Re: malloc

From: Poul-Henning Kamp (none@phk--phk.freebsd.dk.lh.bsd-dk.dk)
Date: Wed 03 Dec 2003 - 16:13:55 CET

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To: bsd-dk@bsd-dk.dk
Subject: Re: malloc 
From: "Poul-Henning Kamp" <none@phk--phk.freebsd.dk.lh.bsd-dk.dk>
Date: Wed, 03 Dec 2003 16:13:55 +0100

In message <none@20031203143513.GA16885--kosmos.molioner.dk.lh.bsd-dk.dk>, Michael Knudsen writes:
>> Jep, det er bare et "sort hul at falde i", men desværre koster det
>> forholdsvis meget i performance.
>
>Idéen er vist ogsaa, at det primaert skal bruges til at teste kode med.
>Det fanger angiveligt mange off-by-ones. Hvorfor koster det i
>performance? Er det blot den ekstra allokering (og evt. mapping?) af
>pages, der er dyr?

Det fragmenterer VM systemets tabeller.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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