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

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Message #54 received at 15294 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Dmitry Gutov <dgutov <at> yandex.ru>
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: Sun, 15 Sep 2013 01:06:08 -0400

>> If it indeed comes from the handling of catch/throw, then there are two
>> ways to fix it:
>> - ...
>> - improve the byte-compiler so it can compile away cl-block/cl-return.
>> This should not require new byte-codes, but requires delving "deepish"
>> into the byte-compiler.
> This would take care of `cl-block' wrappers, but it would do nothing about
> explicit uses of `catch', right?

All js2-mode's uses of catch/throw can be replaced with
block/return, AFAICT (not that it's useful right now, since they'll
just be macroexpanded back to catch/throw).


        Stefan

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