Thanks for the tip about PLT_CS_COMPILE_LIMIT! I submitted a revision to the syntax object variant that incorporated sleepnova's and yjqww6's improvements.
Also, I never knew about `(#%declare #:unsafe)` until I saw yjqww6's pull request. It makes a noticeable difference. One unsatisfying thing is that in one place, if I replace the 4 separate define clauses <https://github.com/kostya/benchmarks/blob/47c256dd78b6fa884a36c88b3c936cbe135f835a/brainfuck/bf.rkt#L82> with just `(match-define (cons (op o val) rst) parsed)`, the benchmarks are more than twice slower. On Wednesday, March 3, 2021 at 11:12:30 AM UTC-8 Sam Tobin-Hochstadt wrote: > First, there's no longer a difference because yjqww6 just had a PR > merged that improves the Racket performance. > > The performance difference that was there was mostly because the Chez > code was run with `--optimize-level 3` which turns off safety. If that > was changed to `--optimize-level 2` the timing became much slower. > > Sam > > On Mon, Mar 1, 2021 at 2:39 AM [email protected] > <[email protected]> wrote: > > > > There’s this benchmark on BF interpreter where the Racket and Chez > Scheme implementations are very similar, but Chez Scheme is much faster > than Racket 8.0 at interpreting bench.b (3s vs 8s) and mandel.b (40s vs > 136s). > > > > There’s the “Racket (Syntax Object)” variant that directly parses BF’s > syntax into Racket syntax object, which is faster (3.7s for bench, 82s for > mandel), but still significantly behind Chez Scheme’s naive interpreter. > > > > Profiling doesn’t give very illuminating results, saying most of the > cost is from interpreting BF’s loop instruction. > > > > Given that Racket is on Chez, could this benchmark reveal some low > hanging fruit for improving Racket’s performance? > > > > -- > > You received this message because you are subscribed to the Google > Groups "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/83b2819d-8295-4769-944d-fa0c155976dan%40googlegroups.com > . > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/a5e77286-68b8-481a-8dea-0f547c5ce968n%40googlegroups.com.
