JuliaLang/julia — pull request #1814 by shabbychef (2012-12-21 21:23:17+00:00)
Title: Matlab & R benchmark codes were semantically incorrect

Matlab and R both fill matrices in column order, while the example Mandelbroit code was computing values in row order, then filling them in column order, resulting in mangled images. This certainly _has no effect on relative timing._ However, I would argue that these implementations are not written in idiomatic Matlab or R, and a proper rewrite likely _will_ effect timing. For the case of Matlab, a quick rewrite of ```mandelperf``` to compute the Mandelbroit set on the entire matrix at a time results in a 4x speedup of the code.

While I understand that comparative benchmarking always opens one to accusations of strawmen, it seems like Julia should be compared to the best that Matlab and R have to offer.