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Re: [Nmh-workers] Pessimal Optimizations.
From: |
Lyndon Nerenberg |
Subject: |
Re: [Nmh-workers] Pessimal Optimizations. |
Date: |
Tue, 11 Dec 2012 17:47:52 -0800 |
On 2012-12-11, at 5:25 PM, Lyndon Nerenberg wrote:
> But again, these really are micro-optimizations. mmap() won't make anything
> run perceivably faster, but it will introduce the potential for many subtle
> bugs. Best to leave well enough alone.
I forgot to say ...
Someone mentioned FreeBSD (I think) and cp using mmap() for copies.
These are *very* OS-specific optimizations. Look at FreeBSD's malloc for an
excellent example of the misuse of mmap() :-P
None of these mmap() "optimizations" is portable; MH's heritage is portability.
--lyndon
- Re: [Nmh-workers] m_getfld, (continued)
- Re: [Nmh-workers] m_getfld, Ken Hornstein, 2012/12/10
- Re: [Nmh-workers] m_getfld, Paul Vixie, 2012/12/10
- Re: [Nmh-workers] m_getfld, Jon Steinhart, 2012/12/10
- Re: [Nmh-workers] m_getfld, Ken Hornstein, 2012/12/10
- Re: [Nmh-workers] m_getfld, Valdis . Kletnieks, 2012/12/14
- Re: [Nmh-workers] m_getfld, Paul Vixie, 2012/12/14
- Re: [Nmh-workers] m_getfld, Paul Vixie, 2012/12/10
- Re: [Nmh-workers] m_getfld, Ken Hornstein, 2012/12/10
Re: [Nmh-workers] m_getfld, Ralph Corderoy, 2012/12/11
Re: [Nmh-workers] Pessimal Optimizations., Ken Hornstein, 2012/12/11
Re: [Nmh-workers] Pessimal Optimizations., Lyndon Nerenberg, 2012/12/11
Re: [Nmh-workers] Pessimal Optimizations., Lyndon Nerenberg, 2012/12/11
Re: [Nmh-workers] m_getfld, David Levine, 2012/12/11