You're right, point taken, I clearly misused the word; it has nothing to do with any personal opinion. I was using 'biased' thinking about its meaning on the Machine Learning context [1].

My intention was to state that idiomatic code is not necessarily the most performant one, and that the codes used in the benchmarks game may contain some not very idiomatic optimization codes [2].

That said, it tends to evaluate the implementation of a certain compiler, and not exactly how the constructs and concepts of those languages result on the measured performance.

1: http://en.wikipedia.org/wiki/Inductive_bias 2: http://shootout.alioth.debian.org/u32/benchmark.php?test=cha...