bug#19393: 25.0.50; Emacs cannot determine coding system of ISO-8859 encoded files

[Lars Ingebrigtsen]

Wolfgang Jenkner <wjenkner@inode.at> writes:

> * src/buffer.c (MAP_EXCL): Make sure it is always defined.
> (MMAP_ALLOCATED_P, mmap_enlarge): Use it.
> This alleviates a performance problem due to excessive use of
> memcpy(3). (Bug#19393)

[...]

> -                 MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0);
> +                 MAP_ANON | MAP_EXCL | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0);

This patch apparently made loading huge files on FreeBSD a lot faster,
but as far as I can tell, it was never applied.

This was five years ago, though -- Wolfgang, is this still a problem on
FreeBSD?

-- 
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   bloggy blog: http://lars.ingebrigtsen.no