Filename | /usr/share/perl/5.26/Exporter.pm |
Statements | Executed 16 statements in 211µs |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
2 | 2 | 1 | 2.26ms | 2.34ms | as_heavy | Exporter::
2 | 1 | 1 | 7µs | 7µs | CORE:subst (opcode) | Exporter::
1 | 1 | 1 | 6µs | 2.34ms | export_to_level | Exporter::
1 | 1 | 1 | 4µs | 12µs | export | Exporter::
0 | 0 | 0 | 0s | 0s | __ANON__[:64] | Exporter::
0 | 0 | 0 | 0s | 0s | export_fail | Exporter::
0 | 0 | 0 | 0s | 0s | export_ok_tags | Exporter::
0 | 0 | 0 | 0s | 0s | export_tags | Exporter::
0 | 0 | 0 | 0s | 0s | import | Exporter::
0 | 0 | 0 | 0s | 0s | require_version | Exporter::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | package Exporter; | ||||
2 | |||||
3 | 1 | 17µs | require 5.006; | ||
4 | |||||
5 | # Be lean. | ||||
6 | #use strict; | ||||
7 | #no strict 'refs'; | ||||
8 | |||||
9 | 1 | 600ns | our $Debug = 0; | ||
10 | 1 | 300ns | our $ExportLevel = 0; | ||
11 | 1 | 600ns | our $Verbose ||= 0; | ||
12 | 1 | 800ns | our $VERSION = '5.72'; | ||
13 | our (%Cache); | ||||
14 | |||||
15 | sub as_heavy { | ||||
16 | 2 | 136µs | require Exporter::Heavy; | ||
17 | # Unfortunately, this does not work if the caller is aliased as *name = \&foo | ||||
18 | # Thus the need to create a lot of identical subroutines | ||||
19 | 2 | 5µs | my $c = (caller(1))[3]; | ||
20 | 2 | 16µs | 2 | 7µs | $c =~ s/.*:://; # spent 7µs making 2 calls to Exporter::CORE:subst, avg 3µs/call |
21 | 2 | 8µs | \&{"Exporter::Heavy::heavy_$c"}; | ||
22 | } | ||||
23 | |||||
24 | # spent 12µs (4+9) within Exporter::export which was called:
# once (4µs+9µs) by Exporter::Heavy::heavy_export_to_level at line 205 of Exporter/Heavy.pm | ||||
25 | 1 | 5µs | 2 | 162µs | goto &{as_heavy()}; # spent 154µs making 1 call to Exporter::Heavy::heavy_export
# spent 9µs making 1 call to Exporter::as_heavy |
26 | } | ||||
27 | |||||
28 | sub import { | ||||
29 | my $pkg = shift; | ||||
30 | my $callpkg = caller($ExportLevel); | ||||
31 | |||||
32 | if ($pkg eq "Exporter" and @_ and $_[0] eq "import") { | ||||
33 | *{$callpkg."::import"} = \&import; | ||||
34 | return; | ||||
35 | } | ||||
36 | |||||
37 | # We *need* to treat @{"$pkg\::EXPORT_FAIL"} since Carp uses it :-( | ||||
38 | my $exports = \@{"$pkg\::EXPORT"}; | ||||
39 | # But, avoid creating things if they don't exist, which saves a couple of | ||||
40 | # hundred bytes per package processed. | ||||
41 | my $fail = ${$pkg . '::'}{EXPORT_FAIL} && \@{"$pkg\::EXPORT_FAIL"}; | ||||
42 | return export $pkg, $callpkg, @_ | ||||
43 | if $Verbose or $Debug or $fail && @$fail > 1; | ||||
44 | my $export_cache = ($Cache{$pkg} ||= {}); | ||||
45 | my $args = @_ or @_ = @$exports; | ||||
46 | |||||
47 | if ($args and not %$export_cache) { | ||||
48 | s/^&//, $export_cache->{$_} = 1 | ||||
49 | foreach (@$exports, @{"$pkg\::EXPORT_OK"}); | ||||
50 | } | ||||
51 | my $heavy; | ||||
52 | # Try very hard not to use {} and hence have to enter scope on the foreach | ||||
53 | # We bomb out of the loop with last as soon as heavy is set. | ||||
54 | if ($args or $fail) { | ||||
55 | ($heavy = (/\W/ or $args and not exists $export_cache->{$_} | ||||
56 | or $fail and @$fail and $_ eq $fail->[0])) and last | ||||
57 | foreach (@_); | ||||
58 | } else { | ||||
59 | ($heavy = /\W/) and last | ||||
60 | foreach (@_); | ||||
61 | } | ||||
62 | return export $pkg, $callpkg, ($args ? @_ : ()) if $heavy; | ||||
63 | local $SIG{__WARN__} = | ||||
64 | sub {require Carp; &Carp::carp} if not $SIG{__WARN__}; | ||||
65 | # shortcut for the common case of no type character | ||||
66 | *{"$callpkg\::$_"} = \&{"$pkg\::$_"} foreach @_; | ||||
67 | } | ||||
68 | |||||
69 | # Default methods | ||||
70 | |||||
71 | sub export_fail { | ||||
72 | my $self = shift; | ||||
73 | @_; | ||||
74 | } | ||||
75 | |||||
76 | # Unfortunately, caller(1)[3] "does not work" if the caller is aliased as | ||||
77 | # *name = \&foo. Thus the need to create a lot of identical subroutines | ||||
78 | # Otherwise we could have aliased them to export(). | ||||
79 | |||||
80 | # spent 2.34ms (6µs+2.34) within Exporter::export_to_level which was called:
# once (6µs+2.34ms) by Time::HiRes::import at line 69 of Time/HiRes.pm | ||||
81 | 1 | 8µs | 2 | 2.51ms | goto &{as_heavy()}; # spent 2.34ms making 1 call to Exporter::as_heavy
# spent 179µs making 1 call to Exporter::Heavy::heavy_export_to_level |
82 | } | ||||
83 | |||||
84 | sub export_tags { | ||||
85 | goto &{as_heavy()}; | ||||
86 | } | ||||
87 | |||||
88 | sub export_ok_tags { | ||||
89 | goto &{as_heavy()}; | ||||
90 | } | ||||
91 | |||||
92 | sub require_version { | ||||
93 | goto &{as_heavy()}; | ||||
94 | } | ||||
95 | |||||
96 | 1 | 12µs | 1; | ||
97 | __END__ | ||||
# spent 7µs within Exporter::CORE:subst which was called 2 times, avg 3µs/call:
# 2 times (7µs+0s) by Exporter::as_heavy at line 20, avg 3µs/call |