Re: Performance assistance / advice
"Tim Bradshaw (as tfb at tfeb dot org)" <[email protected]>
| Newsgroups | gmane.lisp.lispworks.general |
|---|---|
| Message-ID | <[email protected]> |
On 15 Apr 2025, at 13:49, Yuri Davidovsky (as work at disclosure dot ie) <[email protected]> wrote: > > Not bad. I assume the best lisp performance version would be sbcl? How does the C code fare without optimisations enabled for the corrected code? Yes, SBCL: LW is OK but somewhat slower (which is fine: LW has other advantages!) With no optimisation flags C is doing about 2.2GFLOPS. There's not much difference between -O and -O3. My uninformed suspicion is that C is beating SBCL because the C compiler is emitting fmadd instructions, and there's an awful lot of x -> x + a * b in the code of course. SBCL doesn't seem to emit those. But I'm not sure. --tim _______________________________________________ Lisp Hug - the mailing list for LispWorks users [email protected] http://www.lispworks.com/support/lisp-hug.html