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AccuracyTests.md

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Accuracy test

This file summarizes accuracy test for loops of constant duration using the oclock.Timer class. Tests are done using the performance_test function (see Readme.md), e.g.

from oclock.performance import performance_test
performance_test(dt=0.1, nloops=1000, fmax=0.5, plot=True, precise=True)

Below are some results on timing accuracy in an Unix Environment (MacOS) and Windows, using nloops=1000, fmax=0.5 for various values of dt. Regular Timer means with precise=False while Precise Timer means with precise=True.

Unix

Regular Timer

Requested dt (ms) 1000 100 40 10 1
average dt - requested dt (ms) 0.0012 0.00012 0.00016 0.00005 0.00023
standard deviation in dt (ms) 0.48 0.36 0.31 0.23 0.08

Corresponding graphs:

Precise Timer

Requested dt (ms) 1000 100 40 10 1
average dt - requested dt (ms) 3.6E-5 3.4E-5 2.8E-5 3.0E-5 1.2E-5
standard deviation in dt (ms) 0.0118 0.0104 0.0117 0.0105 0.0073

Windows

Regular Timer

Requested dt (ms) 1000 100 40 10 1
average dt - requested dt (ms) 0.014 0.0015 0.0013 1.2 1.1
standard deviation in dt (ms) 7.0 7.1 7.0 5.6 1.9

Precise Timer

Requested dt (ms) 1000 100 40 10 1
average dt - requested dt (ms) 1.3E-5 1.5E-5 1.6E-5 6.7E-6 1.5E-6
standard deviation in dt (ms) 0.0066 0.0100 0.0088 0.0068 0.0036