Date: Tue, 22 Oct 2002 11:01:59 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: Terry Lambert <tlambert2@mindspring.com> Cc: Danny Braniss <danny@cs.huji.ac.il>, Poul-Henning Kamp <phk@critter.freebsd.dk>, freebsd-hackers@FreeBSD.ORG Subject: Re: malloc Message-ID: <20021022110159.A1513@Odin.AC.HMC.Edu> In-Reply-To: <3DB50A5A.F87EDA78@mindspring.com>; from tlambert2@mindspring.com on Tue, Oct 22, 2002 at 01:20:42AM -0700 References: <E183u5Y-0003Yc-00@cse.cs.huji.ac.il> <3DB50A5A.F87EDA78@mindspring.com>
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--zYM0uCDKw75PZbzx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 22, 2002 at 01:20:42AM -0700, Terry Lambert wrote: > The FreeBSD malloc would be lower performance than the Linux malloc, > if you allocate space in teeny, tiny chunks; it has much higher > performance for large allocations. Good programmers allocate their > resources up front, once, instead of doing the allocations in time > critical internal loops. The user may also see a performance gain on Linux if they use a less stupid allocation scheme. I ran into some code once that read strings one character at a time via getc() and did a realloc for each read. Needless to say, performance was truly awful since a typical run required parsing over 600MB of text. I saw a better then 50% speedup on Alpha Linux when I fixed that mess. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --zYM0uCDKw75PZbzx Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9tZKWXY6L6fI4GtQRArfPAJ91KLcQ/5wMMrv0mP9mlM8QkpItZgCg3g5w 0yugeTHcq6U5+BHyfqv2YL0= =TgMp -----END PGP SIGNATURE----- --zYM0uCDKw75PZbzx-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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