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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Semantic font-lock for Java
Date: Fri, 24 Jan 2020 18:20:27 +0200
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To: Anand Tamariya <atamariya@gmail.com>
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 (message from Anand Tamariya on Fri, 24 Jan 2020 21:45:55 +0530)
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> From: Anand Tamariya <atamariya@gmail.com>
> Date: Fri, 24 Jan 2020 21:45:55 +0530
> Cc: emacs-devel@gnu.org
> 
>  > * Off GCs: 0 Elapsed time: 0.840946 seconds
>  > * Custom GCs: 0 Elapsed time: 1.172106 seconds
>  > * Builin GCs: 1 Elapsed time: 0.991606 seconds
> 
>  I'm not sure I understand these results.  What does each line
>  represent?  Did you run the same benchmark with the default font-lock
>  and with your modifications, and if so, which of these lines shows
>  results for what variant of font-lock?
> 
> Off - Refers to when font-lock is disabled
> Custom - Refers to when my "extract" function is doing the fontification
> Builtin - Refers to jit-lock mode as that's the default for font-lock mode

So we are talking about a 17% slow-down?  Not bad.

Thanks.