Subject: Re: bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode

From: Dmitry Gutov <[email-masked]>
Date: Fri, 04 Oct 2013 05:38:20 +0300

On 03.10.2013 08:00, Stefan Monnier wrote:
> You can try setting byte-compile--use-old-handlers to nil now to see if
> it fixes your performance problems.

Indeed, I see the same peformance improvement you wrote about: 0.60s in 
byte-compiled dynamic binding mode, and now 0.48s in byte-compiled 
lexical binding mode. Thanks!

Not sure if I should close this issue now or at least wait until 
byte-compile--use-old-handlers is nil by default.