3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "<derp>"; $words = array(); $words[] = &$string; $string = substr($string, 1); $string = substr($string, -1); var_dump($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)
8.3.60.0090.01218.30
8.3.50.0120.00721.21
8.3.40.0180.00318.65
8.3.30.0100.00320.34
8.3.20.0040.00420.27
8.3.10.0040.00422.00
8.3.00.0040.00422.14
8.2.180.0100.01316.63
8.2.170.0140.00322.96
8.2.160.0120.00822.20
8.2.150.0080.00024.18
8.2.140.0090.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00720.75
8.2.110.0030.00622.26
8.2.100.0090.00617.91
8.2.90.0000.00719.24
8.2.80.0000.00719.25
8.2.70.0080.00017.63
8.2.60.0000.01118.03
8.2.50.0060.00318.07
8.2.40.0000.00918.34
8.2.30.0030.00319.30
8.2.20.0040.00417.54
8.2.10.0040.00417.61
8.2.00.0040.00417.71
8.1.280.0080.00825.92
8.1.270.0080.00023.99
8.1.260.0040.00426.35
8.1.250.0060.00328.09
8.1.240.0060.00323.70
8.1.230.0080.00319.16
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0060.00317.23
8.1.190.0050.00317.41
8.1.180.0000.00818.85
8.1.170.0000.00818.58
8.1.160.0040.00418.73
8.1.150.0000.00718.48
8.1.140.0050.00317.29
8.1.130.0050.00317.70
8.1.120.0000.00717.41
8.1.110.0040.00417.34
8.1.100.0070.00017.33
8.1.90.0060.00317.27
8.1.80.0040.00417.37
8.1.70.0030.00317.35
8.1.60.0030.00617.40
8.1.50.0030.00517.52
8.1.40.0030.00617.35
8.1.30.0030.00617.57
8.1.20.0040.00417.64
8.1.10.0000.00717.36
8.1.00.0030.00717.39
8.0.300.0030.00318.77
8.0.290.0070.00017.18
8.0.280.0000.00718.43
8.0.270.0070.00017.20
8.0.260.0030.00316.77
8.0.250.0070.00016.84
8.0.240.0000.00816.92
8.0.230.0030.00316.76
8.0.220.0030.00316.85
8.0.210.0000.00716.79
8.0.200.0000.00716.85
8.0.190.0030.00316.82
8.0.180.0000.00716.87
8.0.170.0000.00716.75
8.0.160.0000.00716.89
8.0.150.0060.00316.74
8.0.140.0040.00416.68
8.0.130.0060.00013.29
8.0.120.0040.00416.72
8.0.110.0040.00416.74
8.0.100.0030.00516.89
8.0.90.0000.00716.65
8.0.80.0080.00816.84
8.0.70.0040.00416.63
8.0.60.0050.00316.71
8.0.50.0030.00516.77
8.0.30.0110.00717.02
8.0.20.0100.01217.40
8.0.10.0000.00716.80
8.0.00.0120.01016.70
7.4.330.0050.00015.00
7.4.320.0030.00316.35
7.4.300.0070.00016.54
7.4.290.0070.00016.46
7.4.280.0040.00416.54
7.4.270.0000.00716.55
7.4.260.0050.00013.25
7.4.250.0070.00016.43
7.4.240.0040.00316.40
7.4.230.0070.00016.63
7.4.220.0150.00316.40
7.4.210.0080.01116.52
7.4.200.0040.00416.52
7.4.190.0070.00016.50
7.4.160.0090.00616.55
7.4.150.0090.00917.40
7.4.140.0070.01317.86
7.4.130.0090.00816.55
7.4.120.0090.00916.49
7.4.110.0130.00716.50
7.4.100.0100.00716.49
7.4.90.0070.01416.54
7.4.80.0130.00319.39
7.4.70.0070.00916.59
7.4.60.0030.01416.47
7.4.50.0040.00416.34
7.4.40.0060.00622.77
7.4.30.0060.01716.58
7.4.00.0100.00714.89
7.3.330.0050.00013.19
7.3.320.0000.00512.93
7.3.310.0000.00616.21
7.3.300.0030.00316.23
7.3.290.0060.01016.24
7.3.280.0070.01016.23
7.3.270.0130.01017.40
7.3.260.0080.01516.29
7.3.250.0070.01216.41
7.3.240.0140.00316.38
7.3.230.0000.02016.39
7.3.210.0150.00416.16
7.3.200.0040.01319.39
7.3.190.0050.01116.52
7.3.180.0130.00316.29
7.3.170.0100.00616.61
7.3.160.0090.00616.34
7.3.120.0100.00714.75
7.2.330.0090.01516.65
7.2.320.0130.00516.57
7.2.310.0070.01116.59
7.2.300.0080.00816.43
7.2.290.0130.00316.66
7.2.60.0040.01116.77
7.2.00.0030.01019.12
7.1.200.0050.00315.70
7.1.100.0000.01018.00
7.1.70.0040.00417.13
7.1.60.0140.01019.32
7.1.50.0060.01316.91
7.1.00.0070.04722.40
7.0.200.0050.00216.57
7.0.140.0030.07321.98
7.0.100.0030.04319.93
7.0.90.0130.07319.94
7.0.80.0100.07319.99
7.0.70.0100.07719.85
7.0.60.0030.08719.97
7.0.50.0130.08020.32
7.0.40.0170.07320.05
7.0.30.0130.08020.14
7.0.20.0100.08319.96
7.0.10.0030.08720.13
7.0.00.0070.05720.05
5.6.280.0030.07321.14
5.6.250.0070.05320.63
5.6.240.0070.08320.63
5.6.230.0070.08020.62
5.6.220.0170.07020.48
5.6.210.0070.07020.68
5.6.200.0130.07321.17
5.6.190.0130.07321.11
5.6.180.0130.07721.00
5.6.170.0130.05321.13
5.6.160.0100.08321.13
5.6.150.0100.08020.96
5.6.140.0170.05021.04
5.6.130.0070.08021.02
5.6.120.0100.07321.04
5.6.110.0070.05321.01
5.6.100.0170.06721.10
5.6.90.0070.07720.92
5.6.80.0100.06020.46
5.6.70.0070.06320.38
5.6.60.0100.07320.50
5.6.50.0030.07720.44
5.6.40.0130.07020.36
5.6.30.0030.08320.42
5.6.20.0070.04320.43
5.6.10.0070.08020.42
5.6.00.0130.03720.50
5.5.380.0100.08020.35
5.5.370.0200.06720.42
5.5.360.0170.07720.50
5.5.350.0200.07320.46
5.5.340.0030.05020.83
5.5.330.0070.07320.89
5.5.320.0100.08020.76
5.5.310.0130.07720.75
5.5.300.0100.08020.88
5.5.290.0070.05320.80
5.5.280.0070.08320.77
5.5.270.0130.07720.85
5.5.260.0100.04320.87
5.5.250.0070.05020.64
5.5.240.0100.07320.21
5.5.230.0100.08020.22
5.5.220.0070.07320.10
5.5.210.0030.08720.26
5.5.200.0000.08320.12
5.5.190.0070.07020.26
5.5.180.0130.07020.23
5.5.160.0130.07320.12
5.5.150.0000.08320.27
5.5.140.0070.08320.07
5.5.130.0100.07720.09
5.5.120.0030.07720.27
5.5.110.0200.04020.27
5.5.100.0100.07019.98
5.5.90.0200.06320.06
5.5.80.0070.08019.97
5.5.70.0030.08320.09
5.5.60.0030.07020.09
5.5.50.0170.06720.08
5.5.40.0000.05320.09
5.5.30.0100.07720.14
5.5.20.0030.04719.91
5.5.10.0070.03720.12
5.5.00.0000.04720.07
5.4.450.0070.08019.38
5.4.440.0070.07319.37
5.4.430.0170.06719.44
5.4.420.0130.06719.55
5.4.410.0100.07019.25
5.4.400.0070.07319.14
5.4.390.0070.07319.04
5.4.380.0070.07718.90
5.4.370.0030.05319.14
5.4.360.0100.08018.82
5.4.350.0000.05319.05
5.4.340.0070.05019.12
5.4.320.0100.07318.90
5.4.310.0070.07719.04
5.4.300.0070.07319.04
5.4.290.0100.07319.03
5.4.280.0030.08019.11
5.4.270.0200.06318.78
5.4.260.0030.07719.03
5.4.250.0030.07718.96
5.4.240.0170.07019.07
5.4.230.0070.07019.03
5.4.220.0070.04719.11
5.4.210.0130.07019.13
5.4.200.0170.06718.96
5.4.190.0070.05719.03
5.4.180.0070.05318.89
5.4.170.0070.07018.80
5.4.160.0070.03718.98
5.4.150.0100.03718.77
5.4.140.0070.04716.29
5.4.130.0070.05716.27
5.4.120.0100.03016.12
5.4.110.0070.03316.29
5.4.100.0030.04016.45
5.4.90.0030.04716.43
5.4.80.0030.03316.27
5.4.70.0000.04016.22
5.4.60.0100.04716.39
5.4.50.0030.05016.39
5.4.40.0000.05016.29
5.4.30.0030.07716.21
5.4.20.0000.04016.36
5.4.10.0000.04016.39
5.4.00.0170.05315.81
5.3.290.0070.07714.52
5.3.280.0070.07314.59
5.3.270.0070.06714.43
5.3.260.0100.03314.46
5.3.250.0070.05014.59
5.3.240.0000.04714.42
5.3.230.0070.04014.45
5.3.220.0030.04714.54
5.3.210.0070.04014.54
5.3.200.0130.03314.53
5.3.190.0000.04014.52
5.3.180.0070.03314.40
5.3.170.0000.05014.54
5.3.160.0070.03314.51
5.3.150.0070.03314.43
5.3.140.0070.05714.50
5.3.130.0070.04314.54
5.3.120.0070.04714.54
5.3.110.0030.04314.52
5.3.100.0070.07313.90
5.3.90.0070.06314.02
5.3.80.0000.04313.98
5.3.70.0030.03713.77
5.3.60.0030.04313.86
5.3.50.0000.03713.91
5.3.40.0070.04713.93
5.3.30.0000.03713.89
5.3.20.0000.03713.63
5.3.10.0070.03013.41
5.3.00.0000.03713.63
5.2.170.0000.05311.48
5.2.160.0030.06011.48
5.2.150.0000.03011.48
5.2.140.0030.03011.48
5.2.130.0070.02711.48
5.2.120.0070.02311.48
5.2.110.0030.02711.48
5.2.100.0000.03311.48
5.2.90.0030.02711.48
5.2.80.0030.03711.48
5.2.70.0000.03011.48
5.2.60.0000.03011.48
5.2.50.0000.03011.48
5.2.40.0000.02711.48
5.2.30.0070.02711.48
5.2.20.0030.04311.48
5.2.10.0000.02711.48
5.2.00.0030.02711.48
5.1.60.0070.02311.48
5.1.50.0030.02011.48
5.1.40.0000.02311.48
5.1.30.0070.02711.48
5.1.20.0000.04011.48
5.1.10.0030.04011.48
5.1.00.0030.02311.48
5.0.50.0000.02011.48
5.0.40.0030.02011.48
5.0.30.0000.02711.48
5.0.20.0030.02711.48
5.0.10.0000.02011.48
5.0.00.0000.03311.48
4.4.90.0000.01711.48
4.4.80.0000.01711.48
4.4.70.0000.01711.48
4.4.60.0030.01711.48
4.4.50.0000.01711.48
4.4.40.0000.03311.48
4.4.30.0000.01711.48
4.4.20.0030.01311.48
4.4.10.0070.01311.48
4.4.00.0030.02311.48
4.3.110.0030.03011.48
4.3.100.0030.02011.48
4.3.90.0030.01711.48
4.3.80.0000.02711.48
4.3.70.0070.02011.48
4.3.60.0000.01711.48
4.3.50.0030.02711.48
4.3.40.0000.05011.48
4.3.30.0070.03011.48
4.3.20.0000.04011.48
4.3.10.0030.03311.48
4.3.00.0030.03011.48

preferences:
67.05 ms | 401 KiB | 5 Q