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 16:02:53 +0300 [thread overview]
Message-ID: <1df3afde-497e-bb67-9cce-5c5d7e5887a6@yandex.ru> (raw)
In-Reply-To: <jwvblzmojyg.fsf-monnier+emacs@gnu.org>
On 28.05.2019 15:26, Stefan Monnier wrote:
> IIRC some operation in the js2 code was significantly slowed down (in
> Emacs-24) by lexical-binding and then (less significantly but still
> significantly) sped up when the new condition-case byte-codes were
> introduced in 24.4 (and used by default since Emacs-25), so there are
> some cases, but by and large I wouldn't expect any major change.
I think js2-mode in lexical-binding is still ~10% slower than the
dynamic binding mode, but we switched over anyway because of the sounder
scoping model and better compiler diagnostics.
next prev parent reply other threads:[~2019-05-28 13:02 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 [this message]
2019-05-28 13:25 ` Stefan Monnier
2019-05-28 13:46 ` Dmitry Gutov
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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