1#!/usr/bin/perl
2
3# Very simple benchmark script to show how slow Readonly.pm is,
4# and how Readonly::XS solves the problem.
5
6use strict;
7use Readonly;
8use Benchmark;
9
10use vars qw/$feedme/;
11
12#
13# use constant
14#
15use constant CONST_LINCOLN => 'Fourscore and seven years ago...';
16sub const
17{
18    $feedme = CONST_LINCOLN;
19}
20
21#
22# literal constant
23#
24sub literal
25{
26    $feedme = 'Fourscore and seven years ago...';
27}
28
29#
30# typeglob constant
31#
32use vars qw/$glob_lincoln/;
33*glob_lincoln = \ 'Fourscore and seven years ago...';
34sub tglob
35{
36    $feedme = $glob_lincoln;
37}
38
39#
40# Normal perl read/write scalar
41#
42use vars qw/$norm_lincoln/;
43$norm_lincoln = 'Fourscore and seven years ago...';
44sub normal
45{
46    $feedme = $norm_lincoln;
47}
48
49#
50# Readonly.pm with Readonly::XS
51#
52use vars qw/$roxs_lincoln/;
53Readonly::Scalar $roxs_lincoln => 'Fourscore and seven years ago...';
54sub roxs
55{
56    $feedme = $roxs_lincoln;
57}
58
59#
60# Readonly.pm w/o Readonly::XS
61#
62use vars qw/$ro_lincoln/;
63{
64    local $Readonly::XSokay = 0;    # disable XS
65    Readonly::Scalar $ro_lincoln => 'Fourscore and seven years ago...';
66}
67sub ro
68{
69    $feedme = $ro_lincoln;
70}
71
72
73my $code =
74{
75 const => \&const,
76 literal => \&literal,
77 tglob => \&tglob,
78 normal => \&normal,
79 roxs => \&roxs,
80 ro => \&ro,
81};
82
83unless ($Readonly::XSokay)
84{
85    print "Readonly::XS module not found; skipping that test.\n";
86    delete $code->{roxs};
87}
88
89timethese(2_000_000, $code);
90