3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['a', 'b', 'c']; $b = $a . 'dd'; echo $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)
8.3.60.0120.00616.50
8.3.50.0100.00316.50
8.3.40.0090.00618.71
8.3.30.0110.00418.72
8.3.20.0000.00720.20
8.3.10.0090.00021.77
8.3.00.0080.00019.54
8.2.180.0140.00716.75
8.2.170.0110.00422.96
8.2.160.0100.00719.09
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00019.39
8.2.120.0000.00726.35
8.2.110.0060.00322.25
8.2.100.0090.00317.91
8.2.90.0040.00419.18
8.2.80.0090.00017.97
8.2.70.0040.00417.50
8.2.60.0080.00017.80
8.2.50.0040.00418.10
8.2.40.0000.00720.61
8.2.30.0030.00519.11
8.2.20.0000.00718.10
8.2.10.0040.00418.11
8.2.00.0070.00017.98
8.1.280.0040.01125.92
8.1.270.0080.00022.08
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0000.00923.64
8.1.230.0080.00317.76
8.1.220.0000.00817.76
8.1.210.0030.00618.77
8.1.200.0090.00017.35
8.1.190.0040.00417.22
8.1.180.0000.00718.10
8.1.170.0000.01018.59
8.1.160.0070.00019.00
8.1.150.0030.00618.71
8.1.140.0100.00019.40
8.1.130.0030.00518.81
8.1.120.0030.00317.38
8.1.110.0040.00417.26
8.1.100.0060.00317.24
8.1.90.0040.00417.34
8.1.80.0000.00717.43
8.1.70.0030.00317.40
8.1.60.0060.00317.41
8.1.50.0040.00417.46
8.1.40.0070.00317.32
8.1.30.0080.00017.59
8.1.20.0040.00417.50
8.1.10.0000.00717.49
8.1.00.0060.00317.30
8.0.300.0090.00018.77
8.0.290.0040.00416.63
8.0.280.0050.00318.30
8.0.270.0000.00817.21
8.0.260.0070.00016.86
8.0.250.0070.00016.93
8.0.240.0070.00017.02
8.0.230.0030.00316.89
8.0.220.0030.00316.88
8.0.210.0030.00316.95
8.0.200.0030.00316.97
8.0.190.0030.00516.90
8.0.180.0000.00716.79
8.0.170.0000.00716.98
8.0.160.0030.00616.96
8.0.150.0000.00816.88
8.0.140.0000.00716.95
8.0.130.0050.00013.30
8.0.120.0050.00216.84
8.0.110.0050.00316.76
8.0.100.0040.00416.80
8.0.90.0050.00316.82
8.0.80.0060.01316.88
8.0.70.0050.00216.98
8.0.60.0000.00716.80
8.0.50.0040.00416.82
8.0.30.0070.01017.02
8.0.20.0110.01017.40
8.0.10.0030.00616.96
8.0.00.0130.00316.86
7.4.330.0030.00315.55
7.4.320.0060.00016.43
7.4.300.0000.00616.52
7.4.290.0000.00716.33
7.4.280.0030.00616.40
7.4.270.0040.00416.35
7.4.260.0040.00416.38
7.4.250.0000.00716.39
7.4.240.0050.00316.48
7.4.230.0000.00916.53
7.4.220.0070.01116.48
7.4.210.0080.00616.48
7.4.200.0000.00716.24
7.4.160.0110.00816.38
7.4.150.0140.00517.40
7.4.140.0090.01317.86
7.4.130.0060.01216.64
7.4.120.0080.01516.50
7.4.110.0070.01716.48
7.4.100.0150.02116.37
7.4.90.0100.00716.43
7.4.80.0180.00019.39
7.4.70.0030.01516.43
7.4.60.0070.01016.49
7.4.50.0030.01316.23
7.4.40.0090.00916.32
7.4.30.0070.01116.57
7.4.00.0140.00015.11
7.3.330.0000.00513.18
7.3.320.0000.00613.08
7.3.310.0000.00716.09
7.3.300.0070.00016.11
7.3.290.0050.01116.22
7.3.280.0080.00916.25
7.3.270.0120.00617.40
7.3.260.0050.01116.26
7.3.250.0080.00916.32
7.3.240.0090.00916.36
7.3.230.0090.01516.62
7.3.210.0130.00316.14
7.3.200.0070.01016.19
7.3.190.0170.00316.16
7.3.180.0100.00716.43
7.3.170.0070.01016.25
7.3.160.0130.00316.34
7.3.10.0160.00016.34
7.3.00.0060.00616.61
7.2.330.0100.01016.39
7.2.320.0100.00716.66
7.2.310.0060.01116.65
7.2.300.0030.01416.23
7.2.290.0160.00916.68
7.2.130.0030.00716.87
7.2.120.0050.00516.95
7.2.110.0000.01216.96
7.2.100.0080.00417.01
7.2.90.0030.00717.04
7.2.80.0050.00516.89
7.2.70.0030.00816.91
7.2.60.0090.00816.57
7.2.50.0090.00616.57
7.2.40.0030.00716.72
7.2.30.0060.00916.64
7.2.20.0060.00916.96
7.2.10.0030.00916.73
7.2.00.0120.00318.02
7.1.250.0000.00915.91
7.1.200.0110.00615.46
7.1.100.0030.00717.97
7.1.70.0070.01217.03
7.1.60.0250.01135.15
7.1.50.0190.01734.75
7.1.40.0250.01134.48
7.1.30.0190.01734.59
7.1.20.0200.01334.50
7.1.10.0010.01616.38
7.1.00.0060.01416.48
7.0.200.0080.00816.86
7.0.190.0080.00816.35
7.0.180.0020.01416.07
7.0.170.0070.01016.08
7.0.160.0030.01316.13
7.0.150.0070.00716.21
7.0.140.0080.01116.24
7.0.130.0060.01216.46
7.0.120.0090.00816.52
7.0.110.0070.01316.55
7.0.100.0090.00916.29
7.0.90.0080.00716.15
7.0.80.0110.00816.22
7.0.70.0070.01116.13
7.0.60.0090.00716.19
7.0.50.0060.01016.18
7.0.40.0050.01216.45
7.0.30.0000.01316.16
7.0.20.0090.00816.23
7.0.10.0060.01016.38
7.0.00.0060.01016.20

preferences:
40.67 ms | 400 KiB | 5 Q