From: Dmitry Gutov <dgutov@yandex.ru>
To: Stefan Monnier <monnier@iro.umontreal.ca>, emacs-devel@gnu.org
Subject: Re: Lexical binding: why?
Date: Tue, 28 May 2019 16:46:31 +0300 [thread overview]
Message-ID: <1335faa5-dba6-97bf-74ee-3ba09eb0137f@yandex.ru> (raw)
In-Reply-To: <jwvo93mn29c.fsf-monnier+emacs@gnu.org>
On 28.05.2019 16:25, Stefan Monnier wrote:
> Maybe the speed up I remember was linked to the rework I suggested back
> then to work around the poor lexical-scoping performance (mainly moving
> a condition-case outside of a loop, IIRC) and that actually improved
> performance with both lexical and dynamic binding?
No, you remembered correctly: without the new byte-code, the situation
was noticeably worse. Though maybe it was a 'throw' inside a loop with
'catch' outside it.
The 10% figure I just got from this thread:
https://github.com/mooz/js2-mode/issues/524#issuecomment-483010120
But it's actually comparing against an older js2-mode version, not
against the current code in dynamic-binding mode. I don't have time to
redo the measurements now myself, but thinking back, maybe the result of
the byte-code introduction was that lexical-binding became slightly
faster than dynamic, though not by much.
next prev parent reply other threads:[~2019-05-28 13:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 10:08 Lexical binding: why? Alan Mackenzie
2019-05-28 12:01 ` Tadeus Prastowo
2019-05-28 12:26 ` Stefan Monnier
2019-05-28 13:02 ` Dmitry Gutov
2019-05-28 13:25 ` Stefan Monnier
2019-05-28 13:46 ` Dmitry Gutov [this message]
2019-05-28 13:44 ` Alan Mackenzie
2019-05-28 17:21 ` Stefan Monnier
2019-05-28 17:41 ` Alan Mackenzie
2019-05-28 17:58 ` Stefan Monnier
2019-05-28 15:19 ` John Wiegley
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