From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Help with adding an auxiliary bytecode table
Date: Sun, 21 Apr 2019 00:11:25 -0400 [thread overview]
Message-ID: <jwvsguct2z7.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: 87pnpj9uod.fsf@gmail.com
> I've attached a diff below that adds an auxiliary optable to bytecode.c
> and attempts to integrate it into bytecode.el. I can run emacs -Q with
> it, but when I run it with my configuration I get the following in
> stderr:
>
> Invalid function: ((bytecomp "Wrong type argument: arrayp, nil" :error
> "*Compile-Log*"))
Use the debugger so you can get a more complete backtrace.
> My initial reaction is that the stale bytecode is somehow incompatible,
What/which stale bytecode?
> The problem is that since memq is a bytecode operation, it turns out
> to be faster than vector-memq for small input
Why is that a problem?
> unless I make sure that memq isn't turned into a bytecode op.
> So since the current space in the lookup table is limited, I figured
> that a prefix command that looks up in a secondary table would be
> a good solution.
We don't have too many bytecodes left, indeed, but there are still some,
IIRC, so it's not indispensable to go a 2-byte bytecodes.
Stefan
next prev parent reply other threads:[~2019-04-21 4:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-18 15:53 Help with adding an auxiliary bytecode table Alex Gramiak
2019-04-18 17:07 ` Paul Eggert
2019-04-18 20:47 ` Alex Gramiak
2019-04-21 4:11 ` Stefan Monnier [this message]
2019-04-21 19:17 ` Help with adding new setq-based bytecodes (was: Help with adding an auxiliary bytecode table) Alex Gramiak
2019-04-21 20:22 ` Help with adding new setq-based bytecodes Stefan Monnier
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