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| author | Eli Zaretskii <eliz@gnu.org> | 2015-11-07 15:32:45 +0200 |
|---|---|---|
| committer | Eli Zaretskii <eliz@gnu.org> | 2015-11-07 15:32:45 +0200 |
| commit | fc61ea4fd744480dcd5cd174f4599e135752882a (patch) | |
| tree | 19cdf0cf369c47385c7e0a759506107af6f096c9 /lisp/frame.el | |
| parent | b74c8847e86a9fc2abfe3a80e75cd361ce2d53af (diff) | |
| download | emacs-fc61ea4fd744480dcd5cd174f4599e135752882a.tar.gz emacs-fc61ea4fd744480dcd5cd174f4599e135752882a.tar.bz2 emacs-fc61ea4fd744480dcd5cd174f4599e135752882a.zip | |
Speed up lookup in redisplay--variables
* lisp/frame.el (redisplay--variables): Make it a hash-table.
* src/xdisp.c (maybe_set_redisplay): Access redisplay--variables
as a hash-table. This speeds up this function by an order of
magnitude: where previously a setq was slowed down by 100% by
introducing the maybe_set_redisplay test, it is now only 5%
slower.
(syms_of_xdisp) <redisplay--variables>: Doc fix.
Diffstat (limited to 'lisp/frame.el')
| -rw-r--r-- | lisp/frame.el | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lisp/frame.el b/lisp/frame.el index 4b23cb20ac4..3f31a2973c6 100644 --- a/lisp/frame.el +++ b/lisp/frame.el @@ -2231,8 +2231,10 @@ See also `toggle-frame-maximized'." (make-obsolete-variable 'window-system-version "it does not give useful information." "24.3") -;; These variables should trigger redisplay of the current buffer. -(setq redisplay--variables +;; Variables which should trigger redisplay of the current buffer. +(setq redisplay--variables (make-hash-table :test 'eq :size 10)) +(mapc (lambda (var) + (puthash var 1 redisplay--variables)) '(line-spacing overline-margin line-prefix |