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View Code? Open in Web Editor NEWcopy of ministat from dragonflybsd
copy of ministat from dragonflybsd
A small tool to do the statistics legwork on benchmarks etc. Prepare your data into two files, one number per line run ./ministat data_before data_after and see what it says. You need at least three data points in each data set, but the more you have the better your result generally gets. Here are two typical outputs: x _1 + _2 +--------------------------------------------------------------------------+ |x + x+ x x x + ++ | | |_________|______AM_______________|__A___________M_______________|| +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 5 36060 36138 36107 36105.6 31.165686 + 5 36084 36187 36163 36142.6 49.952978 No difference proven at 95.0% confidence Here nothing can be concluded from the numbers. It _may_ be possible to prove something if many more measurements are made, but with only five measurements, nothing is proven. x _1 + _2 +--------------------------------------------------------------------------+ | + | | x + +| |x x x x + +| | |_______________A_____M_________| |_M___A____| | +--------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 5 0.133 0.137 0.136 0.1354 0.0015165751 + 5 0.139 0.14 0.139 0.1394 0.00054772256 Difference at 95.0% confidence 0.004 +/- 0.00166288 2.95421% +/- 1.22812% (Student's t, pooled s = 0.00114018) Here we have a clearcut difference, not very big, but clear and unambiguous.
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