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Re: Loading dynamic docstrings and bytecode more lazily

From: Lluís
Subject: Re: Loading dynamic docstrings and bytecode more lazily
Date: Sat, 09 Feb 2013 12:13:18 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux)

Stefan Monnier writes:
> Sadly, the result is disappointing.  When loading cl-macs.elc (i.e. one
> the files where the change should shine), I see a speed up of 4%.
> Admittedly, this is with a warm cache (basically, I read cl-macs.elc
> many times in a loop), whereas the main point of this optimization is to
> reduce I/O, so it should be more useful in the cold cache situation.
> So maybe, the improvement is more significant in other circumstances.

In Linux you can force the system to empty the disk cache with:

       sync ; sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

Startup time should also serve as an indicator (provided all files are


 "And it's much the same thing with knowledge, for whenever you learn
 something new, the whole world becomes that much richer."
 -- The Princess of Pure Reason, as told by Norton Juster in The Phantom

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