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switch to a deque

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this makes more of the data structure someone else's responsibility and
probably improves performance too (but I didn't measure)
This commit is contained in:
Jean-Paul Calderone 2022-03-18 10:41:33 -04:00
parent b83b6adfbc
commit 32e88e580b
1 changed files with 3 additions and 3 deletions
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6
src/allmydata/stats.py
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@ -1,6 +1,8 @@
"""
Ported to Python 3.
"""
from collections import deque
from time import process_time
import time
@ -26,7 +28,7 @@ class CPUUsageMonitor(service.MultiService):
# up.
self.initial_cpu = 0.0 # just in case
eventually(self._set_initial_cpu)
self.samples = []
self.samples: list[tuple[float, float]] = deque([], self.HISTORY_LENGTH)
# we provide 1min, 5min, and 15min moving averages
TimerService(self.POLL_INTERVAL, self.check).setServiceParent(self)
@ -37,8 +39,6 @@ class CPUUsageMonitor(service.MultiService):
now_wall = time.time()
now_cpu = process_time()
self.samples.append( (now_wall, now_cpu) )
while len(self.samples) > self.HISTORY_LENGTH+1:
self.samples.pop(0)
def _average_N_minutes(self, size):
if len(self.samples) < size+1: