Re: gcc -pipe

[Kinkie]

On Wed, Oct 28, 2009 at 8:19 PM, Henrik Nordstrom
hen...@henriknordstrom.net wrote:
 ons 2009-10-28 klockan 18:09 +0100 skrev Kinkie:

 We can try and add an explicit configure check if needed (I'd have
 liked to avoid it, but we can probably just copy/paste).
 -jsomething is IMO slightly more confusing when troubleshooting a
 build as the output lines may get intermixed. -pipe doesn't suffer
 from this.

 Well, -pipe alone can't saturate any cpu with more than 2 threads.
 Probably not even 1 for that matter..

 and if I get a build problem then I run make without -j to get a better
 error report if the first result is not obvious.

trunk revno 10075 contains a configure test for gcc/g++ -pipe,
enabling it if it's found working.
Performance gain is probably not much, but it won't hurt either :)

It can probably be easily backported to 3.1 too.

-- 
/kinkie

Re: gcc -pipe

[Henrik Nordstrom]

tis 2009-11-03 klockan 14:59 +0100 skrev Kinkie:

 Performance gain is probably not much, but it won't hurt either :)

Some says it hurts, but that's probably in low-memory conditions.

Regards
Henrik

Re: gcc -pipe

[Kinkie]

Let's see the effects on the farm builds :) rolling back is easy if it
doesn't help

On 11/3/09, Henrik Nordstrom hen...@henriknordstrom.net wrote:
 tis 2009-11-03 klockan 14:59 +0100 skrev Kinkie:

 Performance gain is probably not much, but it won't hurt either :)

 Some says it hurts, but that's probably in low-memory conditions.

 Regards
 Henrik




-- 
/kinkie