HiI've had this experience on a Unix machine that I thought was much more powerful than my Windows machine. On closer examination it seems the hardware was better at multitasking, but definitely not faster on single processes, so you might want to be careful about the part you think you know. I haven't had this experience running Windows and Linux on the same machine, but even then there are an enormous number of variable in the way you build R.
I'm observing a huge difference in the performance speed of R on Windows and Unix, even though I know that my Unix machine is much more powerful than my Win machine.
Paul Gilbert
In particular, any character processing task is very time consuming on Unix.
strptime(x,"%H:%M:%S") is about 10 times slower on Unix for vector x of the length of ~ 500. read.table() also is very slow. is there any way to speed up these ?
Thanks a lot, Vlad.
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