From: LdBeth <andpuke@foxmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Tomas Hlavaty <tom@logand.com>, emacs-devel@gnu.org
Subject: Re: funcall consing
Date: Fri, 31 Dec 2021 23:09:56 +0800 [thread overview]
Message-ID: <tencent_75467508ACEEFFA8DCFCBBD11C2B7ADA3009@qq.com> (raw)
In-Reply-To: <83fsq9gdhw.fsf@gnu.org>
>>>>> In <83fsq9gdhw.fsf@gnu.org>
>>>>> Eli Zaretskii <eliz@gnu.org> wrote:
Tomas> (benchmark-run 10 (dotimes (i 100000) (1+ i)))
Tomas> ;;(2.720941123 40 1.7525918699999998)
Tomas> (let ((x (lambda (i) (1+ i)))) (benchmark-run 10 (dotimes (i 100000) (funcall x i))))
Tomas> ;;(4.9373091140000005 80 3.4835688719999958)
Eli> What do you mean by "consing" in this context, and what is your
Eli> evidence for "consing" in the above example? Is that only the
Eli> performance degradation, or is that something else?
Tomas probably means this (from the docstring of benchmark-run):
Return a list of the total elapsed time for execution, the number of
garbage collections that ran, and the time taken by garbage collection.
> (4.9373091140000005 80 3.4835688719999958)
The `80' indicats the GC has been invoked 80 times. That is the direct
indication of "consing".
--
LDB
next prev parent reply other threads:[~2021-12-31 15:09 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-31 11:01 funcall consing Tomas Hlavaty
2021-12-31 12:33 ` Eli Zaretskii
2021-12-31 15:09 ` LdBeth [this message]
2021-12-31 17:00 ` Tomas Hlavaty
2021-12-31 18:42 ` Eli Zaretskii
2022-01-01 4:47 ` Richard Stallman
2022-01-01 7:26 ` Eli Zaretskii
2022-01-02 13:30 ` Tomas Hlavaty
2022-01-02 14:46 ` Eli Zaretskii
2022-01-02 15:59 ` Tomas Hlavaty
2022-01-02 18:53 ` Stefan Monnier
2022-01-01 4:51 ` LdBeth
2022-01-01 7:28 ` Eli Zaretskii
2022-01-01 17:05 ` Stefan Monnier
2022-01-01 17:21 ` Eli Zaretskii
2021-12-31 14:27 ` LdBeth
2021-12-31 16:56 ` Tomas Hlavaty
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