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ldaniel/R_compiler.R

Last active December 3, 2019 00:07
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R_compiler.R
install.packages("rbenchmark")
library(compiler)
library(rbenchmark)
enableJIT(level = 3)
#enableJIT(level = 0)
my_mean = function(x) {
total = 0
n = length(x)
for(i in 1:n)
total = total + x[i]/n
total
}
cmp_mean = cmpfun(my_mean)
x = rnorm(100)
benchmark(my_mean(x), cmp_mean(x), mean(x),
columns=c("test", "elapsed", "relative"),
order="relative", replications=5000)
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