GNU bug report logs - #15294
24.3.50; js2-mode parser is several times slower in lexical-binding mode

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Message #75 received at 15294 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 15294 <at> debbugs.gnu.org
Subject: Re: bug#15294: 24.3.50; js2-mode parser is several times slower in
 lexical-binding mode
Date: Sat, 05 Oct 2013 06:27:19 +0300

On 04.10.2013 16:52, Stefan Monnier wrote:
>> Not sure if I should close this issue now or at least wait until
>> byte-compile--use-old-handlers is nil by default.
>
> Your call.  I'm not completely sure when we should change it: setting it
> to nil will mean that pretty much any file compiled with the new Emacs
> won't run on older Emacsen.  I think I'd like to see 24.4 release before
> making the change.

No problem, guess then I'll leave this open until then.

I'll do the code reshuffling discussed earlier, but actually having a 
performance improvement will be a better reason to switch to lexical 
binding.

> But please do set it in your .emacs ASAP so it gets wider testing.

Good idea, done.

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