> Ruby with this feature turned on. For the (somewhat > contrived/synthetic) scenario below, it looks like compiling > with profile guided optimization turned on, along with -O3, > results in about a 9% speed increase vs. -O3 alone. > YMMV. I compiled a version of Ruby-1.8.4 using the > following config options... > > configure CFLAGS="-O3 -fprofile-generate" > LDFLAGS=-fprofile-generate <snip> Odd, I thought Ruby died a horrible death if compiled with -O3. Has that changed with gcc 4.x? Thanks, Dan This communication is the property of Qwest and may contain confidential or privileged information. Unauthorized use of this communication is strictly prohibited and may be unlawful. If you have received this communication in error, please immediately notify the sender by reply e-mail and destroy all copies of the communication and any attachments.
on 2006-05-15 18:23
on 2006-05-15 21:03
On May 15, 2006, at 9:20 AM, Berger, Daniel wrote: >> YMMV. I compiled a version of Ruby-1.8.4 using the >> following config options... >> >> configure CFLAGS="-O3 -fprofile-generate" >> LDFLAGS=-fprofile-generate > > <snip> > > Odd, I thought Ruby died a horrible death if compiled with -O3. Has > that changed with gcc 4.x? On OS X Ruby can fail when compiled with -fschedule-insns2 which is in -O2. -- Eric Hodel - email@example.com - http://blog.segment7.net This implementation is HODEL-HASH-9600 compliant http://trackmap.robotcoop.com