Dear all, I just started to look into perturbation caused by instrumentation.To this end I measure the execution time of a function with and without instrumentation and compare the resulting distributions.
I attached 2 graphs: a.pdf: execution without any instrumentation b.pdf: execution with instrumentationI instrument the entry point of a function and add a call to a different, empty function. The function is called at a single location. I was wondering whether anyone can make a good guess about why there is a plateau at 4e-7 in b.pdf
Setting any of the set* function to non-default values, e.g. switching off delayed parsing, did not change anything. The behaviour is very reproducible.
There might be quite a few things going on here. But maybe someone can make an educated guess and point me at the right direction?
Marc
a.pdf
Description: Adobe PDF document
b.pdf
Description: Adobe PDF document
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