Ubuntu
transcode package

Changed CFLAGS for a speed increase.

Bug #6003 reported by Yagisan on 2005-12-21

Affects		Status	Importance	Assigned to	Milestone
	transcode (Ubuntu)	Invalid	Medium	MOTU Media Team

Bug Description

Changed to CFLAGS from "-O2" to "-O2 -fweb -ffast-math -funswitch-loops -fgcse-after-reload -fomit-frame-pointer" for a small speed increase. Tested on amd64 and k7 machines.

Revision history for this message

Yagisan (yagisan) wrote on 2005-12-21: Patch to change the CFLAGS

Patch to change the CFLAGS Edit (982 bytes, text/plain)

This patch changes the CFLAGS in debian/rules to "-O2 -fweb -ffast-math -funswitch-loops -fgcse-after-reload -fomit-frame-pointer"

Daniel Holbach (dholbach) on 2005-12-22

Changed in transcode:
assignee:	nobody → motumedia

Yagisan (yagisan) on 2005-12-23

Changed in transcode:
assignee:	motumedia → slomo

Sebastian Dröge (slomo) on 2006-03-29

Changed in transcode:
assignee:	slomo → motumedia

Revision history for this message

Matthias Klose (doko) wrote on 2006-03-31:

- such changes have to be tested on non k7/amd64 hardware as well.
- "small" is a bit useless

Revision history for this message

Reinhard Tartler (siretart) wrote on 2006-03-31:

Yagisan: could you please provide numbers to the speed increase and provide perhaps a small testcase how to get these numbers? you could place this information somewhere in debian/ with a small comment how to use them.

If the speed increase is reproducible and significant, we could enable them for the tested architecture only. You cannot persume that the cflags you provide don't do any harm on other architectures.

Changed in transcode:
status:	Unconfirmed → Needs Info

Revision history for this message

Yagisan (yagisan) wrote on 2006-04-04:

Sure. When I finish getting my boxes rebuilt. IIRC it was a 1-5 fps increase.
All I have to test on here is an athlon64 2Ghz, duron 850Mhz, k6/2 333Mhz, and a pentium 2 233Mhz, so will obviously want some ppc, and newer intel boxes to test.

Revision history for this message

Vassilis Pandis (pandisv) wrote on 2007-02-01:

Can you please provide the information requested by Reinhard? Thanks.

Revision history for this message

Vassilis Pandis (pandisv) wrote on 2007-03-05:

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and don't hesitate to submit bug reports in the future.