3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'abcdef'; $x = substr($a, 0, strlen($a)-1);echo $x;echo "\n"; $y = substr($x, 0, strlen($x)-1);echo strlen('a');

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)
8.3.40.0090.00618.68
8.3.30.0070.00720.25
8.3.20.0040.00418.73
8.3.10.0040.00420.95
8.3.00.0040.00422.43
8.2.170.0070.00722.96
8.2.160.0160.00020.38
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0030.00526.16
8.2.120.0000.00721.13
8.2.110.0040.00419.27
8.2.100.0070.00417.78
8.2.90.0000.00917.88
8.2.80.0000.00818.64
8.2.70.0030.00617.38
8.2.60.0090.00017.48
8.2.50.0030.00517.80
8.2.40.0040.00419.38
8.2.30.0040.00419.38
8.2.20.0000.00717.71
8.2.10.0040.00417.70
8.2.00.0000.00817.71
8.1.270.0040.00423.99
8.1.260.0080.00026.35
8.1.250.0000.00728.09
8.1.240.0100.00019.13
8.1.230.0070.00322.66
8.1.220.0030.00717.74
8.1.210.0030.00618.77
8.1.200.0000.00817.23
8.1.190.0080.00017.10
8.1.180.0040.00418.10
8.1.170.0080.00017.62
8.1.160.0080.00018.70
8.1.150.0050.00318.47
8.1.140.0050.00217.38
8.1.130.0070.00017.86
8.1.120.0070.00317.36
8.1.110.0050.00217.29
8.1.100.0040.00417.39
8.1.90.0050.00217.45
8.1.80.0000.00717.39
8.1.70.0070.00017.31
8.1.60.0080.00017.52
8.1.50.0000.00717.43
8.1.40.0030.00617.43
8.1.30.0030.00517.48
8.1.20.0040.00417.60
8.1.10.0050.00517.42
8.1.00.0040.00417.52
8.0.300.0040.00418.77
8.0.290.0040.00416.75
8.0.280.0070.00018.30
8.0.270.0030.00317.29
8.0.260.0060.00018.44
8.0.250.0070.00016.88
8.0.240.0050.00216.99
8.0.230.0040.00416.90
8.0.220.0040.00416.83
8.0.210.0000.00716.77
8.0.200.0040.00416.86
8.0.190.0040.00416.77
8.0.180.0040.00416.86
8.0.170.0070.00016.73
8.0.160.0000.00716.73
8.0.150.0000.00716.67
8.0.140.0000.01116.69
8.0.130.0050.00013.21
8.0.120.0050.00316.80
8.0.110.0040.00416.86
8.0.100.0040.00416.73
8.0.90.0000.00716.81
8.0.80.0030.01216.78
8.0.70.0000.00816.67
8.0.60.0070.00016.82
8.0.50.0040.00416.72
8.0.30.0050.01317.11
8.0.20.0090.01117.40
8.0.10.0030.00416.85
8.0.00.0120.00716.62
7.4.330.0020.00216.89
7.4.320.0030.00316.57
7.4.300.0000.00616.52
7.4.290.0030.00316.34
7.4.280.0070.00016.52
7.4.270.0000.00716.52
7.4.260.0040.00413.20
7.4.250.0000.00716.41
7.4.240.0080.00016.46
7.4.230.0070.00016.42
7.4.220.0160.01016.42
7.4.210.0110.00416.47
7.4.200.0030.00516.54
7.4.190.0030.00316.54
7.4.160.0070.01016.50
7.4.150.0180.00017.40
7.4.140.0100.00717.86
7.4.130.0120.00516.47
7.4.120.0140.00516.45
7.4.110.0060.01216.21
7.4.100.0100.00716.44
7.4.90.0070.01116.58
7.4.80.0060.01219.39
7.4.70.0130.00316.40
7.4.60.0070.01016.49
7.4.50.0090.00016.48
7.4.40.0080.00422.77
7.4.30.0110.01116.42
7.4.00.0060.00614.84
7.3.330.0050.00013.30
7.3.320.0050.00013.19
7.3.310.0030.00316.28
7.3.300.0000.00716.16
7.3.290.0080.00616.34
7.3.280.0110.00516.34
7.3.270.0120.00617.40
7.3.260.0080.01018.24
7.3.250.0120.00816.52
7.3.240.0030.01316.37
7.3.230.0080.00816.41
7.3.210.0070.01016.41
7.3.200.0070.01019.39
7.3.190.0100.00716.63
7.3.180.0060.01516.58
7.3.170.0060.00916.51
7.3.160.0080.00816.35
7.3.120.0030.01014.74
7.2.330.0100.00716.57
7.2.320.0030.01316.64
7.2.310.0030.01316.35
7.2.300.0100.01416.34
7.2.290.0000.01616.62
7.2.60.0110.00416.97
7.2.00.0000.01319.14
7.1.200.0060.00615.51
7.1.100.0100.00718.14
7.1.70.0000.01317.18
7.1.60.0070.01419.17
7.1.50.0060.01617.01
7.1.00.0000.03722.27
7.0.200.0030.00616.71
7.0.140.0000.07721.95
7.0.100.0100.07720.17
7.0.90.0070.06719.94
7.0.80.0170.07019.85
7.0.70.0270.07020.00
7.0.60.0030.07019.95
7.0.50.0100.04720.31
7.0.40.0030.06320.08
7.0.30.0070.08020.07
7.0.20.0070.08320.10
7.0.10.0070.05020.14
7.0.00.0100.07020.02
5.6.280.0000.07720.85
5.6.250.0070.08320.66
5.6.240.0100.08320.50
5.6.230.0070.07320.62
5.6.220.0070.05020.64
5.6.210.0130.07720.74
5.6.200.0170.07021.02
5.6.190.0030.08021.16
5.6.180.0130.06321.10
5.6.170.0030.07721.04
5.6.160.0070.05021.08
5.6.150.0100.07320.99
5.6.140.0070.08021.13
5.6.130.0100.06321.03
5.6.120.0130.04721.07
5.6.110.0130.08020.93
5.6.100.0100.06321.06
5.6.90.0030.05021.14
5.6.80.0070.07720.44
5.6.70.0070.06720.50
5.6.60.0170.05320.42
5.6.50.0030.04720.33
5.6.40.0070.07320.38
5.6.30.0070.06320.37
5.6.20.0070.04720.30
5.6.10.0030.08320.40
5.6.00.0100.06020.43
5.5.380.0070.07720.39
5.5.370.0130.07020.55
5.5.360.0030.08720.39
5.5.350.0170.07020.41
5.5.340.0130.07020.75
5.5.330.0000.08720.86
5.5.320.0100.03720.87
5.5.310.0070.05020.90
5.5.300.0030.09020.75
5.5.290.0100.07320.72
5.5.280.0130.07320.75
5.5.270.0030.07720.78
5.5.260.0030.06320.90
5.5.250.0130.07020.59
5.5.240.0170.06320.11
5.5.230.0100.07720.20
5.5.220.0100.04720.28
5.5.210.0070.07720.20
5.5.200.0030.06020.23
5.5.190.0030.08720.09
5.5.180.0130.06320.14
5.5.160.0070.05719.98
5.5.150.0000.05720.26
5.5.140.0000.04320.07
5.5.130.0070.07720.25
5.5.120.0070.08020.22
5.5.110.0000.08720.26
5.5.100.0100.07019.95
5.5.90.0100.07720.05
5.5.80.0100.08720.09
5.5.70.0070.08320.15
5.5.60.0130.07720.04
5.5.50.0170.07319.98
5.5.40.0030.08020.14
5.5.30.0070.08020.14
5.5.20.0030.04320.14
5.5.10.0100.07720.03
5.5.00.0030.08320.02
5.4.450.0030.08319.36
5.4.440.0130.08019.13
5.4.430.0000.04319.29
5.4.420.0100.06319.35
5.4.410.0100.04319.25
5.4.400.0070.08018.95
5.4.390.0100.03719.07
5.4.380.0030.07019.02
5.4.370.0070.04318.96
5.4.360.0100.07019.11
5.4.350.0030.07719.14
5.4.340.0030.06719.07
5.4.320.0100.04318.98
5.4.310.0030.06319.02
5.4.300.0030.07718.94
5.4.290.0000.04018.99
5.4.280.0070.06018.98
5.4.270.0200.05718.78
5.4.260.0100.07719.14
5.4.250.0100.04319.18
5.4.240.0100.07319.05
5.4.230.0130.05719.02
5.4.220.0030.07719.13
5.4.210.0130.04018.89
5.4.200.0130.07719.06
5.4.190.0030.06019.02
5.4.180.0070.07319.01
5.4.170.0130.07018.95
5.4.160.0100.03718.94
5.4.150.0030.08019.04
5.4.140.0070.07716.28
5.4.130.0070.07016.36
5.4.120.0100.06316.31
5.4.110.0070.04316.42
5.4.100.0070.03716.22
5.4.90.0070.07016.30
5.4.80.0070.06716.34
5.4.70.0070.07716.16
5.4.60.0070.06716.41
5.4.50.0030.05016.19
5.4.40.0100.06316.24
5.4.30.0070.06016.19
5.4.20.0070.06716.18
5.4.10.0130.06716.40
5.4.00.0030.07015.75
5.3.290.0170.07014.60
5.3.280.0070.07314.43
5.3.270.0070.06714.58
5.3.260.0030.05014.55
5.3.250.0130.06014.58
5.3.240.0030.04714.59
5.3.230.0030.07014.58
5.3.220.0070.07014.50
5.3.210.0030.07714.57
5.3.200.0000.08314.55
5.3.190.0030.06314.51
5.3.180.0030.03714.57
5.3.170.0070.07714.42
5.3.160.0070.07314.41
5.3.150.0130.07014.56
5.3.140.0100.07014.41
5.3.130.0030.08014.50
5.3.120.0030.07014.40
5.3.110.0100.07314.55
5.3.100.0030.07713.95
5.3.90.0030.07714.00
5.3.80.0000.06713.87
5.3.70.0070.07313.96
5.3.60.0100.03713.99
5.3.50.0100.06713.71
5.3.40.0100.06313.85
5.3.30.0030.07713.89
5.3.20.0070.07013.64
5.3.10.0070.06013.41
5.3.00.0000.05013.64
5.2.170.0070.05011.57
5.2.160.0000.03311.57
5.2.150.0030.06011.57
5.2.140.0170.05311.57
5.2.130.0030.06711.57
5.2.120.0000.06711.57
5.2.110.0100.04711.57
5.2.100.0000.06711.57
5.2.90.0070.05011.57
5.2.80.0070.03311.57
5.2.70.0070.05711.57
5.2.60.0030.04311.57
5.2.50.0070.05711.57
5.2.40.0070.05311.57
5.2.30.0130.03311.57
5.2.20.0130.05711.57
5.2.10.0100.05711.57
5.2.00.0100.02711.57
5.1.60.0030.04011.57
5.1.50.0030.04011.57
5.1.40.0030.04011.57
5.1.30.0030.05311.57
5.1.20.0030.05711.57
5.1.10.0000.04311.57
5.1.00.0070.04711.57
5.0.50.0070.04711.57
5.0.40.0130.03311.57
5.0.30.0000.04711.57
5.0.20.0000.02011.57
5.0.10.0000.04011.57
5.0.00.0030.04011.57
4.4.90.0030.02311.57
4.4.80.0030.03711.57
4.4.70.0000.03711.57
4.4.60.0030.02311.57
4.4.50.0030.03311.57
4.4.40.0000.05311.57
4.4.30.0070.02311.57
4.4.20.0100.02711.57
4.4.10.0000.02011.57
4.4.00.0030.02711.57
4.3.110.0000.03011.57
4.3.100.0030.03311.57
4.3.90.0070.02711.57
4.3.80.0070.03011.57
4.3.70.0030.03011.57
4.3.60.0000.03011.57
4.3.50.0030.02311.57
4.3.40.0030.04711.57
4.3.30.0030.03311.57
4.3.20.0000.03711.57
4.3.10.0070.02711.57
4.3.00.0000.04011.57

preferences:
50.07 ms | 400 KiB | 5 Q