Andy Wingo <wi...@pobox.com> skribis: > On Sat 31 Aug 2013 12:19, l...@gnu.org (Ludovic Courtès) writes: > >> Andy Wingo <wi...@pobox.com> skribis: >> >>> I just took a look at your program, which ran in 40s on my machine. >>> Under callgrind it turned out that we were doing a lot of iconv stuff >>> that we didn't need to do. >> >> It’s often the case that I/O is faster if you explicitly say that the >> port is UTF-8-encoded, because there’s a fast path for that (not using >> iconv) in 2.0: >> >> (with-fluids ((%default-port-encoding "UTF-8")) >> (call-with-input-file file >> ...)) > > Yep. In this particular case, it turned out that even in UTF-8 locales, > scm_ungetc_unlocked and scm_from_port_string were going through iconv.
Aah, ungetc, OK. Ludo’.
