3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a' . 'b';

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)
8.3.70.0120.00616.63
8.3.60.0140.00418.18
8.3.50.0120.01021.21
8.3.40.0140.00718.42
8.3.30.0100.00618.42
8.3.20.0080.00018.48
8.3.10.0040.00421.00
8.3.00.0040.00421.81
8.2.180.0180.00016.38
8.2.170.0100.00322.96
8.2.160.0070.00720.57
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0050.00221.02
8.2.110.0030.00720.52
8.2.100.0110.00017.59
8.2.90.0000.00719.23
8.2.80.0030.00517.97
8.2.70.0040.00817.63
8.2.60.0080.00017.80
8.2.50.0040.00418.07
8.2.40.0050.00218.16
8.2.30.0040.00421.21
8.2.20.0000.00717.59
8.2.10.0070.00017.66
8.2.00.0080.00317.49
8.1.280.0160.00925.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0030.00628.09
8.1.240.0090.00022.33
8.1.230.0070.00320.85
8.1.220.0060.00318.77
8.1.210.0080.00018.97
8.1.200.0120.00017.00
8.1.190.0040.00417.39
8.1.180.0000.00818.10
8.1.170.0050.00318.52
8.1.160.0080.00318.72
8.1.150.0000.00718.56
8.1.140.0000.00817.28
8.1.130.0070.00017.82
8.1.120.0000.00917.46
8.1.110.0030.00417.22
8.1.100.0040.00417.40
8.1.90.0000.00717.35
8.1.80.0040.00417.38
8.1.70.0070.00017.35
8.1.60.0030.00617.53
8.1.50.0000.00817.34
8.1.40.0060.00317.39
8.1.30.0000.00817.52
8.1.20.0000.00817.44
8.1.10.0040.00417.45
8.1.00.0000.01417.29
8.0.300.0060.00319.85
8.0.290.0030.00517.16
8.0.280.0000.00718.36
8.0.270.0060.00317.18
8.0.260.0060.00316.59
8.0.250.0040.00416.89
8.0.240.0040.00416.78
8.0.230.0020.00516.86
8.0.220.0070.00016.84
8.0.210.0070.00016.82
8.0.200.0040.00416.86
8.0.190.0040.00416.90
8.0.180.0020.00516.87
8.0.170.0040.00416.77
8.0.160.0050.00316.77
8.0.150.0090.00016.63
8.0.140.0000.00716.78
8.0.130.0070.00013.28
8.0.120.0040.00416.79
8.0.110.0040.00416.69
8.0.100.0030.00316.82
8.0.90.0040.00416.80
8.0.80.0030.01416.83
8.0.70.0000.00816.59
8.0.60.0040.00416.71
8.0.50.0040.00416.64
8.0.30.0100.00917.05
8.0.20.0080.01017.40
8.0.10.0000.00716.87
8.0.00.0070.01016.67
7.4.330.0050.00014.72
7.4.320.0030.00316.29
7.4.300.0000.00816.56
7.4.290.0000.00716.48
7.4.280.0000.00716.43
7.4.270.0070.00016.35
7.4.260.0030.00313.19
7.4.250.0000.00916.40
7.4.240.0030.00316.52
7.4.230.0030.00316.18
7.4.220.0060.01216.55
7.4.210.0070.00716.55
7.4.200.0040.00316.26
7.4.190.0030.00316.48
7.4.160.0060.01216.54
7.4.150.0140.00917.40
7.4.140.0140.00517.86
7.4.130.0070.01216.40
7.4.120.0110.00616.31
7.4.110.0100.00716.49
7.4.100.0100.01316.29
7.4.90.0150.00516.47
7.4.80.0120.00619.39
7.4.70.0170.00616.29
7.4.60.0030.01316.52
7.4.50.0040.00416.23
7.4.40.0040.01522.52
7.4.30.0030.01316.46
7.4.00.0030.01215.09
7.3.330.0000.00513.01
7.3.320.0020.00212.93
7.3.310.0020.00516.21
7.3.300.0070.00016.17
7.3.290.0040.01116.13
7.3.280.0110.00516.11
7.3.270.0180.00017.40
7.3.260.0090.01018.24
7.3.250.0110.00816.17
7.3.240.0180.00616.14
7.3.230.0060.01016.39
7.3.210.0160.00616.17
7.3.200.0090.00919.39
7.3.190.0120.00916.31
7.3.180.0080.00816.49
7.3.170.0100.00716.43
7.3.160.0090.00616.53
7.3.120.0040.01114.57
7.2.330.0120.00616.26
7.2.320.0100.01016.53
7.2.310.0130.00316.20
7.2.300.0040.01916.60
7.2.290.0090.00616.40
7.2.60.0070.01016.87
7.2.00.0060.00618.88
7.1.200.0060.00615.36
7.1.100.0060.00617.74
7.1.70.0080.00816.68
7.1.60.0130.01019.40
7.1.50.0070.01716.48
7.1.00.0030.03322.37
7.0.200.0130.00316.63
7.0.140.0030.06721.95
7.0.60.0000.08319.96
7.0.50.0030.05717.79
7.0.40.0200.07720.06
7.0.30.0330.07320.04
7.0.20.0200.05320.04
7.0.10.0200.07320.13
7.0.00.0070.05720.17
5.6.280.0100.06720.98
5.6.210.0100.07720.56
5.6.200.0030.04018.09
5.6.190.0130.08320.41
5.6.180.0300.05720.56
5.6.170.0230.04020.33
5.6.160.0130.07020.41
5.6.150.0070.04318.15
5.6.140.0070.05018.12
5.6.130.0030.04318.19
5.6.120.0170.08021.13
5.6.110.0070.09020.98
5.6.100.0130.08021.02
5.6.90.0030.08321.09
5.6.80.0100.07320.38
5.5.350.0500.06720.39
5.5.340.0100.08317.92
5.5.330.0170.07320.33
5.5.320.0330.07720.29
5.5.310.0300.06320.23
5.5.300.0000.08018.02
5.5.290.0100.07317.88
5.5.280.0000.06320.79
5.5.270.0100.08020.67
5.5.260.0100.04320.79
5.5.250.0070.08720.69
5.5.240.0030.07320.27
5.4.450.0700.05319.56
5.4.440.0400.05719.63
5.4.430.0930.05019.23
5.4.420.0130.05319.32
5.4.410.0130.05018.95
5.4.400.0070.06718.74
5.4.390.0200.04018.59
5.4.380.0230.05318.74
5.4.370.0130.04718.55
5.4.360.0170.04018.50
5.4.350.0090.03311.98
5.4.340.0040.03611.96
5.4.320.0070.03412.45
5.4.310.0110.04912.45
5.4.300.0050.04412.45
5.4.290.0050.04612.45
5.4.280.0070.04212.35
5.4.270.0090.04512.35
5.4.260.0070.05012.34
5.4.250.0070.04312.34
5.4.240.0080.04012.33
5.4.230.0110.06212.33
5.4.220.0080.04612.33
5.4.210.0090.04112.33
5.4.200.0070.04512.33
5.4.190.0090.04112.32
5.4.180.0110.05912.32
5.4.170.0080.06812.33
5.4.160.0100.05112.33
5.4.150.0080.04212.32
5.4.140.0080.04512.01
5.4.130.0060.04512.00
5.4.120.0060.04711.96
5.4.110.0070.04111.95
5.4.100.0050.04211.95
5.4.90.0070.04711.95
5.4.80.0070.04511.95
5.4.70.0070.04211.95
5.4.60.0080.04511.95
5.4.50.0060.04411.95
5.4.40.0040.05011.94
5.4.30.0090.04111.93
5.4.20.0070.04711.93
5.4.10.0090.04711.93
5.4.00.0070.04911.42
5.3.290.0060.04412.80
5.3.280.0090.04812.71
5.3.270.0070.04512.73
5.3.260.0070.04612.72
5.3.250.0070.04212.72
5.3.240.0070.04312.72
5.3.230.0100.04112.71
5.3.220.0090.04212.68
5.3.210.0070.06212.68
5.3.200.0060.04412.68
5.3.190.0060.04512.68
5.3.180.0070.04612.67
5.3.170.0090.04212.67
5.3.160.0080.04412.67
5.3.150.0070.04412.67
5.3.140.0090.05312.66
5.3.130.0080.04612.66
5.3.120.0080.04812.66
5.3.110.0080.04512.66
5.3.100.0050.04312.12
5.3.90.0060.04212.08
5.3.80.0050.04112.08
5.3.70.0080.03912.08
5.3.60.0030.04412.07
5.3.50.0050.04212.00
5.3.40.0050.04312.00
5.3.30.0050.04211.94
5.3.20.0070.04011.71
5.3.10.0060.04111.67
5.3.00.0060.04211.66

preferences:
38.84 ms | 401 KiB | 5 Q