Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes: > - Improve fork/exec performance on 64 bit systems.
If fork/exec became faster, something else has slowed down noticeably on my 64-bit Vista system. Using a fairly fork-heavy build script as the benchmark (and running it when nothing needs to be re-built), 1.7.10 is about 25% slower. Switching to cygwin1.dll 1.7.9 speeds things up again (and I only changed the DLL; it seemed to work fine for this test at least). The "while [ 1 ]; do date; done | uniq -c" loop is about 15% faster with 1.7.10 though. Lines like these stand out in a quick look in the strace log (about 75 MB): 1172898 1173730 [main] sh 1484 child_copy: dll bss - hp 0xEC low 0x611FC000, high 0x61230770, res 1 Every 4-5 print of "child_copy: dll bss" starts with a big number like that (values in the 50000-100000 range are more common). Don't know if this is relevant... Magnus -- 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
