Hello John,
Thursday, January 19, 2006, 4:42:47 AM, you wrote:
sorry, with the gcc -O3 -ffast-math -fstrict-aliasing -funroll-loops
the C version is 50 times faster than best Haskell one... it's the
loop from C version:
JM I believe something similar to what I noted here is the culprit:
JM
John Meacham wrote:
On Wed, Jan 18, 2006 at 06:18:29PM +0300, Bulat Ziganshin wrote:
:) even C version performs only 20 millions of additions in one second
because this program is most limited by memory throughput - it access
to 24 memory bytes per each addition. GHC just can't produce simple
John Meacham wrote:
On Wed, Jan 18, 2006 at 08:54:43PM +0300, Bulat Ziganshin wrote:
sorry, with the gcc -O3 -ffast-math -fstrict-aliasing -funroll-loops
the C version is 50 times faster than best Haskell one... it's the
loop from C version:
I believe something similar to what I noted here is
Hi List,
I'm running GHC and GCC head-to-head on the task of adding a bunch of
long IOUArray-Vectors really fast. My machine is a Linux-ppc PowerBook
and gets a runtime for the GHC-compiled binary that's about 10x as long
as for GCC. Simon M. tells me this should be much better. Here are the
Sven Moritz Hallberg [EMAIL PROTECTED] writes:
I'm running GHC and GCC head-to-head on the task of adding a bunch of
long IOUArray-Vectors really fast. My machine is a Linux-ppc PowerBook
and gets a runtime for the GHC-compiled binary that's about 10x as long
as for GCC.
Is it possible that
Hello Sven,
Wednesday, January 18, 2006, 3:33:40 PM, you wrote:
SMH and gets a runtime for the GHC-compiled binary that's about 10x as long
SMH as for GCC. Simon M. tells me this should be much better. Here are the
attached version is only 5 times slower :) please note that
1)
Bulat Ziganshin wrote:
Wednesday, January 18, 2006, 3:33:40 PM, you wrote:
SMH and gets a runtime for the GHC-compiled binary that's about 10x as long
SMH as for GCC. Simon M. tells me this should be much better. Here are the
attached version is only 5 times slower :) please note that
1)
Hello Malcolm,
Wednesday, January 18, 2006, 4:22:23 PM, you wrote:
I'm running GHC and GCC head-to-head on the task of adding a bunch of
long IOUArray-Vectors really fast. My machine is a Linux-ppc PowerBook
and gets a runtime for the GHC-compiled binary that's about 10x as long
as for GCC.
Hello Simon,
Wednesday, January 18, 2006, 5:31:25 PM, you wrote:
2) generating random values takes about 1.5-2 seconds by itself.
Haskell's RNG is very different from C's one
SM I squeezed a bit more out (see attached).
x `seq` v `seq` return ()
it's new trick for me :) now the
Hello Bulat,
Wednesday, January 18, 2006, 8:34:54 PM, you wrote:
BZ the only cause that this code is only 3 times slower is that C version
BZ is really limited by memory speed. when tested on 1000-element
BZ arrays, it is 20 times slower. i'm not yet tried SSE optimization for
BZ gcc ;)
sorry,
On Wed, Jan 18, 2006 at 06:18:29PM +0300, Bulat Ziganshin wrote:
:) even C version performs only 20 millions of additions in one second
because this program is most limited by memory throughput - it access
to 24 memory bytes per each addition. GHC just can't produce simple
loops even for
On Wed, Jan 18, 2006 at 08:54:43PM +0300, Bulat Ziganshin wrote:
sorry, with the gcc -O3 -ffast-math -fstrict-aliasing -funroll-loops
the C version is 50 times faster than best Haskell one... it's the
loop from C version:
I believe something similar to what I noted here is the culprit:
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