From: Dmitry Antipov <dmantipov@yandex.ru>
To: Emacs development discussions <emacs-devel@gnu.org>
Subject: Stack-allocated objects again (+benchmark)
Date: Mon, 29 Sep 2014 11:09:10 +0400 [thread overview]
Message-ID: <54290596.4060702@yandex.ru> (raw)
1) In r117971, I've made an attempt to follow KISS principle and
redesign this stuff for simplicity and speed rather than versatility.
2) I am constantly asked about benchmarks. OK, running this code:
(defun put-property-benchmark ()
(interactive)
(setq buffer-undo-list t)
(let ((oldgc gcs-done)
(oldtime (float-time)))
(while (re-search-forward "[a-f0-9]+" nil t)
(put-text-property (match-beginning 0) (match-end 0)
'face 'font-lock-comment-face))
(message "GCs: %d Elapsed time: %f seconds"
(- gcs-done oldgc) (- (float-time) oldtime))))
through a ~35M dump generated with
od -v -t x2 < glibc-2.19.tar.xz > glibc.txt
shows 55GCs/23.7s with USE_STACK_LISP_OBJECTS and 66GCs/27.9s
without them. Hopefully this simple benchmark is "real enough".
Dmitry
next reply other threads:[~2014-09-29 7:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-29 7:09 Dmitry Antipov [this message]
2014-09-30 2:43 ` Stack-allocated objects again (+benchmark) Paul Eggert
2014-09-30 8:25 ` Dmitry Antipov
2014-09-30 20:19 ` Paul Eggert
2014-09-30 14:05 ` Eli Zaretskii
2014-09-30 15:37 ` Dmitry Antipov
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