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- Path: sparky!uunet!spool.mu.edu!olivea!apple!cambridge.apple.com!UK0392@AppleLink.Apple.COM
- From: UK0392@AppleLink.Apple.COM (EHN & DIJ Oakley,GB,IDV)
- Newsgroups: comp.lang.lisp.mcl
- Subject: Speed freak needs help
- Message-ID: <725122625.2391426@AppleLink.Apple.COM>
- Date: 23 Dec 92 14:46:00 GMT
- Sender: info-mcl-request@cambridge.apple.com
- Lines: 36
- Approved: comp.lang.lisp.mcl@Cambridge.Apple.C0M
-
- Friends,
-
- I hate to say this, but we are now running into a speed problem with MCL and a
- Quadra 950. It is of our own making, as I will explain, but I am urgently
- seeking a means of running pretty standard Common Lisp at 10-20 times greater
- speed than MCL 2.0 on a Quadra 950 36/400! Pretty GUIs are immaterial, and not
- used - it is raw Lisp power that I seek (and we do accept that this will cost).
- [Having said that, this does not mark a departure from MCL for 99% of our work,
- and I am delighted to see that MCL is starting to get the recognition that it
- deserves (congrats, MCL team!).]
-
- The reason is that we are starting to use John Koza's incredible Genetic
- Programming (mail me if you have not heard of this, and I will send you a list
- of refs. etc.) to optimise stack filters and other things which require
- thousands of iterations of thousands of iterations of thousands of iterations.
- Currently, one decent run takes over week on a Quadra 950, even after some
- serious tuning of code. We are committed to using Lisp, and other languages
- need not apply.
-
- One option that I am thinking of is using a farm of Quadras, but it would be
- much neater if we could simply move our code onto another platform.
-
- John Koza extols TI Explorers, but after finally tracking down someone who
- claims to have a small number of new Explorer systems, I am not sure whether we
- would see anything like the necessary acceleration, and the systems are not
- cheap. Suggestions as to whether an Explorer might suffice would be welcome
- (and rough estimates on configuration would be even neater - given that the
- code runs OK in 6 meg with MCL, but is clearly doing a lot of GC then).
-
- Happy Christmas!
- Howard.
- Howard Oakley, * Howard@quercus.demon.co.uk
- EHN & DIJ Oakley, Brooklands Lodge, * AppleLink UK0392
- Park View Close, Wroxall, Ventnor, * CompuServe 70734,120
- Isle of Wight UK PO38 3EQ * Tel +44 983 853605, fax 853253
-
-