3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo substr('abcdef', 1); // bcdef //echo substr('abcdef', 1, 3); // bcd //echo substr('abcdef', 0, 4); // abcd //echo substr('abcdef', 0, 8); // abcdef //echo substr('abcdef', -1, 1); // f

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)
8.3.60.0100.00718.30
8.3.50.0070.01221.92
8.3.40.0180.00318.48
8.3.30.0120.00318.64
8.3.20.0080.00018.65
8.3.10.0000.00820.91
8.3.00.0070.00023.59
8.2.180.0070.00716.50
8.2.170.0040.01122.96
8.2.160.0100.00320.44
8.2.150.0050.00324.18
8.2.140.0090.00024.66
8.2.130.0080.00026.16
8.2.120.0080.00021.09
8.2.110.0030.00720.39
8.2.100.0060.00617.64
8.2.90.0090.00018.22
8.2.80.0040.00419.28
8.2.70.0030.00717.38
8.2.60.0070.00017.91
8.2.50.0060.00318.07
8.2.40.0030.00718.03
8.2.30.0000.00819.38
8.2.20.0030.00517.50
8.2.10.0040.00417.55
8.2.00.0020.00517.47
8.1.280.0120.00625.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0090.00022.14
8.1.230.0120.00022.82
8.1.220.0040.00417.74
8.1.210.0040.00418.89
8.1.200.0040.00417.22
8.1.190.0000.00917.26
8.1.180.0000.00818.10
8.1.170.0040.00418.43
8.1.160.0040.00418.75
8.1.150.0040.00418.50
8.1.140.0030.00617.35
8.1.130.0000.00617.75
8.1.120.0030.00417.32
8.1.110.0090.00017.32
8.1.100.0040.00417.20
8.1.90.0040.00417.35
8.1.80.0070.00017.18
8.1.70.0070.00017.18
8.1.60.0060.00317.45
8.1.50.0070.00017.16
8.1.40.0000.00817.30
8.1.30.0070.00017.46
8.1.20.0040.00417.48
8.1.10.0040.00417.28
8.1.00.0040.00417.37
8.0.300.0030.00620.16
8.0.290.0040.00417.04
8.0.280.0030.00318.37
8.0.270.0030.00317.16
8.0.260.0070.00016.69
8.0.250.0030.00516.86
8.0.240.0000.00816.89
8.0.230.0070.00016.85
8.0.220.0000.00716.62
8.0.210.0070.00016.71
8.0.200.0030.00316.81
8.0.190.0040.00416.83
8.0.180.0000.00816.73
8.0.170.0040.00416.69
8.0.160.0030.00316.60
8.0.150.0030.00516.58
8.0.140.0040.00416.62
8.0.130.0030.00313.14
8.0.120.0080.00016.66
8.0.110.0020.00516.56
8.0.100.0000.00716.73
8.0.90.0000.00716.73
8.0.80.0000.01516.66
8.0.70.0080.00016.53
8.0.60.0040.00416.57
8.0.50.0040.00416.77
8.0.30.0060.01316.88
8.0.20.0110.00817.40
8.0.10.0030.00316.78
8.0.00.0090.01216.66
7.4.330.0060.00014.85
7.4.320.0000.00716.50
7.4.300.0030.00316.50
7.4.290.0000.00716.43
7.4.280.0080.00016.25
7.4.270.0070.00016.28
7.4.260.0030.00313.07
7.4.250.0000.00816.29
7.4.240.0000.00716.36
7.4.230.0030.00316.52
7.4.220.0060.01916.30
7.4.210.0050.01016.43
7.4.200.0070.00016.25
7.4.190.0030.00316.16
7.4.160.0130.00616.30
7.4.150.0090.00917.40
7.4.140.0090.00817.86
7.4.130.0100.01016.30
7.4.120.0090.00616.29
7.4.110.0070.01116.38
7.4.100.0100.01016.40
7.4.90.0100.01016.29
7.4.80.0060.01219.39
7.4.70.0110.01116.39
7.4.60.0090.00916.41
7.4.50.0040.00416.48
7.4.40.0150.00322.77
7.4.30.0100.00716.41
7.4.00.0040.01314.93
7.3.330.0000.00512.86
7.3.320.0030.00312.98
7.3.310.0070.00016.18
7.3.300.0060.00015.98
7.3.290.0030.01016.12
7.3.280.0080.00916.15
7.3.270.0150.00317.40
7.3.260.0130.00518.24
7.3.250.0080.00816.29
7.3.240.0140.00616.44
7.3.230.0030.01316.47
7.3.210.0120.00616.51
7.3.200.0090.01219.39
7.3.190.0070.01016.17
7.3.180.0110.01016.11
7.3.170.0120.00916.27
7.3.160.0060.01016.48
7.3.120.0030.01314.57
7.3.110.0000.01814.93
7.3.100.0040.00814.39
7.3.90.0060.00314.85
7.3.80.0040.01114.78
7.3.70.0090.00614.73
7.3.60.0100.00314.62
7.3.50.0080.00414.36
7.3.40.0090.00414.61
7.3.30.0040.00814.71
7.3.20.0090.00616.44
7.3.10.0040.00716.47
7.3.00.0040.01216.59
7.2.330.0110.00616.55
7.2.320.0120.00816.50
7.2.310.0120.01016.18
7.2.300.0130.00316.53
7.2.290.0080.00916.49
7.2.250.0070.01414.96
7.2.240.0030.01714.85
7.2.230.0060.00914.96
7.2.220.0100.00314.78
7.2.210.0050.00514.79
7.2.200.0060.00614.94
7.2.190.0060.00814.66
7.2.180.0080.00414.71
7.2.170.0040.00815.00
7.2.60.0000.01216.87
7.2.00.0030.01319.25
7.1.330.0030.00815.41
7.1.320.0030.00815.43
7.1.310.0040.00415.75
7.1.300.0030.00815.57
7.1.290.0100.00315.62
7.1.280.0000.01115.74
7.1.270.0100.00315.39
7.1.260.0060.00615.70
7.1.200.0040.00415.65
7.1.100.0040.00417.80
7.1.70.0000.01216.66
7.1.60.0000.01117.09
7.1.50.0030.00716.79
7.1.00.0070.06322.30
7.0.200.0030.00516.44
7.0.140.0000.07722.18
7.0.60.0070.07319.90
7.0.50.0100.04317.80
7.0.40.0070.05320.36
7.0.30.0200.04320.12
7.0.20.0130.04320.00
7.0.10.0130.08020.33
7.0.00.0070.05720.04
5.6.280.0030.07321.16
5.6.210.0170.07020.61
5.6.200.0130.08318.18
5.6.190.0070.08320.39
5.6.180.0270.07720.63
5.6.170.0230.05020.41
5.6.160.0070.08720.51
5.6.150.0030.05318.16
5.6.140.0130.07318.15
5.6.130.0000.04318.18
5.6.120.0070.06021.14
5.6.110.0030.09320.94
5.6.100.0130.05721.00
5.6.90.0270.05320.94
5.6.80.0070.03720.50
5.5.350.0330.06020.40
5.5.340.0030.08718.02
5.5.330.0130.05020.40
5.5.320.0200.05720.22
5.5.310.0270.06020.27
5.5.300.0030.08717.89
5.5.290.0070.07017.94
5.5.280.0070.06020.76
5.5.270.0030.06020.88
5.5.260.0070.09020.96
5.5.250.0100.07020.69
5.5.240.0130.07020.34
5.4.450.0230.07319.41
5.4.440.0300.04019.15
5.4.430.0230.04019.13
5.4.420.0400.03719.18
5.4.410.0230.08019.06
5.4.400.0270.04318.87
5.4.390.0270.06718.86
5.4.380.0270.04019.09
5.4.370.0330.07319.11
5.4.360.0370.03718.96
5.4.350.0400.06318.99
5.4.340.0330.06019.08
5.4.320.0300.05018.83
5.4.310.0230.04318.79
5.4.300.0400.06018.98
5.4.290.0270.04718.88
5.4.280.0300.07319.08
5.4.270.0270.04019.08
5.4.260.0230.04019.05
5.4.250.0300.04718.92
5.4.240.0070.08019.11
5.4.230.2230.03719.09
5.4.220.3530.04719.06
5.4.210.3770.02718.77
5.4.200.3700.03719.04
5.4.190.3630.02719.07
5.4.180.3570.04319.07
5.4.170.4000.03318.85
5.4.160.3530.03719.06
5.4.150.3500.03718.99
5.4.140.3670.04316.29
5.4.130.3630.04016.22
5.4.120.3500.04016.15
5.4.110.3470.04016.48
5.4.100.3770.03716.05
5.4.90.3630.04016.20
5.4.80.3230.04316.30
5.4.70.3270.03316.37
5.4.60.3500.04016.47
5.4.50.3770.03016.39
5.4.40.3670.03316.31
5.4.30.4100.04016.36
5.4.20.4270.03316.45
5.4.10.4270.03316.39
5.4.00.3870.03315.89
5.3.290.0330.04714.49
5.3.280.3570.03314.52
5.3.270.3930.03714.45
5.3.260.3470.04314.69
5.3.250.3530.03714.55
5.3.240.3470.04014.53
5.3.230.3600.04314.52
5.3.220.3630.03314.61
5.3.210.3230.04014.41
5.3.200.3230.04014.43
5.3.190.3470.06314.42
5.3.180.3770.04014.41
5.3.170.3230.03314.39
5.3.160.3570.03314.54
5.3.150.3430.03314.43
5.3.140.3400.04014.40
5.3.130.4330.03714.57
5.3.120.4070.04314.39
5.3.110.3830.03714.45
5.3.100.4270.03313.88
5.3.90.4270.03713.89
5.3.80.4130.04013.99
5.3.70.4170.03013.80
5.3.60.4130.04014.10
5.3.50.4200.03313.80
5.3.40.3570.03713.88
5.3.30.3700.04013.85
5.3.20.3830.04013.48
5.3.10.3670.03013.55
5.3.00.3700.03013.56
5.2.170.3570.03011.08
5.2.160.3670.03310.97
5.2.150.3030.03011.16
5.2.140.3000.02310.98
5.2.130.3030.03010.95
5.2.120.2970.02710.96
5.2.110.3070.02310.93
5.2.100.3700.03311.15
5.2.90.3400.03010.98
5.2.80.3170.03010.93
5.2.70.2670.03011.03
5.2.60.2800.02710.90
5.2.50.2430.02710.88
5.2.40.2270.03311.14
5.2.30.2870.03010.89
5.2.20.2700.02310.87
5.2.10.2630.03010.79
5.2.00.3030.02310.80
5.1.60.2670.0239.88
5.1.50.2400.0239.86
5.1.40.2200.0239.91
5.1.30.2500.02310.42
5.1.20.2430.02710.34
5.1.10.2530.0239.93
5.1.00.3170.01710.11
5.0.50.0600.0208.51
5.0.40.0930.0208.48
5.0.30.0970.0308.19
5.0.20.1130.0208.34
5.0.10.0870.0178.05
5.0.00.1330.0308.08
4.4.90.1330.0177.48
4.4.80.1270.0137.48
4.4.70.1400.0137.48
4.4.60.1700.0137.48
4.4.50.1600.0177.48
4.4.40.1030.0237.48
4.4.30.1370.0177.48
4.4.20.1100.0177.48
4.4.10.1200.0137.48
4.4.00.0930.0177.48
4.3.110.1130.0207.48
4.3.100.1000.0177.48
4.3.90.0930.0207.48
4.3.80.0930.0237.48
4.3.70.0830.0137.48
4.3.60.0900.0137.48
4.3.50.1100.0137.48
4.3.40.1130.0207.48
4.3.30.0300.0137.48
4.3.20.0300.0137.48
4.3.10.0630.0137.48
4.3.00.0370.0207.48

preferences:
39.95 ms | 401 KiB | 5 Q