Yes, that does appear to be (crudely measured) about twice as fast, though it wouldn't work for mutally recursive subs. 

#!/usr/bin/perl -w
use strict;
$|++;

my $count;

deep( $ARGV[ 0 ] );
print $count;

sub deep {SUB:{
++$count and --$_[ 0 ] and redo SUB;
}}

#sub deep {
#    ++$count and --$_[ 0 ] and goto \&deep;
#}
__DATA__
[20:54:56.63] P:\test>422344 10000000
10000000
[20:54:59.48] P:\test>422344 

[20:55:17.40] P:\test>422344 100000000
100000000
[20:55:41.24] P:\test>

[download]
Examine what is said, not who speaks.
Silence betokens consent.
Love the truth but pardon error.

In reply to Re^7: Who's a thief? (No memory growth with magic goto) by BrowserUk
in thread Who's a thief? -- the follow up by Ovid

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