| File: | lib/App/plackbench/Stats.pm |
| Coverage: | 100.0% |
| line | stmt | bran | cond | sub | time | code |
|---|---|---|---|---|---|---|
| 1 | package App::plackbench::Stats; | |||||
| 2 | ||||||
| 3 | 6 6 6 | 32 13 226 | use strict; | |||
| 4 | 6 6 6 | 34 12 176 | use warnings; | |||
| 5 | 6 6 6 | 293 16909 37 | use autodie; | |||
| 6 | 6 6 6 | 29508 39 319 | use v5.10; | |||
| 7 | ||||||
| 8 | 6 6 6 | 36 13 4988 | use List::Util qw( sum reduce ); | |||
| 9 | ||||||
| 10 | sub new { | |||||
| 11 | 28 | 72 | my $class = shift; | |||
| 12 | 28 71 | 97 152 | my @self = sort { $a <=> $b } @_; | |||
| 13 | 28 | 221 | return bless \@self, $class; | |||
| 14 | } | |||||
| 15 | ||||||
| 16 | sub insert { | |||||
| 17 | 44 | 101 | my $self = shift; | |||
| 18 | 44 | 81 | my $n = shift; | |||
| 19 | ||||||
| 20 | 44 | 118 | my $index = $self->count(); | |||
| 21 | ||||||
| 22 | 44 | 127 | for (my $i = 0; $i < $self->count(); $i++) { | |||
| 23 | 74 | 242 | if ($n < $self->[$i]) { | |||
| 24 | 33 | 62 | $index = $i; | |||
| 25 | 33 | 74 | last; | |||
| 26 | } | |||||
| 27 | } | |||||
| 28 | ||||||
| 29 | 44 44 | 90 123 | splice(@{$self}, $index, 0, $n); | |||
| 30 | ||||||
| 31 | 44 | 117 | return $index; | |||
| 32 | } | |||||
| 33 | ||||||
| 34 | sub count { | |||||
| 35 | 188 | 357 | my $self = shift; | |||
| 36 | 188 188 | 350 633 | return scalar @{$self}; | |||
| 37 | } | |||||
| 38 | ||||||
| 39 | sub mean { | |||||
| 40 | 7 | 16 | my $self = shift; | |||
| 41 | ||||||
| 42 | 7 | 19 | return unless $self->count(); | |||
| 43 | 6 6 | 15 43 | return sum(@{$self}) / $self->count(); | |||
| 44 | } | |||||
| 45 | ||||||
| 46 | sub median { | |||||
| 47 | 5 | 12 | my $self = shift; | |||
| 48 | ||||||
| 49 | 5 | 14 | return unless $self->count(); | |||
| 50 | ||||||
| 51 | 4 | 10 | if ($self->count() % 2 == 1) { | |||
| 52 | 2 | 5 | return $self->[$self->count() / 2]; | |||
| 53 | } | |||||
| 54 | ||||||
| 55 | 2 | 6 | my $index_a = ($self->count() / 2) + 0.5; | |||
| 56 | 2 | 5 | my $index_b = ($self->count() / 2) - 0.5; | |||
| 57 | 2 | 6 | my $a = $self->[$index_a]; | |||
| 58 | 2 | 6 | my $b = $self->[$index_b]; | |||
| 59 | 2 | 8 | return ($a + $b) / 2; | |||
| 60 | } | |||||
| 61 | ||||||
| 62 | sub min { | |||||
| 63 | 4 | 9 | my $self = shift; | |||
| 64 | ||||||
| 65 | 4 | 11 | return unless $self->count(); | |||
| 66 | 3 | 16 | return $self->[0]; | |||
| 67 | } | |||||
| 68 | ||||||
| 69 | sub max { | |||||
| 70 | 4 | 9 | my $self = shift; | |||
| 71 | 4 | 11 | return unless $self->count(); | |||
| 72 | 3 | 30 | return $self->[-1]; | |||
| 73 | } | |||||
| 74 | ||||||
| 75 | sub standard_deviation { | |||||
| 76 | 3 | 6 | my $self = shift; | |||
| 77 | ||||||
| 78 | 3 | 9 | return 0 unless $self->count(); | |||
| 79 | 2 | 7 | my $mean = $self->mean(); | |||
| 80 | ||||||
| 81 | my $differences_sum = reduce { | |||||
| 82 | 18 | 46 | $a + ( ( $b - $mean )**2 ); | |||
| 83 | } | |||||
| 84 | 2 2 | 14 37 | 0, @{$self}; | |||
| 85 | ||||||
| 86 | 2 | 11 | my $sd = sqrt( $differences_sum / $self->count() ); | |||
| 87 | 2 | 8 | return $sd; | |||
| 88 | } | |||||
| 89 | ||||||
| 90 | sub percentile { | |||||
| 91 | 13 | 29 | my $self = shift; | |||
| 92 | 13 | 30 | my $percentile = shift; | |||
| 93 | ||||||
| 94 | 13 | 32 | my $n = int(( $percentile / 100 ) * $self->count() + 0.5) - 1; | |||
| 95 | 13 | 41 | $n = 0 if $n < 0; | |||
| 96 | 13 | 43 | return $self->[$n]; | |||
| 97 | } | |||||
| 98 | ||||||
| 99 | 1; | |||||
| 100 | ||||||