Re: [bug #33138] .PARLLELSYNC enhancement with patch

[Paul Smith]

On Wed, 2013-04-24 at 22:25 +0300, Eli Zaretskii wrote:
> > From: Paul Smith <address@hidden>
> > Cc: address@hidden, address@hidden
> > Date: Wed, 24 Apr 2013 15:07:21 -0400
> > 
> > I'm not so sure fstat() is that cheap.  struct stat contains a lot of
> > information.  Although I guess since we are only ever talking about temp
> > files, not NFS files or something, it's probably not too bad.
> 
> We could time it if we are afraid of the cost, but I'd be surprised if
> 'fstat' wasn't extremely fast on Posix platforms.  Most of the
> information you get in struct stat is already available when the file
> is open.  In particular, the OS tracks the file's size as it is being
> written.

True.  It's probably all right there and not measurably different if you
have a file descriptor already.