Re: [R] microbenchmark

I'm not sure why either, but here's a simpler (and much faster) illustration of the problem: library(microbenchmark) A <- matrix(1:9,3) replicate(10, microbenchmark(colMeans(A), times = 4)$time) replicate(10, microbenchmark(A, times = 4)$time) Hadley On Mon, Sep 16, 2013 at 8:11 AM, Christophe

[R] microbenchmark

Hi the list, I am using the function microbenchmark to measure the performance of some code. But I notice that the first execution of the code takes much longueur than the next executions. I compare it to several executions of the code : --- 8< -- A <- matrix(1:9,3) nbReroll <- 1000 te