3v4l.org

run code in 300+ PHP versions simultaneously
<?php $z1 = "abc"; $out = "a"; for ($i = 0; $i < strlen($z1); $i++) { $out[$i] = $z1[$i]; // $out = $out.$z1[$i]; } //print_r ($out); echo $out;

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)
8.3.60.0130.00616.63
8.3.50.0030.01216.48
8.3.40.0040.01118.81
8.3.30.0120.00318.73
8.3.20.0040.00418.75
8.3.10.0000.00820.40
8.3.00.0080.00019.25
8.2.180.0160.00616.63
8.2.170.0100.00722.96
8.2.160.0030.01418.83
8.2.150.0030.00524.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0000.00818.63
8.2.110.0060.00320.22
8.2.100.0060.00617.84
8.2.90.0080.00019.17
8.2.80.0040.00419.34
8.2.70.0040.00417.50
8.2.60.0040.00417.93
8.2.50.0030.00518.07
8.2.40.0060.00318.16
8.2.30.0030.00618.03
8.2.20.0060.00319.50
8.2.10.0040.00417.74
8.2.00.0050.00317.61
8.1.280.0110.00425.92
8.1.270.0000.00724.66
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.90
8.1.230.0100.00321.10
8.1.220.0060.00318.77
8.1.210.0000.00719.02
8.1.200.0000.00917.36
8.1.190.0000.00717.52
8.1.180.0030.00618.10
8.1.170.0050.00318.89
8.1.160.0000.00818.88
8.1.150.0040.00418.54
8.1.140.0000.00717.36
8.1.130.0000.00717.81
8.1.120.0050.00517.46
8.1.110.0040.00417.31
8.1.100.0040.00417.50
8.1.90.0040.00417.48
8.1.80.0000.00717.33
8.1.70.0030.00317.35
8.1.60.0000.00917.53
8.1.50.0080.00017.46
8.1.40.0040.00417.50
8.1.30.0000.00917.66
8.1.20.0000.00817.65
8.1.10.0000.00717.52
8.1.00.0050.00317.50
8.0.300.0000.00819.94
8.0.290.0040.00416.63
8.0.280.0030.00318.45
8.0.270.0030.00317.15
8.0.260.0000.00716.80
8.0.250.0050.00316.95
8.0.240.0040.00416.94
8.0.230.0040.00417.00
8.0.220.0000.00616.89
8.0.210.0070.00016.73
8.0.200.0030.00316.93
8.0.190.0040.00416.93
8.0.180.0040.00416.91
8.0.170.0040.00416.86
8.0.160.0000.00717.01
8.0.150.0040.00416.93
8.0.140.0100.00016.86
8.0.130.0030.00313.35
8.0.120.0050.00316.82
8.0.110.0070.00016.68
8.0.100.0080.00016.93
8.0.90.0000.00716.95
8.0.80.0080.01216.84
8.0.70.0070.00016.90
8.0.60.0000.00716.73
8.0.50.0030.00516.71
8.0.30.0070.01117.16
8.0.20.0130.00617.22
8.0.10.0040.00417.06
8.0.00.0160.00316.78
7.4.330.0030.00313.00
7.4.320.0000.00616.59
7.4.300.0030.00316.51
7.4.290.0060.00016.59
7.4.280.0040.00416.51
7.4.270.0040.00416.50
7.4.260.0030.00313.27
7.4.250.0000.00816.50
7.4.240.0080.00016.62
7.4.230.0000.00716.62
7.4.220.0110.01116.64
7.4.210.0100.01016.44
7.4.200.0000.00716.34
7.4.190.0000.00716.51
7.4.160.0030.01216.54
7.4.150.0090.01516.52
7.4.140.0110.00716.49
7.4.130.0160.00416.48
7.4.120.0130.00516.47
7.4.110.0090.00916.36
7.4.100.0120.00416.73
7.4.90.0070.01116.66
7.4.80.0090.00916.61
7.4.70.0080.00816.63
7.4.60.0150.00416.43
7.4.50.0060.00016.61
7.4.40.0090.00916.53
7.4.30.0120.00316.73
7.4.00.0060.00614.89
7.3.330.0030.00313.16
7.3.320.0030.00312.99
7.3.310.0030.00316.47
7.3.300.0030.00316.36
7.3.290.0070.01016.30
7.3.280.0050.01016.31
7.3.270.0100.00716.54
7.3.260.0080.00916.38
7.3.250.0110.00816.34
7.3.240.0120.00316.63
7.3.230.0030.01316.41
7.3.210.0040.01416.46
7.3.200.0140.00419.39
7.3.190.0110.00716.62
7.3.180.0090.00616.26
7.3.170.0080.00816.37
7.3.160.0120.00916.57
7.3.120.0100.00715.05
7.3.10.0040.00716.87
7.3.00.0070.00716.81
7.2.330.0150.00416.62
7.2.320.0060.01516.30
7.2.310.0140.01116.68
7.2.300.0150.00316.70
7.2.290.0070.01016.79
7.2.130.0060.00616.99
7.2.120.0030.01016.82
7.2.110.0040.01117.04
7.2.100.0070.00317.06
7.2.90.0030.00817.05
7.2.80.0060.00316.93
7.2.70.0080.00417.00
7.2.60.0000.01216.73
7.2.50.0040.00416.88
7.2.40.0070.00716.82
7.2.30.0060.01116.94
7.2.20.0040.00716.63
7.2.10.0070.00717.11
7.2.00.0040.01018.11
7.1.250.0060.00315.77
7.1.100.0110.00017.76
7.1.70.0040.00417.08
7.1.60.0040.02219.31
7.1.50.0130.00716.63
7.1.00.0000.07322.43
7.0.200.0000.00816.52
7.0.140.0070.07021.97
7.0.120.0000.06022.05
7.0.60.0270.07019.94
7.0.50.0070.08317.89
7.0.40.0170.08020.04
7.0.30.0070.06320.12
7.0.20.0070.07720.12
7.0.10.0130.07720.07
7.0.00.0000.07020.07
5.6.280.0030.07321.09
5.6.210.0300.06320.64
5.6.200.0030.08318.19
5.6.190.0170.08020.62
5.6.180.0070.04020.48
5.6.170.0130.04320.39
5.6.160.0100.08320.66
5.6.150.0070.08020.40
5.6.140.0030.09020.27
5.6.130.0070.06320.39
5.6.120.0130.07720.18
5.6.110.0100.08320.42
5.6.100.0070.08320.26
5.6.90.0200.07320.39
5.6.80.0100.06319.75
5.6.70.0030.09019.69
5.6.60.0030.08719.75
5.6.50.0030.08019.79
5.6.40.0000.04719.65
5.6.30.0030.07019.79
5.6.20.0030.04019.48
5.6.10.0070.07019.79
5.6.00.0030.05019.66
5.5.350.0000.04020.43
5.5.340.0030.07317.96
5.5.330.0070.04020.44
5.5.320.0130.06720.23
5.5.310.0070.06720.36
5.5.300.0030.09320.23
5.5.290.0070.05020.23
5.5.280.0070.04719.91
5.5.270.0030.08720.19
5.5.260.0100.08720.11
5.5.250.0030.05320.04
5.5.240.0070.06019.36
5.5.230.0000.06719.54
5.5.220.0170.07319.65
5.5.210.0100.08019.31
5.5.200.0070.05019.55
5.5.190.0070.05319.28
5.5.180.0070.05019.32
5.5.160.0070.07719.57
5.5.150.0200.03019.25
5.5.140.0170.07019.55
5.5.130.0030.08319.31
5.5.120.0030.04319.46
5.5.110.0100.05719.46
5.5.100.0170.07019.39
5.5.90.0030.05719.16
5.5.80.0070.08019.15
5.5.70.0000.08719.38
5.5.60.0070.08319.47
5.5.50.0000.08719.16
5.5.40.0070.06019.46
5.5.30.0170.07319.33
5.5.20.0030.08719.40
5.5.10.0130.04319.41
5.5.00.0030.04719.44
5.4.450.0200.05719.50
5.4.440.0070.08319.50
5.4.430.0030.05019.41
5.4.420.0070.07019.24
5.4.410.0070.05019.34
5.4.400.0030.05019.08
5.4.390.0100.04719.08
5.4.380.0100.06018.92
5.4.370.0200.06318.91
5.4.360.0070.03718.96
5.4.350.0030.07318.91
5.4.340.0000.04719.18
5.4.320.0070.06019.14
5.4.310.0170.07019.14
5.4.300.0070.04718.80
5.4.290.0030.05018.79
5.4.280.0070.07319.14
5.4.270.0000.04019.14
5.4.260.0100.07018.91
5.4.250.0130.04318.78
5.4.240.0070.06319.17
5.4.230.0070.08019.16
5.4.220.0100.06718.78
5.4.210.0100.07318.80
5.4.200.0100.07319.17
5.4.190.0100.04319.07
5.4.180.0070.07718.99
5.4.170.0130.06318.78
5.4.160.0100.07719.16
5.4.150.0130.04019.15
5.4.140.0100.07016.39
5.4.130.0100.06316.36
5.4.120.0030.07716.25
5.4.110.0100.07016.36
5.4.100.0100.06316.29
5.4.90.0070.07316.27
5.4.80.0030.07716.41
5.4.70.0030.07316.21
5.4.60.0070.07316.21
5.4.50.0030.06316.38
5.4.40.0070.07316.27
5.4.30.0030.04716.60
5.4.20.0100.07016.30
5.4.10.0100.04016.57
5.4.00.0100.03015.78
5.3.290.0030.06314.54
5.3.280.0070.05714.53
5.3.270.0030.08014.69
5.3.260.0130.04314.55
5.3.250.0030.05014.54
5.3.240.0070.05714.54
5.3.230.0070.07714.68
5.3.220.0170.07314.46
5.3.210.0070.06314.44
5.3.200.0030.05714.50
5.3.190.0070.07714.50
5.3.180.0030.07314.34
5.3.170.0030.05314.65
5.3.160.0000.06714.38
5.3.150.0070.07314.48
5.3.140.0070.07314.49
5.3.130.0100.07314.47
5.3.120.0170.06714.47
5.3.110.0030.05014.48
5.3.100.0030.04313.93
5.3.90.0030.03713.95
5.3.80.0030.03713.95
5.3.70.0100.05013.99
5.3.60.0030.05013.96
5.3.50.0000.04013.88
5.3.40.0030.04013.88
5.3.30.0000.04013.87
5.3.20.0030.03313.78
5.3.10.0000.03713.59
5.3.00.0000.03713.56
5.2.170.0030.03711.11
5.2.160.0130.01711.22
5.2.150.0000.03011.08
5.2.140.0000.03011.02
5.2.130.0000.03311.25
5.2.120.0070.02311.03
5.2.110.0030.02711.03
5.2.100.0000.03011.00
5.2.90.0030.02711.03
5.2.80.0170.02310.97
5.2.70.0070.02710.95
5.2.60.0000.03011.01
5.2.50.0030.02710.95
5.2.40.0000.03010.89
5.2.30.0000.03010.95
5.2.20.0070.02311.11
5.2.10.0030.02710.85
5.2.00.0030.02710.71
5.1.60.0000.0239.99
5.1.50.0000.0279.94
5.1.40.0000.0239.95
5.1.30.0000.02710.32
5.1.20.0030.02310.35
5.1.10.0070.02010.14
5.1.00.0030.0379.97
5.0.50.0000.0238.56
5.0.40.0000.0208.45
5.0.30.0030.0278.21
5.0.20.0030.0178.25
5.0.10.0000.0208.14
5.0.00.0000.0308.06
4.4.90.0070.0107.07
4.4.80.0030.0137.07
4.4.70.0030.0177.07
4.4.60.0030.0137.07
4.4.50.0030.0177.07
4.4.40.0000.0277.07
4.4.30.0000.0177.07
4.4.20.0000.0177.07
4.4.10.0000.0277.07
4.4.00.0030.0237.07
4.3.110.0000.0177.07
4.3.100.0000.0177.07
4.3.90.0000.0177.07
4.3.80.0000.0237.07
4.3.70.0000.0137.07
4.3.60.0070.0107.07
4.3.50.0000.0177.07
4.3.40.0000.0237.07
4.3.30.0000.0137.07
4.3.20.0000.0137.07
4.3.10.0030.0207.07
4.3.00.0000.0137.07

preferences:
45.35 ms | 401 KiB | 5 Q