diff options
Diffstat (limited to 'Lib/timeit.py')
| -rw-r--r-- | Lib/timeit.py | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/Lib/timeit.py b/Lib/timeit.py index 0b5061f..38c2b1f 100644 --- a/Lib/timeit.py +++ b/Lib/timeit.py @@ -208,22 +208,23 @@ class Timer: def autorange(self, callback=None): """Return the number of loops so that total time >= 0.2. - Calls the timeit method with *number* set to successive powers of - ten (10, 100, 1000, ...) up to a maximum of one billion, until - the time taken is at least 0.2 second, or the maximum is reached. - Returns ``(number, time_taken)``. + Calls the timeit method with increasing numbers from the sequence + 1, 2, 5, 10, 20, 50, ... until the time taken is at least 0.2 + second. Returns (number, time_taken). If *callback* is given and is not None, it will be called after each trial with two arguments: ``callback(number, time_taken)``. """ - for i in range(0, 10): - number = 10**i - time_taken = self.timeit(number) - if callback: - callback(number, time_taken) - if time_taken >= 0.2: - break - return (number, time_taken) + i = 1 + while True: + for j in 1, 2, 5: + number = i * j + time_taken = self.timeit(number) + if callback: + callback(number, time_taken) + if time_taken >= 0.2: + return (number, time_taken) + i *= 10 def timeit(stmt="pass", setup="pass", timer=default_timer, number=default_number, globals=None): |