From: Burton Samograd <burton@samograd.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: Size and length limits for Emacs primitive types and etc data?
Date: Tue, 05 Feb 2013 12:06:35 -0700 [thread overview]
Message-ID: <m2txpqh96s.fsf@samograd.ca> (raw)
In-Reply-To: mailman.19079.1360088047.855.help-gnu-emacs@gnu.org
Eli Zaretskii <eliz@gnu.org> writes:
>> I think linked nature of elisp data structure cause very high rate of CPU
>> cache miss (but I don't actually run any AMD/Intel CPU profilers).
>
> Prove it.
Here's an analysis of cache misses with pointer based data structures
(linked list and trees):
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.25.9669
It's common knowledge that linked lists are not cache friendly, leading
to creation of structures like Unrolled Linked Lists
(http://en.wikipedia.org/wiki/Unrolled_linked_list) to help.
--
Burton Samograd
next prev parent reply other threads:[~2013-02-05 19:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 22:06 Size and length limits for Emacs primitive types and etc data? Oleksandr Gavenko
2013-02-03 13:56 ` Aurélien Aptel
2013-02-03 19:16 ` Eli Zaretskii
2013-02-04 12:38 ` Aurélien Aptel
2013-02-04 15:57 ` Eli Zaretskii
2013-02-05 9:41 ` Oleksandr Gavenko
2013-02-05 18:14 ` Eli Zaretskii
2013-02-05 20:17 ` Oleksandr Gavenko
2013-02-05 21:35 ` Eli Zaretskii
2013-02-06 18:46 ` Stefan Monnier
[not found] ` <mailman.19079.1360088047.855.help-gnu-emacs@gnu.org>
2013-02-05 19:06 ` Burton Samograd [this message]
2013-02-05 20:04 ` Oleksandr Gavenko
2013-02-05 21:28 ` Eli Zaretskii
2013-02-05 22:25 ` Peter Dyballa
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