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# Benchmarks

Those benchmarks have been done with all data already in cache using a Intel Xeon E5520 @ 2.27GHz running Debian 7.

Execution time for reading a file, benchmarked using the ``timeit’’ module.
FabIO module | Filename | Size | Py2.7 v0.1.4 | Py2.7 v0.2.0 | Py3.2 v0.2.0
adscimage | mb_LP_1_001.img | 9 Mpix | 1.16 s | 1.12 s | 2.67 s
brukerimage | Cr8F8140k103.0026 | 256kpix | 796 µs | 795 µs | 1.43 ms
cbfimage | run2_1_00148.cbf | 6 Mpix | 173 ms | 70.8 ms | 70.8 ms
edfimage | F2K_Seb_Lyso0675.edf | 4 Mpix | 512 µs | 597 µs | 595 µs
fit2dmaskimage | fit2d_click.msk | 1 Mpix | 30.4 ms | 30.5 ms | 28.4 ms
GEimage | GE_aSI_detector_image_1529 | 4 Mpix | 5.37 ms | 5.44 ms | 4.3 ms
kcdimage | i01f0001.kcd | 360kpix | 130 ms | 121 ms | 292 ms
mar345image | example.mar2300 | 5 Mpix | 78 ms | 77 ms | 77 ms
marccdimage | corkcont2_H_0089.mccd | 4 Mpix | 9.28 ms | 9.01 ms | 17.2 ms
OXDimage | b191_1_9_1.img | 256kpix | 5.75 ms | 5.67 ms | 8.35 ms
pnmimage | image0001.pgm | 1 Mpix | 3.29 ms | 3.25 ms | 5.71 ms
raxisimage | mgzn-20hpt.img | 3 Mpix | 53.5 ms | 57.1 ms | 69.2 ms
tifimage | oPPA_5grains_0001.tif | 4 Mpix | 59.9 ms | 58.4 ms | 105 ms
xsdimage | XSDataImage.xml | 256kpix | 13.3 ms | 12.9 ms | 18.4 ms

The Python3 version is sometimes twice slower then the Python2 version. As the codebase is the same this regression is not due to FabIO but to the programming language itself.

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