[Emacs-bug-tracker] bug#6996: closed (`byte-compile-report-ops', `byte-code-meter', `byte-metering-on', what are they?)

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Your message dated Tue, 7 Sep 2010 19:29:06 -0400
with message-id <address@hidden>
and subject line Re: bug#6996: `byte-compile-report-ops', `byte-code-meter', 
`byte-metering-on', what are they?
has caused the GNU bug report #6996,
regarding `byte-compile-report-ops', `byte-code-meter', `byte-metering-on', 
what are they?
to be marked as done.

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6996: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6996
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> --- Begin Message ---
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> Subject: 
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> `byte-compile-report-ops', `byte-code-meter', `byte-metering-on',	what are they?
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> Date: 
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> Tue, 7 Sep 2010 17:33:22 -0400
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> `byte-compile-report-ops', `byte-code-meter', `byte-metering-on', what are they?
>
> Following files:
>  src/bytecode.c
>  lisp/emacs-lisp/bytecomp.el
>
> define the variables `byte-code-meter', `byte-metering-on' and a function
> `byte-compile-report-ops'.
>
> there is this comment in bytecomp.el
>  ";;; report metering (see the hacks in bytecode.c)"
>
> I can't find reference to these anywher in docs, archives, etc.
> What do these things do?
>
> (byte-compile-report-ops)
> => Debugger entered--Lisp error: (void-variable byte-code-meter)
>
> --
> /s_P\
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> --- Begin Message ---
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> Subject: 
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> Re: bug#6996: `byte-compile-report-ops', `byte-code-meter',	`byte-metering-on', what are they?
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> Date: 
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> Tue, 7 Sep 2010 19:29:06 -0400
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> MON KEY wrote (on Tue, 7 Sep 2010 at 17:33 -0400):
>
> > `byte-compile-report-ops', `byte-code-meter', `byte-metering-on', what are 
> > they?
> > 
> > Following files:
> >  src/bytecode.c
> >  lisp/emacs-lisp/bytecomp.el
> > 
> > define the variables `byte-code-meter', `byte-metering-on' and a function
> > `byte-compile-report-ops'.
>
> >From src/bytecode.c:
>
> #ifdef BYTE_CODE_METER
>   DEFVAR_LISP ("byte-code-meter", &Vbyte_code_meter,...
> ...
> #endif
>
> In the comments in the same file:
>
>   define BYTE_CODE_METER to enable generation of a byte-op usage
>   histogram.
>
> So if you are interested, why not define it, re-build and see what
> happens?
>
> I have no idea what it does, but since it is not on by default since
> 1991, and is not documented anywhere, I don't see it as a bug if it
> doesn't do whatever it is supposed to do. At the worst it is dead code
> that could be deleted.
>
>
> --- End Message ---