Woo!
Salvatore kindly sent me a Darcs patch, and applying it does indeed make it run
faster. Yay!
[Note that -fvia-c works just fine for me. It doesn't appear to produce a huge
speed difference, but it compiles just fine.]
Thanks for the tips, guys! :-D The changes are in the online Darcs
2008/5/21 Andrew Coppin [EMAIL PROTECTED]:
Woo!
Salvatore kindly sent me a Darcs patch, and applying it does indeed make it
run faster. Yay!
Hi Andrew,
I'm glad that -fvia-c works for you: maybe it's a Mac OS X specific bug?
Anyway, did you compile with -fvia-c -optc-O3? I expect
Thanks for taking a look at this.
kirby81:
2008/5/17 Andrew Coppin [EMAIL PROTECTED]:
Hi folks.
OK, try this:
darcs get http://darcs.orphi.me.uk/MyMD5
cd MyMD5
ghc -O2 --make md5sum
md5sum some large filename
I've got some time to take a look at the code. It's very nice,
Don Stewart wrote:
Andrew, I hope you look carefully at the suggestions here, and use them
to improve the code you were working on.
Indeed, this is just the sort of stuff I was hoping to get... [Top marks
for spotting the laziness leak in pad BTW! I totally missed that.]
While I'm here,
andrewcoppin:
Don Stewart wrote:
Andrew, I hope you look carefully at the suggestions here, and use them
to improve the code you were working on.
Indeed, this is just the sort of stuff I was hoping to get... [Top marks
for spotting the laziness leak in pad BTW! I totally missed that.]
2008/5/20 Don Stewart [EMAIL PROTECTED]:
Probably compiling with -fvia-C could help even more, but strangely:
[roxas:~/Desktop/test2/MyMD5] kirby% ghc -fvia-C -funbox-strict-fields
-O2 --make md5sum.hs
[roxas:~/Desktop/test2/MyMD5] kirby% time ./md5sum ../../jboss-4.2.2.GA.zip
Segmentation
Don Stewart wrote:
andrewcoppin:
While I'm here, can I just clarify *exactly* what -funbox-strict-fields
actually does?
If in doubt, ask the user's guide:
http://www.haskell.org/ghc/docs/latest/html/users_guide/pragmas.html#unpack-pragma
...so making a field strict causes
Neil Mitchell wrote:
Hi
The MD5SUM.EXE file I have chokes if you ask it to hash a file in
another directory. It will hash from stdin, or from a file in the
current directory, but point-blank refuses to hash anything else.
Try http://www.cs.york.ac.uk/fp/yhc/dependencies/UnxUtils.zip
Bulat Ziganshin wrote:
Hello Andrew,
Saturday, November 17, 2007, 5:45:29 PM, you wrote:
wasn't MD5 itself. It's all the datatype conversions. Nowhere in the
Haskell libraries can I find any of these functions:
I had to write all these myself, by hand, and then check that I got
BTW, while I'm here... I sat down and wrote my own MD5 implementation.
How is the performance on this new MD5 routine? It looks like we have
gone from just one Haskell MD5 implementation (that I know of) to
three in a short period of time. This isn't counting the C bindings,
of coarse.
Also,
Thomas DuBuisson wrote:
BTW, while I'm here... I sat down and wrote my own MD5 implementation.
How is the performance on this new MD5 routine?
Ask me *after* I modify it to give the correct answers. ;-)
Interesting question: How do you determine when an implementation of
something as
On Sat, 2007-11-17 at 16:40 +, Andrew Coppin wrote:
Thomas DuBuisson wrote:
BTW, while I'm here... I sat down and wrote my own MD5 implementation.
How is the performance on this new MD5 routine?
Ask me *after* I modify it to give the correct answers. ;-)
Interesting
bulat.ziganshin:
Hello Andrew,
Saturday, November 17, 2007, 5:45:29 PM, you wrote:
wasn't MD5 itself. It's all the datatype conversions. Nowhere in the
Haskell libraries can I find any of these functions:
I had to write all these myself, by hand, and then check that I got
it's a
On Nov 17, 2007 11:40 AM, Andrew Coppin [EMAIL PROTECTED] wrote:
As far as I know, mine is unique in that it's 100% Haskell and
requires nothing aside from the libraries shipping with GHC in order to
compile. (E.g., I downloaded somebody else's, and it just wouldn't
compile. It was looking for
Don Stewart wrote:
andrewcoppin:
Speaking of which [yes, I'm going to totally hijack this thread now...],
does anybody have a Haskell MD5 hash implementation that goes fast?
Start with a fast C version, and translate that into code over
ByteStrings. If its not within 2x, call the
Don Stewart wrote:
You might like to test against,
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/nano-md5-0.1
which is a strict bytestring openssl binding.
Is that likely to work on Windows?
Much as I'd love a 100% Haskell implementation [that goes fast], I do
also have
andrewcoppin:
Don Stewart wrote:
You might like to test against,
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/nano-md5-0.1
which is a strict bytestring openssl binding.
Is that likely to work on Windows?
Much as I'd love a 100% Haskell implementation [that goes
Don Stewart wrote:
andrewcoppin:
Don Stewart wrote:
You might like to test against,
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/nano-md5-0.1
which is a strict bytestring openssl binding.
Is that likely to work on Windows?
Much as I'd love a 100% Haskell
Hi
The final alternative is that I just call MD5SUM.EXE from my Haskell
program and try to parse the output. But that strikes me as rather messy.
Messy, but I don't see any disadvantage to doing it this way - if you
can control that the MD5SUM program is installed alongside your code.
Of
Neil Mitchell wrote:
Hi
The final alternative is that I just call MD5SUM.EXE from my Haskell
program and try to parse the output. But that strikes me as rather messy.
Messy, but I don't see any disadvantage to doing it this way - if you
can control that the MD5SUM program is
Hi
The MD5SUM.EXE file I have chokes if you ask it to hash a file in
another directory. It will hash from stdin, or from a file in the
current directory, but point-blank refuses to hash anything else.
Try http://www.cs.york.ac.uk/fp/yhc/dependencies/UnxUtils.zip - that
has an MD5SUM program
I minor changes, fixing up my chunking function (finally) thus
eliminating the space leak. Performance is now under 3x that of C!
Yay! Also, nano MD5 benched at 1.15x 'C' (for files small enough for
strict ByteStrings to do ok).
Get the code:
darcs get http://code.haskell.org/~tommd/pureMD5
On
On Fri, Nov 09, 2007 at 09:05:58PM +, Andrew Coppin wrote:
The MD5SUM.EXE file I have chokes if you ask it to hash a file in another
directory. It will hash from stdin, or from a file in the current
directory, but point-blank refuses to hash anything else. So I'd have to
write my
Glad you asked!
http://sequence.complete.org/node/367
I just posted that last night! Once I get a a community.haskell.org
login I will put the code on darcs.
The short of it it:
1) The code is still ugly, I haven't been modivated to clean.
2) Manually unrolled, it is ~ 6 times slower than C
3)
andrewcoppin:
Don Stewart wrote:
dpiponi:
I was getting about 1.5s for the Haskell program and about 0.08s for
the C one with the same n=10,000,000.
I'm sure we can do better than that!
That's the spirit! :-D
Speaking of which [yes, I'm going to totally hijack this
thomas.dubuisson:
Glad you asked!
http://sequence.complete.org/node/367
I just posted that last night! Once I get a a community.haskell.org
login I will put the code on darcs.
Cool. I'll look at this.
You might like to test against,
On Thu, Nov 08, 2007 at 06:14:20PM -0500, Thomas M. DuBuisson wrote:
Glad you asked!
http://sequence.complete.org/node/367
I just posted that last night! Once I get a a community.haskell.org
login I will put the code on darcs.
The short of it it:
1) The code is still ugly, I haven't
27 matches
Mail list logo
