PS. So I went ahead and repeated the tr test on an older (Intel Core 2 Quad 2.66 GHz) machine with cygwin 1.5 on Windows *32-bit*:
$ time -p for ((i=1; i<100; i++)); do var=$(echo $i | tr [a-z] [A-Z]); done real 2.64 user 6.56 sys 1.85 We're talking about a difference between an Intel processor ONE GENERATION OLDER, on an older version of cygwin, yet being a few times FASTER. On Wed, June 24, 2009 21:49, Edward Lam wrote: > On Wed, June 24, 2009 17:29, Larry Hall (Cygwin) wrote: >> Sure, we all know that Cygwin provides Linux emulation and suffers some >> overhead for it. But timings from an individual machine can be >> misleading. >> Running this through multiple times for both Mingw and Cygwin 1.7 on my >> similarly equipped machine, I see Cygwin is somewhere between 1.7 and >> 2.25 >> times slower. Whether yours or my result is more typical, I can't say. >> But as you noted, neither data set provides much justification for the >> results reported. > > Larry, > > Are you on 32-bit Windows or 64-bit Windows? I've noted on this mailing > list earlier that there are large speed differences between the two. I > wonder which platform Gene is on. The tr test results are consistent on > Windows 64-bit for me. > > I don't quite understand what MINGW32 is doing that makes it ~2 times > faster than cygwin. > > -Edward > > > > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
