3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array(9,4,-3,-10); function stddev($array){ //Don Knuth is the $deity of algorithms //http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#III._On-line_algorithm $n = 0; $mean = 0; $M2 = 0; foreach($array as $x){ $n++; $delta = $x - $mean; $mean = $mean + $delta/$n; $M2 = $M2 + $delta*($x - $mean); } $variance = $M2/($n - 1); return sqrt($variance); } stddev($array); ?>

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).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.40.0070.00718.66
8.3.30.0030.01019.09
8.3.20.0070.00020.34
8.3.10.0060.00323.66
8.3.00.0000.00819.14
8.2.170.0160.00022.96
8.2.160.0120.00320.47
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0000.00820.66
8.2.110.0040.00422.31
8.2.100.0040.00817.91
8.2.90.0040.00419.09
8.2.80.0030.00517.97
8.2.70.0040.00417.63
8.2.60.0040.00418.04
8.2.50.0000.00818.07
8.2.40.0050.00320.01
8.2.30.0000.00718.24
8.2.20.0000.00817.73
8.2.10.0050.00318.16
8.2.00.0000.00717.64
8.1.270.0040.00423.91
8.1.260.0040.00426.35
8.1.250.0090.00628.09
8.1.240.0070.00322.00
8.1.230.0110.00019.09
8.1.220.0030.00517.79
8.1.210.0080.00018.77
8.1.200.0090.00017.23
8.1.190.0040.00417.22
8.1.180.0050.00318.10
8.1.170.0030.00618.59
8.1.160.0040.00422.02
8.1.150.0000.00718.64
8.1.140.0000.00717.37
8.1.130.0030.00317.39
8.1.120.0000.00717.35
8.1.110.0050.00317.38
8.1.100.0050.00217.44
8.1.90.0070.00017.48
8.1.80.0000.00717.38
8.1.70.0000.00717.34
8.1.60.0040.00417.65
8.1.50.0000.00917.51
8.1.40.0000.00717.53
8.1.30.0050.00317.54
8.1.20.0020.00517.55
8.1.10.0020.00517.47
8.1.00.0050.00217.52
8.0.300.0080.00018.77
8.0.290.0040.00417.16
8.0.280.0030.00318.45
8.0.270.0030.00317.25
8.0.260.0000.00716.93
8.0.250.0060.00016.85
8.0.240.0040.00416.88
8.0.230.0000.00716.79
8.0.220.0000.00716.76
8.0.210.0070.00016.80
8.0.200.0070.00016.84
8.0.190.0030.00416.99
8.0.180.0030.00516.82
8.0.170.0040.00416.94
8.0.160.0000.00716.91
8.0.150.0040.00416.84
8.0.140.0030.00716.86
8.0.130.0070.00013.36
8.0.120.0050.00316.86
8.0.110.0070.00016.87
8.0.100.0090.00016.78
8.0.90.0040.00416.89
8.0.80.0070.01016.88
8.0.70.0070.00016.76
8.0.60.0070.00016.80
8.0.50.0000.00716.76
8.0.30.0070.01617.12
8.0.20.0080.01017.40
8.0.10.0040.00416.96
8.0.00.0110.00916.79
7.4.330.0000.00515.05
7.4.320.0070.00016.48
7.4.300.0060.00316.51
7.4.290.0000.00716.52
7.4.280.0030.00516.57
7.4.270.0000.00716.48
7.4.260.0030.00616.54
7.4.250.0000.00716.38
7.4.240.0030.00316.60
7.4.230.0070.00016.62
7.4.220.0060.01016.55
7.4.210.0070.00916.55
7.4.200.0040.00416.34
7.4.190.0030.00316.68
7.4.160.0040.01416.44
7.4.150.0060.01117.40
7.4.140.0120.00517.86
7.4.130.0100.00716.45
7.4.120.0070.00916.58
7.4.110.0130.00316.36
7.4.100.0150.00716.55
7.4.90.0040.01316.29
7.4.80.0150.00619.39
7.4.70.0130.00916.46
7.4.60.0130.00616.67
7.4.50.0040.00416.54
7.4.40.0090.00916.45
7.4.30.0030.01416.70
7.4.00.0110.00414.85
7.3.330.0000.00513.36
7.3.320.0050.00013.38
7.3.310.0070.00016.35
7.3.300.0000.00716.36
7.3.290.0080.00716.35
7.3.280.0110.00916.35
7.3.270.0130.01017.40
7.3.260.0090.01216.37
7.3.250.0080.01316.54
7.3.240.0120.00416.41
7.3.230.0100.00616.61
7.3.210.0040.01516.50
7.3.200.0080.00819.39
7.3.190.0030.01416.70
7.3.180.0130.00316.30
7.3.170.0050.01016.45
7.3.160.0120.00316.31
7.3.120.0060.01014.86
7.3.110.0090.00514.82
7.3.100.0050.00914.90
7.3.90.0050.01114.94
7.3.80.0040.00914.84
7.3.70.0090.00514.78
7.3.60.0060.00614.74
7.3.50.0040.00714.64
7.3.40.0090.00514.74
7.3.30.0080.00514.80
7.3.20.0050.01016.50
7.3.10.0070.00816.49
7.3.00.0050.01016.61
7.2.330.0100.00716.73
7.2.320.0000.01816.78
7.2.310.0160.00616.79
7.2.300.0120.00616.66
7.2.290.0160.00716.74
7.2.240.0070.00715.13
7.2.230.0030.01315.04
7.2.220.0080.00815.03
7.2.210.0040.01115.11
7.2.200.0090.00615.05
7.2.190.0050.01015.13
7.2.180.0090.00714.84
7.2.170.0050.01115.02
7.2.160.0060.01115.08
7.2.150.0090.00316.86
7.2.140.0090.00316.89
7.2.130.0080.00716.87
7.2.120.0020.01116.67
7.2.110.0090.00716.88
7.2.100.0030.00616.84
7.2.90.0090.00616.95
7.2.80.0070.00516.75
7.2.70.0040.01316.90
7.2.60.0030.01116.84
7.2.50.0070.00716.88
7.2.40.0040.00916.84
7.2.30.0040.01116.70
7.2.20.0080.00616.89
7.2.10.0080.00816.67
7.2.00.0040.01017.68
7.1.330.0030.01215.75
7.1.320.0020.00915.60
7.1.310.0070.00815.68
7.1.300.0000.01415.69
7.1.290.0090.00515.73
7.1.280.0030.01215.83
7.1.270.0050.00915.88
7.1.260.0080.00515.86
7.1.250.0050.00715.69
7.1.100.0070.01017.93
7.1.70.0030.01217.03
7.1.60.0100.01419.46
7.1.50.0060.01516.86
7.1.00.0030.07722.36
7.0.200.0070.00716.49
7.0.140.0070.07021.97
7.0.60.0030.05319.82
7.0.50.0000.04317.88
7.0.40.0070.04020.24
7.0.30.0430.07020.24
7.0.20.0370.07720.15
7.0.10.0070.08320.30
7.0.00.0000.04720.16
5.6.280.0030.07320.86
5.6.210.0200.06720.67
5.6.200.0070.06318.27
5.6.190.0070.06720.60
5.6.180.0300.05320.41
5.6.170.0170.06020.56
5.6.160.0070.04720.46
5.6.150.0030.08318.19
5.6.140.0130.04718.27
5.6.130.0000.07318.17
5.6.120.0070.08321.13
5.6.110.0100.06021.02
5.6.100.0100.08020.98
5.6.90.0070.08721.13
5.6.80.0030.04720.39
5.5.350.3770.04320.34
5.5.340.0100.08017.98
5.5.330.0100.07020.44
5.5.320.0030.07320.42
5.5.310.0230.05720.36
5.5.300.0000.04317.98
5.5.290.0030.07718.09
5.5.280.0130.07720.77
5.5.270.0030.08020.88
5.5.260.0070.08720.77
5.5.250.0030.09320.78
5.5.240.0330.06720.23
5.4.450.0300.03719.64
5.4.440.0300.05319.18
5.4.430.0270.05719.56
5.4.420.0430.06019.30
5.4.410.0270.07719.14
5.4.400.0270.07719.07
5.4.390.0200.04019.34
5.4.380.0230.07319.09
5.4.370.0270.06318.85
5.4.360.0270.04718.98
5.4.350.0230.06019.09
5.4.340.0270.04719.10
5.4.320.0270.05018.86
5.4.310.0270.05019.32
5.4.300.0300.07019.05
5.4.290.0270.06719.05
5.4.280.0300.04719.22
5.4.270.0400.05719.21
5.4.260.0270.06719.21
5.4.250.0400.03719.21
5.4.240.0230.04719.30
5.4.230.0330.03718.86
5.4.220.0300.05019.09
5.4.210.0230.03718.86
5.4.200.0230.05019.08
5.4.190.0200.04319.21
5.4.180.0300.04719.07
5.4.170.0300.04319.14
5.4.160.0370.05018.93
5.4.150.0230.03318.93
5.4.140.0200.04316.51
5.4.130.0200.04016.49
5.4.120.0230.03016.40
5.4.110.0170.03716.54
5.4.100.0200.03016.40
5.4.90.0230.03016.57
5.4.80.0130.03716.29
5.4.70.0170.04016.44
5.4.60.0200.04316.43
5.4.50.0200.04016.32
5.4.40.0170.03716.52
5.4.30.0170.04016.48
5.4.20.0170.03316.48
5.4.10.0230.04016.18
5.4.00.0200.04715.73
5.3.290.0300.07314.89
5.3.280.0270.05014.68
5.3.270.0270.04014.51
5.3.260.0230.05314.76
5.3.250.0130.04014.65
5.3.240.0230.04014.52
5.3.230.0200.03714.60
5.3.220.0200.03714.57
5.3.210.0270.03714.46
5.3.200.0170.03714.48
5.3.190.0170.03714.64
5.3.180.0230.03014.61
5.3.170.0200.03314.52
5.3.160.0170.03714.48
5.3.150.0200.04314.55
5.3.140.0200.03314.56
5.3.130.0130.04014.47
5.3.120.0200.03314.59
5.3.110.0170.03714.46
5.3.100.0100.04314.09
5.3.90.0230.04013.94
5.3.80.0100.04314.10
5.3.70.0170.04014.05
5.3.60.0130.04013.91
5.3.50.0300.02714.11
5.3.40.0130.04014.06
5.3.30.0130.04013.83
5.3.20.0230.03013.80
5.3.10.0100.05013.73
5.3.00.0230.04013.55
5.2.170.0130.03711.74
5.2.160.0130.03711.74
5.2.150.0170.03711.74
5.2.140.0170.02711.74
5.2.130.0130.03011.74
5.2.120.0200.02311.74
5.2.110.0170.02711.74
5.2.100.0070.03711.74
5.2.90.0130.03011.74
5.2.80.0130.03011.74
5.2.70.0070.04711.74
5.2.60.0130.03011.74
5.2.50.0070.03711.74
5.2.40.0100.03011.74
5.2.30.0100.03011.74
5.2.20.0130.05711.74
5.2.10.0170.04711.74
5.2.00.0130.05711.74
5.1.60.0200.05011.74
5.1.50.0130.05711.74
5.1.40.0200.04011.74
5.1.30.0170.03311.74
5.1.20.0200.04711.74
5.1.10.0230.03311.74
5.1.00.0130.03011.74
5.0.50.0070.04711.74
5.0.40.0200.02711.74
5.0.30.0130.04711.74
5.0.20.0070.04011.74
5.0.10.0100.04311.74
5.0.00.0100.04311.74
4.4.90.0070.01311.74
4.4.80.0030.01711.74
4.4.70.0070.02711.74
4.4.60.0100.03311.74
4.4.50.0070.01711.74
4.4.40.0070.05311.74
4.4.30.0100.03011.74
4.4.20.0170.03011.74
4.4.10.0100.02311.74
4.4.00.0070.03011.74
4.3.110.0130.02311.74
4.3.100.0100.02711.74
4.3.90.0100.02011.74
4.3.80.0100.02711.74
4.3.70.0170.02711.74
4.3.60.0070.03711.74
4.3.50.0170.03011.74
4.3.40.0070.05311.74
4.3.30.0030.03711.74
4.3.20.0100.03011.74
4.3.10.0100.03011.74
4.3.00.0030.02711.74

preferences:
42.96 ms | 400 KiB | 5 Q