Hello! I did some more fiddling with gsubrs:
http://git.savannah.gnu.org/gitweb/?p=guile.git;a=commitdiff;h=8321ed20f69b4c56cb680563160cd30ecac8f509 The change adds a vararg function to invoke gsubrs when the number of arguments is known, thereby eliminating consing. The benchmark is as follows: - before ("subr.bm: subr invocation: simple subr" 700000 total 0.98) ("subr.bm: subr invocation: generic subr" 700000 total 1.39) ("subr.bm: subr invocation: generic subr with rest arg" 700000 total 1.32) ("subr.bm: subr invocation: generic subr with rest arg and 3+ parameters" 700000 total 1.63) - after ("subr.bm: subr invocation: simple subr" 700000 total 1.0) ("subr.bm: subr invocation: generic subr" 700000 total 1.1) ("subr.bm: subr invocation: generic subr with rest arg" 700000 total 1.19) ("subr.bm: subr invocation: generic subr with rest arg and 3+ parameters" 700000 total 1.65) That's again a 20% improvement for gsubrs with no rest argument (`hashq-ref', `substring', `open', `string-upcase', `gettext', etc.) and a 10% for procedures with a rest argument called with less than 3 arguments (e.g., `(cons* 1 2)', `(run-hook h 1)', `(throw 'foo 'bar)', `(make-regexp "foo")'). Thanks, Ludo'.
