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1 """calculates your updates-per-second"""
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2
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3 import time
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4
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5 class Updatefreq:
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6 """make one of these, call update() on it as much as you want,
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7 and then float() or str() the object to learn the updates per second.
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8
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9 the samples param to __init__ specifies how many past updates will
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10 be stored. """
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11
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12 def __init__(self,samples=20):
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13 self.times=[0]
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14 self.samples=samples
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15
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16 def update(self):
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17
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18 """call this every time you do an update"""
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19 self.times=self.times[-self.samples:]
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20 self.times.append(time.time())
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21
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22 def __float__(self):
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23
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24 """a cheap algorithm, for now, which looks at the first and
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25 last times only"""
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26
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27 try:
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28 hz=len(self.times)/(self.times[-1]-self.times[0])
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29 except ZeroDivisionError:
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30 return 0
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31 return hz
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32 def __str__(self):
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33 return "%.2fHz"%float(self)
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