In the "Computer Language Shootout" D does pretty well, except for a couple of the benchmarks.

One of those that it does poorly on is:

http://shootout.alioth.debian.org/benchmark.php?test=revcomp&lang=dlang&id=0

On their test box, it takes ~10 secs. On my machine (a P4 2.2G, 512 MB RAM, Fedora Core 3) it takes 0.68 secs. The test machine and mine are evenly matched except it is running Debian Linux 'unstable', Kernel 2.6.8-1-k7.

They have another box that looks hardware-wise identical to mine (running Gentoo
2005.1 stage 3):

http://shootout.alioth.debian.org/gp4/benchmark.php?test=revcomp&lang=dlang&id=0

On that machine, the same test takes ~9 secs. compared to (again) 0.68 secs on
mine.

There are somethings about the other test machines I'm not privy to like cache size, swap file size, etc... but that couldn't make that big of difference for just one test, could it?

Anybody have any idea what could be going on here, or run into a similiar problem between Fedora and Debian?

Thanks.

It's pretty hard on the heap ... used  ~26MB?


"Dave" <Dave_member@pathlink.com> wrote in message news:dnamf5$2ls5$1@digitaldaemon.com...
>
> In the "Computer Language Shootout" D does pretty well, except for a
> couple of
> the benchmarks.
>
> One of those that it does poorly on is:
>
> http://shootout.alioth.debian.org/benchmark.php?test=revcomp&lang=dlang&id=0
>
> On their test box, it takes ~10 secs. On my machine (a P4 2.2G, 512 MB
> RAM,
> Fedora Core 3) it takes 0.68 secs. The test machine and mine are evenly
> matched
> except it is running Debian Linux 'unstable', Kernel 2.6.8-1-k7.
>
> They have another box that looks hardware-wise identical to mine (running
> Gentoo
> 2005.1 stage 3):
>
> http://shootout.alioth.debian.org/gp4/benchmark.php?test=revcomp&lang=dlang&id=0
>
> On that machine, the same test takes ~9 secs. compared to (again) 0.68
> secs on
> mine.
>
> There are somethings about the other test machines I'm not privy to like
> cache
> size, swap file size, etc... but that couldn't make that big of difference
> for
> just one test, could it?
>
> Anybody have any idea what could be going on here, or run into a similiar problem between Fedora and Debian?
>
> Thanks.
>
> 

"Kris" <fu@bar.com> wrote in message news:dnar25$2pmq$1@digitaldaemon.com...
> It's pretty hard on the heap ... used  ~26MB?
>

That's a good point. The other test that bombs is one using thread synchronization, which is used in the GC also. Hmmm - most of the pthreads portion of the Linux threads implementation seems to work fine because the tcp test uses threads and runs Ok. The synchronization uses mutexes and part of the thread impl. uses semaphores.

Maybe a pattern?

Anybody know of problems with semaphores or mutexes on the unstable/newer versions of Debian?

Thanks.

(re-posting to digitalmars.D.bugs)

>
> "Dave" <Dave_member@pathlink.com> wrote in message news:dnamf5$2ls5$1@digitaldaemon.com...
>>
>> In the "Computer Language Shootout" D does pretty well, except for a
>> couple of
>> the benchmarks.
>>
>> One of those that it does poorly on is:
>>
>> http://shootout.alioth.debian.org/benchmark.php?test=revcomp&lang=dlang&id=0
>>
>> On their test box, it takes ~10 secs. On my machine (a P4 2.2G, 512 MB
>> RAM,
>> Fedora Core 3) it takes 0.68 secs. The test machine and mine are evenly
>> matched
>> except it is running Debian Linux 'unstable', Kernel 2.6.8-1-k7.
>>
>> They have another box that looks hardware-wise identical to mine (running
>> Gentoo
>> 2005.1 stage 3):
>>
>> http://shootout.alioth.debian.org/gp4/benchmark.php?test=revcomp&lang=dlang&id=0
>>
>> On that machine, the same test takes ~9 secs. compared to (again) 0.68
>> secs on
>> mine.
>>
>> There are somethings about the other test machines I'm not privy to like
>> cache
>> size, swap file size, etc... but that couldn't make that big of
>> difference for
>> just one test, could it?
>>
>> Anybody have any idea what could be going on here, or run into a similiar problem between Fedora and Debian?
>>
>> Thanks.
>>
>>
>
>