ |
| if timer_id not in _g_timers: |
| _g_timers[timer_id] = Timer() |
| return 0 |
| else: |
| return _g_timers[timer_id].since_last_check() |
|
|
