| 1 |
Dan Pasanen wrote: |
| 2 |
> Ok, im not too sure about this, but i was wondering, i have dual core |
| 3 |
> turion64's should that affect if im running -O2 or -O3? currently im |
| 4 |
> running -O2. and if i did change it to -O3, what, if anything should |
| 5 |
> i recompile? |
| 6 |
|
| 7 |
>From gcc man page: |
| 8 |
|
| 9 |
-O3 Optimize yet more. -O3 turns on all optimizations specified by -O2 |
| 10 |
and also turns on the -finline-functions, -funswitch-loops and |
| 11 |
-fgcse-after-reload options. |
| 12 |
|
| 13 |
|
| 14 |
So "-O3" is adding 3 more optimization flags to the bunch of flags "-O2" |
| 15 |
brings. I thing it is reasonable to doubt that a program compiled with |
| 16 |
"-O3" would greatly outperform the same program compiled with "-O2". The |
| 17 |
same logic is applicable about stability. I have to admit that my logic |
| 18 |
here is a plain arithmetic of type: "1 lemon - 10 cents, 10 lemons - 100 |
| 19 |
cents". There are programmers here who's opinion should be respected if |
| 20 |
it differs from this logic. |
| 21 |
|
| 22 |
-- |
| 23 |
Best regards, |
| 24 |
Daniel |
| 25 |
|
| 26 |
|
| 27 |
-- |
| 28 |
gentoo-amd64@g.o mailing list |
Archives