Online PHP editor | perf for vt7eP

@ 2021-06-10T03:17:59Z

<?php
class Stress {
    const ABSENT = 0;   // Ausente
    const SOFT = 1;     // Ameno
    const MODERATE = 2; // Moderado
    const SEVERE = 3;   // Severo
    const CRITICAL = 4; // Morte/Crítico
    
    const RATING = [
        self::ABSENT     => 'Ausência de estresse térmico',
        self::SOFT       => 'Estresse térmico ameno',
        self::MODERATE   => 'Estresse térmico moderado',
        self::SEVERE     => 'Estresse térmico severo',
        self::CRITICAL   => 'Estresse térmico crítico. Ocorrência de morte.',
    ];
    
    const AMBIGUOUS = [
        // Em 25 graus a 100% de UR temos um moderado:
        250 => [ 100 => Stress::MODERATE ],
        
        // Já na linha dos 26,1 graus temos 3 ambíguos:
        261 => [ 80 => Stress::SOFT, 90 => Stress::MODERATE, 100 => Stress::MODERATE ],
        
        // ...
        433 => [ 30 => Stress::SEVERE ],
        461 => [ 20 => Stress::MODERATE ],
    ];
    
    public $temp;// int
    public $ur;// int
    
    public function __construct( $temp, $ur ) {
        $this->temp = $temp;
        $this->ur = $ur;
    }
    
    public function __toString() {
        $ambiguousRatingIndex = $this->getAmbiguousStressRatingIndex();
        
        if ( $ambiguousRatingIndex !== false )
            return sprintf( 'Classificação (por tabela de desambiguação): %s', self::RATING[ $ambiguousRatingIndex ] );
        else {
            $rating = $this->getGeneralRatingIndex();
            return sprintf( 'Classificação geral do estresse térmico por ausência de ambiguidade: %s', self::RATING[ $rating ] );
        }        
    }
    
    // Primeiro passo da lógica. Busca por ambiguidade:
    private function getAmbiguousStressRatingIndex() {
        $temp = $this->temp;
        $ur = $this->ur;
        
        if ( isset( self::AMBIGUOUS[ $temp ] ) && isset( self::AMBIGUOUS[ $temp ][ $ur ] ) )
            return self::AMBIGUOUS[ $temp ][ $ur ];// int = índice do rótulo encontrado
            
        return false;// boolean false = não encontrou. Podia ser Exception, mas vamos facilitar o código
    }
    
    // Utilizado apenas após confirmada a ausência de ambiguidade
    // ITU = (0,8 x TA + (UR/100) x (TA-14,4) + 46,4)
    private function getGeneralRatingIndex() {
        $temp = $this->temp / 10;// Estávamos trabalhando com valores inteiros para a temperatura. 244 => 24.4
        $ur = $this->ur / 100;
        $ITU = .8 * $temp + $ur * ( $temp - 14.4 ) + 46.4;
        
        if ( $ITU < 72 ) return Stress::ABSENT;
        if ( $ITU < 79 ) return Stress::SOFT;
        if ( $ITU < 90 ) return Stress::MODERATE;
        if ( $ITU < 98 ) return Stress::SEVERE;
        
        return Stress::CRITICAL;
    }
    
}

echo (string)( new Stress( 250, 100 ) ) . "\n";// 25,0 graus / 100% UR
echo (string)( new Stress( 261, 80 ) ) . "\n";// 26,1 graus / 80% UR
echo (string)( new Stress( 261, 90 ) ) . "\n";// 26,1 graus / 90% UR
echo (string)( new Stress( 461, 20 ) ) . "\n";// 46,1 graus / 20% UR (seu exemplo)
echo (string)( new Stress( 433, 30 ) ) . "\n";// 43,3 graus / 30% UR (seu exemplo)

echo (string)( new Stress( 239, 40 ) ) . "\n";
echo (string)( new Stress( 317, 20 ) ) . "\n";
echo (string)( new Stress( 444, 80 ) ) . "\n";

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.3.7	0.019	0.003	16.88
8.3.6	0.014	0.010	16.75
8.3.5	0.009	0.006	17.92
8.3.4	0.009	0.006	18.69
8.3.3	0.013	0.009	18.70
8.3.2	0.004	0.004	24.18
8.3.1	0.008	0.000	24.66
8.3.0	0.003	0.006	26.16
8.2.18	0.009	0.009	25.92
8.2.17	0.004	0.011	19.08
8.2.16	0.014	0.000	22.96
8.2.15	0.007	0.000	25.66
8.2.14	0.000	0.008	24.66
8.2.13	0.004	0.004	26.16
8.2.12	0.004	0.004	19.76
8.2.11	0.009	0.000	20.22
8.2.10	0.006	0.006	17.72
8.2.9	0.004	0.004	20.59
8.2.8	0.003	0.005	18.03
8.2.7	0.003	0.007	17.93
8.2.6	0.004	0.004	18.22
8.2.5	0.008	0.000	18.10
8.2.4	0.006	0.003	19.48
8.2.3	0.000	0.007	18.22
8.2.2	0.005	0.002	18.03
8.2.1	0.006	0.003	19.22
8.2.0	0.004	0.004	19.27
8.1.28	0.008	0.008	25.92
8.1.27	0.000	0.007	23.99
8.1.26	0.004	0.004	26.35
8.1.25	0.008	0.000	28.09
8.1.24	0.000	0.010	23.81
8.1.23	0.005	0.005	20.95
8.1.22	0.004	0.004	17.77
8.1.21	0.003	0.006	19.07
8.1.20	0.003	0.006	17.35
8.1.19	0.004	0.004	17.35
8.1.18	0.010	0.000	18.10
8.1.17	0.006	0.003	18.64
8.1.16	0.003	0.003	19.07
8.1.15	0.000	0.007	18.93
8.1.14	0.007	0.000	18.95
8.1.13	0.003	0.003	17.46
8.1.12	0.005	0.003	17.49
8.1.11	0.007	0.000	17.48
8.1.10	0.000	0.007	17.45
8.1.9	0.007	0.000	17.48
8.1.8	0.003	0.004	17.40
8.1.7	0.003	0.003	17.49
8.1.6	0.006	0.003	17.63
8.1.5	0.003	0.006	17.46
8.1.4	0.006	0.003	17.54
8.1.3	0.009	0.000	17.63
8.1.2	0.008	0.000	17.65
8.1.1	0.005	0.003	17.64
8.1.0	0.009	0.000	17.39
8.0.30	0.004	0.004	19.95
8.0.29	0.009	0.005	16.58
8.0.28	0.004	0.004	18.47
8.0.27	0.007	0.000	17.95
8.0.26	0.003	0.003	16.72
8.0.25	0.000	0.008	16.88
8.0.24	0.004	0.004	16.92
8.0.23	0.000	0.007	16.96
8.0.22	0.004	0.004	16.88
8.0.21	0.000	0.007	16.94
8.0.20	0.003	0.003	16.87
8.0.19	0.004	0.004	17.00
8.0.18	0.003	0.005	16.89
8.0.17	0.004	0.004	16.93
8.0.16	0.004	0.004	16.96
8.0.15	0.004	0.004	16.73
8.0.14	0.000	0.007	16.83
8.0.13	0.003	0.003	13.36
8.0.12	0.000	0.007	16.83
8.0.11	0.000	0.008	16.96
8.0.10	0.000	0.007	16.86
8.0.9	0.008	0.000	16.91
8.0.8	0.006	0.012	16.83
8.0.7	0.003	0.003	16.96
8.0.6	0.003	0.005	16.96
8.0.5	0.004	0.004	16.74
8.0.3	0.035	0.010	16.81
8.0.2	0.024	0.009	16.91
8.0.1	0.036	0.012	17.02
8.0.0	0.025	0.012	16.87
7.4.33	0.000	0.005	15.55
7.4.32	0.004	0.004	16.61
7.4.30	0.004	0.004	16.43
7.4.29	0.000	0.007	16.48
7.4.28	0.003	0.006	16.38
7.4.27	0.000	0.007	16.51
7.4.26	0.000	0.006	13.24
7.4.25	0.003	0.003	16.63
7.4.24	0.006	0.001	16.51
7.4.23	0.006	0.003	16.49
7.4.22	0.002	0.006	16.56
7.4.21	0.007	0.007	16.65
7.4.20	0.005	0.003	16.51
7.4.16	0.021	0.011	16.49
7.4.15	0.016	0.011	16.36
7.4.14	0.022	0.013	16.34
7.4.13	0.029	0.013	16.15
7.4.12	0.027	0.007	16.14
7.4.11	0.020	0.011	16.37
7.4.10	0.020	0.010	16.41
7.4.9	0.030	0.006	16.41
7.4.8	0.023	0.015	16.29
7.4.7	0.028	0.004	16.22
7.4.6	0.021	0.007	16.23
7.4.5	0.018	0.011	16.24
7.4.4	0.026	0.009	16.16
7.4.3	0.022	0.006	16.43
7.4.2	0.018	0.009	16.23
7.4.1	0.015	0.013	16.38
7.4.0	0.011	0.015	16.46
7.3.33	0.000	0.008	16.33
7.3.32	0.000	0.008	13.42
7.3.31	0.003	0.003	16.35
7.3.30	0.007	0.000	16.41
7.3.29	0.003	0.012	16.42
7.3.28	0.023	0.010	16.29
7.3.27	0.017	0.012	16.28
7.3.26	0.018	0.011	16.27
7.3.25	0.030	0.015	16.27
7.3.24	0.025	0.007	16.27
7.3.23	0.033	0.000	16.27
7.3.22	0.033	0.004	16.23
7.3.21	0.014	0.019	16.11
7.3.20	0.023	0.007	16.13
7.3.19	0.017	0.013	16.06
7.3.18	0.023	0.007	16.16
7.3.17	0.019	0.008	16.13
7.3.16	0.022	0.007	16.23
7.3.15	0.023	0.011	16.28
7.3.14	0.024	0.005	16.21
7.3.13	0.020	0.008	16.25
7.3.12	0.018	0.011	16.22
7.3.11	0.025	0.000	16.09
7.3.10	0.015	0.011	16.16
7.3.9	0.027	0.000	16.56
7.3.8	0.015	0.009	16.20
7.3.7	0.024	0.004	16.29
7.3.6	0.020	0.007	16.36
7.3.5	0.025	0.007	16.40
7.3.4	0.022	0.007	16.39
7.3.3	0.019	0.011	16.43
7.3.2	0.025	0.006	16.40
7.3.1	0.012	0.018	16.37
7.3.0	0.022	0.007	16.33

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