EGCS vs GCC performance

[Richard Henderson]

On Tue, Jan 20, 1998 at 11:27:00AM +0200, Harvey J. Stein wrote:
> What about EV56s?

They have the same scheduling characteristics as ev5.

> And as of what date is the above the case?  With egcs-1.0 on redhat 4.2 I
> found egcs producing code which ran about the same as gcc 2.7.2.1,
> sometimes a little slower (-O2 -mcpu=21164).

The last tweeks went in on 971223.  Dunno what to tell you about
slowdowns -- if you can examine the differences between the two
executables and come up with theories on why it is slower in your
case we may be able to fix it.

> How much of
> a difference does -mcpu=21164 vs -mcpu=21164a make?

As always it depends on the program, but on code that does a lot
of character manipulation I've heard up to 20%.


r~