Re^2: Perl always reads in 4K chunks and writes in 1K chunks... Loads of IO!

This:

open DF, "test.txt" || die "Can't read 'test.txt': $!\n"

Does not do what you think it does.

The || ties itself to "test.txt", which is always true, and not to the return of the open.

This:
open(DF, "test.txt") || die "Can't read 'test.txt': $!\n"

or:

open DF, "test.txt" or die "Can't read 'test.txt': $!\n"

(or binds less tight than ||)

Would accomplish what you want.

GreetZ!,

ChOas
print "profeth still\n" if /bird|devil/;

Comment on Re^2: Perl always reads in 4K chunks and writes in 1K chunks... Loads of IO! Select or Download Code

Replies are listed 'Best First'.
Re^3: Perl always reads in 4K chunks and writes in 1K chunks... Loads of IO! by zebedee (Pilgrim) on Jan 04, 2006 at 02:01 UTC
Why are you measuring under Windows to see what will happen on Unix? If you've only got one machine to play with, why not boot off a LiveCD (like Knoppix) and measure your code (or a key subset) under Linux? Might not be the same OS your ISP is using, but closer to Unix than Windows? Might make absolutely no difference, but at least you might be a bit closer to comparing apples to apples rather than apples (Unix) to oranges (Windows) ...	[reply]

Replies are listed 'Best First'.

Re^3: Perl always reads in 4K chunks and writes in 1K chunks... Loads of IO!
by zebedee (Pilgrim) on Jan 04, 2006 at 02:01 UTC

[reply]