Re: [FWP] beauty vs. brains

["Dave W. Smith" <dws@postcognitive.com>]

At 10:30 AM 3/15/00 -0500, Jeff Pinyan wrote:
>I've often done
>
>   $file = do { local $/, <FILE> };
>
>when I wish to slurp a file into a scalar.  However, I recently realized
>that doing
>
>   read(FILE, $file, -s FILE);
>
>can be done in NEARLY half the time.

To settle a bet on this a while back, I put together a test script
that used ktrace on FreeBSD to track the actual number of underlying
kernel read calls. It turned out that Perl's read() results in a
sequence of kernel read()s, each for 0 < n <= BLOCKSIZE byte blocks.

Perl's sysread() uses a single kernel read(), at least on FreeBSD.

Dave



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