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| author | Mattias Engdegård <mattiase@acm.org> | 2020-07-25 19:12:26 +0200 |
|---|---|---|
| committer | Mattias Engdegård <mattiase@acm.org> | 2020-07-25 19:24:56 +0200 |
| commit | 609cbd63c31a21ca521507695abeda1203134c99 (patch) | |
| tree | 52bd1f110dc18f2c8b85e845b99b8eb612d88978 /lisp/emacs-lisp/debug.el | |
| parent | 3b44829823f43d3736b8ec9db2258eeff7f6c16a (diff) | |
| download | emacs-609cbd63c31a21ca521507695abeda1203134c99.tar.gz emacs-609cbd63c31a21ca521507695abeda1203134c99.tar.bz2 emacs-609cbd63c31a21ca521507695abeda1203134c99.zip | |
Optimise 3-arg +, - and *
Turn (+ a b c) into (+ (+ a b) c), and do the same for - and *.
The 2-arg operations have their own bytecode which results in a 1.5×
speed-up. Furthermore, the transform enables other optimisations; for
example, (+ a 1 b) -> (+ (1+ a) b).
* lisp/emacs-lisp/byte-opt.el (byte-optimize-plus, byte-optimize-minus)
(byte-optimize-multiply): Transform (OP a b c) into (OP (OP a b) c).
Diffstat (limited to 'lisp/emacs-lisp/debug.el')
0 files changed, 0 insertions, 0 deletions