1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#!/usr/bin/perl
use strict;
use warnings;
use Benchmark qw(cmpthese);
use Sub::Recursive;
use vars qw/ $rec /;
sub manual_recursive {
my $_foo = sub { @_ ? $_[0] + $rec->(@_[1 .. $#_]) : 0 };
return sub {
local $rec = $_foo;
$_foo->(@_);
};
}
sub leaker {
my $_foo;
$_foo = sub { @_ ? $_[0] + $_foo->(@_[1 .. $#_]) : 0 };
return $_foo;
}
my $leaker = leaker();
my $manual = manual_recursive();
my $recursive = recursive { @_ ? $_[0] + $REC->(@_[1 .. $#_]) : 0 };
my @vals = 1 .. 50;
cmpthese(-10, {
leaker => sub { $leaker->(@vals) },
manual => sub { $manual->(@vals) },
recursive => sub { $recursive->(@vals) },
});
__END__
Rate manual recursive leaker
recursive 1447/s -- -0% -0%
manual 1449/s 0% -- -0%
leaker 1454/s 0% 0% --
This is perl, v5.8.0 built for MSWin32-x86-multi-thread
(with 1 registered patch, see perl -V for more detail)
Copyright 1987-2002, Larry Wall
Binary build 806 provided by ActiveState Corp. http://www.ActiveState.com
Built 00:45:44 Mar 31 2003
|
