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-rw-r--r--lang/elisp/example.el29
1 files changed, 29 insertions, 0 deletions
diff --git a/lang/elisp/example.el b/lang/elisp/example.el
index 3379418ff..eebd2f88e 100644
--- a/lang/elisp/example.el
+++ b/lang/elisp/example.el
@@ -8,3 +8,32 @@
(apply 'concat contents)
"</BODY>\n"
"</HTML>\n"))
+
+(defmacro time (repeat-count &rest body)
+ `(let ((count ,repeat-count)
+ (beg (current-time))
+ end)
+ (while (> count 0)
+ (setq count (- count 1))
+ ,@body)
+ (setq end (current-time))
+ (+ (* 1000000.0 (+ (* 65536.0 (- (car end) (car beg)))
+ (- (cadr end) (cadr beg))))
+ (* 1.0 (- (caddr end) (caddr beg))))))
+
+;Non-scientific performance measurements (Guile measurements are with
+;`guile -q --no-debug'):
+;
+;(time 100000 (+ 3 4))
+; => 225,071 (Emacs) 4,000,000 (Guile)
+;(time 100000 (lambda () 1))
+; => 2,410,456 (Emacs) 4,000,000 (Guile)
+;(time 100000 (apply 'concat (mapcar (lambda (s) (concat s "." s)) '("a" "b" "c" "d"))))
+; => 10,185,792 (Emacs) 136,000,000 (Guile)
+;(defun sc (s) (concat s "." s))
+;(time 100000 (apply 'concat (mapcar 'sc '("a" "b" "c" "d"))))
+; => 7,870,055 (Emacs) 26,700,000 (Guile)
+;
+;Sadly, it looks like the translator's performance sucks quite badly
+;when compared with Emacs. But the translator is still very new, so
+;there's probably plenty of room of improvement.