| File | /usr/local/lib/perl5/5.10.1/if.pm |
| Statements Executed | 24 |
| Statement Execution Time | 64µs |
| Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
|---|---|---|---|---|---|
| 2 | 1 | 1 | 33µs | 42µs | if::work |
| 2 | 2 | 1 | 7µs | 7µs | if::import |
| 2 | 1 | 2 | 6µs | 6µs | if::CORE:subst (opcode) |
| 0 | 0 | 0 | 0s | 0s | if::unimport |
| Line | State ments |
Time on line |
Calls | Time in subs |
Code |
|---|---|---|---|---|---|
| 1 | package if; | ||||
| 2 | |||||
| 3 | 1 | 500ns | $VERSION = '0.05'; | ||
| 4 | |||||
| 5 | # spent 42µs (33+9) within if::work which was called 2 times, avg 21µs/call:
# 2 times (33µs+9µs) by Moose::Object::BEGIN@12 or Moose::Object::BEGIN@13 at line 18, avg 21µs/call | ||||
| 6 | 2 | 1µs | my $method = shift() ? 'import' : 'unimport'; | ||
| 7 | 2 | 700ns | die "Too few arguments to `use if' (some code returning an empty list in list context?)" | ||
| 8 | unless @_ >= 2; | ||||
| 9 | 2 | 200ns | return unless shift; # CONDITION | ||
| 10 | |||||
| 11 | 2 | 500ns | my $p = $_[0]; # PACKAGE | ||
| 12 | 2 | 12µs | 2 | 6µs | (my $file = "$p.pm") =~ s!::!/!g; # spent 6µs making 2 calls to if::CORE:subst, avg 3µs/call |
| 13 | 2 | 1µs | require $file; # Works even if $_[0] is a keyword (like open) | ||
| 14 | 2 | 22µs | 2 | 3µs | my $m = $p->can($method); # spent 3µs making 2 calls to UNIVERSAL::can, avg 2µs/call |
| 15 | 2 | 8µs | 1 | 1.09ms | goto &$m if $m; # spent 1.09ms making 1 call to metaclass::import |
| 16 | } | ||||
| 17 | |||||
| 18 | 6 | 14µs | 2 | 42µs | # spent 7µs within if::import which was called 2 times, avg 3µs/call:
# once (4µs+0s) by Moose::Object::BEGIN@12 at line 12 of Moose/Object.pm
# once (3µs+0s) by Moose::Object::BEGIN@13 at line 13 of Moose/Object.pm # spent 42µs making 2 calls to if::work, avg 21µs/call |
| 19 | sub unimport { shift; unshift @_, 0; goto &work } | ||||
| 20 | |||||
| 21 | 1 | 3µs | 1; | ||
| 22 | __END__ | ||||
| 23 | |||||
| 24 | =head1 NAME | ||||
| 25 | |||||
| 26 | if - C<use> a Perl module if a condition holds | ||||
| 27 | |||||
| 28 | =head1 SYNOPSIS | ||||
| 29 | |||||
| 30 | use if CONDITION, MODULE => ARGUMENTS; | ||||
| 31 | |||||
| 32 | =head1 DESCRIPTION | ||||
| 33 | |||||
| 34 | The construct | ||||
| 35 | |||||
| 36 | use if CONDITION, MODULE => ARGUMENTS; | ||||
| 37 | |||||
| 38 | has no effect unless C<CONDITION> is true. In this case the effect is | ||||
| 39 | the same as of | ||||
| 40 | |||||
| 41 | use MODULE ARGUMENTS; | ||||
| 42 | |||||
| 43 | Above C<< => >> provides necessary quoting of C<MODULE>. If not used (e.g., | ||||
| 44 | no ARGUMENTS to give), you'd better quote C<MODULE> yourselves. | ||||
| 45 | |||||
| 46 | =head1 BUGS | ||||
| 47 | |||||
| 48 | The current implementation does not allow specification of the | ||||
| 49 | required version of the module. | ||||
| 50 | |||||
| 51 | =head1 AUTHOR | ||||
| 52 | |||||
| 53 | Ilya Zakharevich L<mailto:perl-module-if@ilyaz.org>. | ||||
| 54 | |||||
| 55 | =cut | ||||
| 56 | |||||
# spent 6µs within if::CORE:subst which was called 2 times, avg 3µs/call:
# 2 times (6µs+0s) by if::work at line 12 of if.pm, avg 3µs/call |