svn commit: r39189 - head/en_US.ISO8859-1/books/porters-handbook

[Konstantin Belousov]

On Thu, Jul 12, 2012 at 02:12:49PM +0000, Isabell Long wrote:
> Author: issyl0
> Date: Thu Jul 12 14:12:49 2012
> New Revision: 39189
> URL: http://svn.freebsd.org/changeset/doc/39189
> 
> Log:
>   Add a section to the Dos and Don'ts section of the porter's handbook
>   about avoiding Linuxisms.

> +      <para>A number of simple syscalls (for example
> +	&man.gettimeofday.2;, &man.getpid.2;) are much faster on
> +	&linux; than on any other operating system due to caching and
> +	the vsyscall performance optimizations.  Do not rely on them
> +	being cheap in performance-critical applications.  In general,
> +	try hard to avoid syscalls if possible.</para>
And this is not quite true for HEAD and soon for RELENG_9.
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