3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'This is a string!'; $i = 0; var_dump(implode('', array_map(function($val, $key) { return ($key % 2 ? $val : null); }, str_split($string))));

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)
8.3.60.0100.00316.88
8.3.50.0050.01023.00
8.3.40.0120.00918.89
8.3.30.0120.00919.02
8.3.20.0050.00220.30
8.3.10.0040.00421.73
8.3.00.0080.00019.38
8.2.180.0060.01316.75
8.2.170.0070.01022.96
8.2.160.0070.00722.25
8.2.150.0040.00424.18
8.2.140.0000.00824.66
8.2.130.0060.01226.16
8.2.120.0000.00721.04
8.2.110.0050.00520.29
8.2.100.0040.00817.87
8.2.90.0050.00319.21
8.2.80.0040.00417.97
8.2.70.0060.00317.50
8.2.60.0040.00418.04
8.2.50.0000.00818.07
8.2.40.0000.00818.16
8.2.30.0000.00818.02
8.2.20.0080.00017.77
8.2.10.0000.00718.01
8.2.00.0000.00717.79
8.1.280.0100.00325.92
8.1.270.0050.00222.05
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0040.00423.96
8.1.230.0040.00817.57
8.1.220.0000.00817.78
8.1.210.0040.00418.77
8.1.200.0000.00817.35
8.1.190.0080.00017.23
8.1.180.0000.00818.10
8.1.170.0040.00418.59
8.1.160.0040.00421.93
8.1.150.0050.00218.88
8.1.140.0070.00017.49
8.1.130.0040.00417.88
8.1.120.0000.00717.52
8.1.110.0070.00017.51
8.1.100.0040.00417.46
8.1.90.0040.00417.38
8.1.80.0000.00717.38
8.1.70.0070.00017.45
8.1.60.0040.00417.61
8.1.50.0040.00417.55
8.1.40.0030.00617.53
8.1.30.0000.00817.59
8.1.20.0060.00317.57
8.1.10.0050.00317.56
8.1.00.0030.00517.52
8.0.300.0000.00818.77
8.0.290.0000.00716.63
8.0.280.0000.00818.33
8.0.270.0030.00317.10
8.0.260.0030.00317.25
8.0.250.0030.00316.93
8.0.240.0000.00616.96
8.0.230.0000.00716.98
8.0.220.0030.00316.82
8.0.210.0030.00316.89
8.0.200.0070.00017.07
8.0.190.0050.00217.06
8.0.180.0040.00416.88
8.0.170.0020.00516.99
8.0.160.0000.00816.87
8.0.150.0000.00716.93
8.0.140.0040.00716.98
8.0.130.0030.00313.37
8.0.120.0030.00616.81
8.0.110.0040.00416.95
8.0.100.0070.00016.84
8.0.90.0070.00016.84
8.0.80.0090.01216.86
8.0.70.0000.00717.01
8.0.60.0070.00016.80
8.0.50.0040.00416.98
8.0.30.0150.00717.05
8.0.20.0120.00817.40
8.0.10.0040.00416.94
8.0.00.0070.01216.66
7.4.330.0030.00315.00
7.4.320.0000.00716.54
7.4.300.0030.00316.61
7.4.290.0000.00816.43
7.4.280.0030.00616.49
7.4.270.0070.00016.45
7.4.260.0070.00316.52
7.4.250.0050.00316.47
7.4.240.0030.00516.53
7.4.230.0050.00316.50
7.4.220.0110.00716.39
7.4.210.0110.00416.50
7.4.200.0000.00816.70
7.4.160.0070.01116.33
7.4.150.0060.01217.40
7.4.140.0070.01217.86
7.4.130.0050.01216.59
7.4.120.0080.01116.72
7.4.110.0090.01216.41
7.4.100.0040.01916.51
7.4.90.0100.00716.61
7.4.80.0030.02319.39
7.4.70.0080.00816.68
7.4.60.0130.01016.47
7.4.50.0030.00516.63
7.4.40.0200.00016.54
7.4.30.0060.00916.67
7.4.00.0060.00814.94
7.3.330.0000.00713.32
7.3.320.0030.00313.13
7.3.310.0030.00316.16
7.3.300.0030.00316.18
7.3.290.0100.00416.33
7.3.280.0120.00516.31
7.3.270.0160.00717.40
7.3.260.0060.01116.47
7.3.250.0060.01116.47
7.3.240.0100.00716.28
7.3.230.0160.00016.41
7.3.210.0060.01016.39
7.3.200.0090.00919.39
7.3.190.0180.00316.45
7.3.180.0100.00616.29
7.3.170.0060.00916.60
7.3.160.0150.00616.27
7.3.120.0120.00614.86
7.3.110.0120.00614.67
7.3.100.0070.01114.98
7.3.90.0060.01214.49
7.3.80.0000.01614.66
7.3.70.0090.00314.55
7.3.60.0070.00714.92
7.3.50.0000.01014.85
7.3.40.0070.00414.65
7.3.30.0060.00614.86
7.3.20.0070.01016.40
7.3.10.0040.01116.63
7.3.00.0030.01016.54
7.2.330.0060.01216.34
7.2.320.0120.00616.73
7.2.310.0100.01116.70
7.2.300.0090.01316.48
7.2.290.0120.00416.66
7.2.250.0000.01815.11
7.2.240.0060.01315.04
7.2.230.0130.00614.82
7.2.220.0070.00714.74
7.2.210.0070.01014.83
7.2.200.0060.00614.94
7.2.190.0000.01414.82
7.2.180.0000.01314.98
7.2.170.0000.01014.95
7.2.60.0040.01116.86
7.2.00.0030.01219.42
7.1.330.0070.00715.43
7.1.320.0030.00915.66
7.1.310.0090.00315.62
7.1.300.0070.00715.51
7.1.290.0060.00915.58
7.1.280.0030.00615.67
7.1.270.0000.01315.49
7.1.260.0100.00715.62
7.1.200.0030.00915.64
7.1.100.0070.00718.02
7.1.70.0030.00616.84
7.1.60.0100.01619.40
7.1.50.0110.01116.79
7.1.00.0100.09022.45
7.0.200.0070.00316.56
7.0.140.0070.07022.09
7.0.60.0070.06319.91
7.0.50.0070.08317.88
7.0.40.0130.07320.13
7.0.30.0370.04320.08
7.0.20.0300.03320.16
7.0.10.0300.08720.25
7.0.00.0100.04320.24
5.6.280.0000.07721.10
5.6.210.0130.05020.63
5.6.200.0070.07718.15
5.6.190.0070.08320.39
5.6.180.0230.07320.49
5.6.170.0200.06320.62
5.6.160.0070.08320.71
5.6.150.0030.08318.27
5.6.140.0070.08318.28
5.6.130.0130.05718.25
5.6.120.0000.06321.02
5.6.110.0170.07320.98
5.6.100.0070.06021.08
5.6.90.0170.07021.03
5.6.80.0030.03720.36
5.6.70.0000.03320.38
5.5.350.0100.08720.35
5.5.340.0070.03717.98
5.5.330.0100.03720.35
5.5.320.0430.06720.31
5.5.310.0130.04320.30
5.5.300.0030.04017.98
5.5.290.0100.08017.95
5.5.280.0100.08320.98
5.5.270.0070.03720.84
5.5.260.0030.04020.88
5.5.250.0170.07720.61
5.5.240.3670.03020.27
5.4.450.0200.05319.53
5.4.440.0170.05019.49
5.4.430.0570.04719.40
5.4.420.0370.04319.27
5.4.410.0230.05319.46
5.4.400.0630.03319.23
5.4.390.0400.02719.23
5.4.380.0370.06018.77
5.4.370.0370.07318.79
5.4.360.0270.05718.79
5.4.350.0400.05718.63
5.4.340.0500.05718.70
5.4.320.0050.03712.50
5.4.310.0100.05112.50
5.4.300.0050.03812.50
5.4.290.0130.04012.50
5.4.280.0050.04012.39
5.4.270.0070.04612.39
5.4.260.0050.04512.39
5.4.250.0090.03712.40
5.4.240.0070.04312.39
5.4.230.0090.03712.39
5.4.220.0090.03112.38
5.4.210.0080.03312.39
5.4.200.0080.03912.39
5.4.190.0130.03912.38
5.4.180.0020.04012.38
5.4.170.0030.03912.39
5.4.160.0050.04412.39
5.4.150.0060.04712.39
5.4.140.0080.04212.07
5.4.130.0050.04012.06
5.4.120.0050.04012.02
5.4.110.0030.04212.02
5.4.100.0070.04512.01
5.4.90.0070.04112.01
5.4.80.0090.04412.02
5.4.70.0050.04112.01
5.4.60.0060.03912.01
5.4.50.0140.03712.01
5.4.40.0040.03611.99
5.4.30.0080.03912.00
5.4.20.0070.04011.99
5.4.10.0070.03512.00
5.4.00.0050.03711.49
5.3.290.0050.04312.80
5.3.280.0070.04012.71
5.3.270.0100.03412.73
5.3.260.0090.03912.72
5.3.250.0040.04112.72
5.3.240.0090.04112.72
5.3.230.0040.03912.71
5.3.220.0060.04312.68
5.3.210.0070.03912.68
5.3.200.0070.03912.68
5.3.190.0090.03612.68
5.3.180.0080.04212.68
5.3.170.0120.03512.67
5.3.160.0040.03912.68
5.3.150.0070.04012.67
5.3.140.0100.04112.66
5.3.130.0070.04712.66
5.3.120.0100.04512.66
5.3.110.0060.04112.66
5.3.100.0110.04112.12
5.3.90.0110.03512.10
5.3.80.0060.04012.09
5.3.70.0070.03712.09
5.3.60.0110.03312.08
5.3.50.0050.04512.03
5.3.40.0070.03712.03
5.3.30.0040.04211.98
5.3.20.0080.03811.76
5.3.10.0070.04311.73
5.3.00.0050.04211.72
5.2.170.0050.0299.18
5.2.160.0060.0329.18
5.2.150.0040.0399.18
5.2.140.0030.0359.18
5.2.130.0060.0359.14
5.2.120.0070.0279.14
5.2.110.0090.0339.14
5.2.100.0070.0299.14
5.2.90.0060.0279.14
5.2.80.0070.0279.14
5.2.70.0070.0279.14
5.2.60.0050.0309.09
5.2.50.0050.0309.06
5.2.40.0060.0289.04
5.2.30.0040.0359.01
5.2.20.0060.0299.00
5.2.10.0060.0348.93
5.2.00.0030.0328.78
5.1.60.0060.0328.07
5.1.50.0060.0298.06
5.1.40.0040.0298.05
5.1.30.0060.0298.40
5.1.20.0070.0288.41
5.1.10.0060.0258.14
5.1.00.0050.0348.14
5.0.50.0030.0266.62
5.0.40.0020.0216.48
5.0.30.0050.0406.29
5.0.20.0040.0296.26
5.0.10.0040.0216.24
5.0.00.0060.0286.23
4.4.90.0040.0144.77
4.4.80.0030.0154.75
4.4.70.0020.0174.75
4.4.60.0050.0144.76
4.4.50.0010.0194.77
4.4.40.0010.0264.71
4.4.30.0050.0174.76
4.4.20.0040.0164.84
4.4.10.0010.0174.85
4.4.00.0020.0264.75
4.3.110.0030.0154.67
4.3.100.0020.0164.66
4.3.90.0030.0144.63
4.3.80.0020.0254.58
4.3.70.0030.0154.63
4.3.60.0010.0174.63
4.3.50.0040.0144.62
4.3.40.0030.0234.54
4.3.30.0030.0153.29
4.3.20.0020.0163.27
4.3.10.0020.0153.22
4.3.00.0200.01715.92

preferences:
44.51 ms | 400 KiB | 5 Q