3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'aa'; if(substr($str, 0, 3) == pack("CCC", 0xef, 0xbb)) { $str = substr($str, 3); }

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)
8.3.60.0070.00718.68
8.3.50.0150.00721.98
8.3.40.0100.01018.83
8.3.30.0070.00719.08
8.3.20.0000.00820.18
8.3.10.0080.00020.66
8.3.00.0080.00019.26
8.2.180.0120.00916.63
8.2.170.0080.00622.96
8.2.160.0030.01020.53
8.2.150.0000.00724.18
8.2.140.0060.00324.66
8.2.130.0040.00426.16
8.2.120.0080.00022.23
8.2.110.0060.00322.14
8.2.100.0080.00317.91
8.2.90.0000.00819.23
8.2.80.0040.00417.97
8.2.70.0090.00017.50
8.2.60.0030.00917.90
8.2.50.0080.00018.07
8.2.40.0050.00318.03
8.2.30.0070.00019.49
8.2.20.0040.00417.74
8.2.10.0000.00818.05
8.2.00.0000.00717.75
8.1.280.0070.00725.92
8.1.270.0080.00022.14
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0030.00623.92
8.1.230.0100.00019.16
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0060.00317.23
8.1.190.0000.00817.23
8.1.180.0000.00818.10
8.1.170.0030.00718.56
8.1.160.0070.00021.91
8.1.150.0030.00518.82
8.1.140.0000.00717.37
8.1.130.0040.00417.82
8.1.120.0000.00817.30
8.1.110.0000.00717.41
8.1.100.0000.00717.38
8.1.90.0080.00017.29
8.1.80.0000.00817.22
8.1.70.0000.00717.37
8.1.60.0060.00317.40
8.1.50.0030.00517.42
8.1.40.0080.00017.50
8.1.30.0040.00417.70
8.1.20.0000.00717.67
8.1.10.0040.00417.56
8.1.00.0050.00317.40
8.0.300.0040.00418.77
8.0.290.0070.00016.74
8.0.280.0070.00018.38
8.0.270.0030.00317.17
8.0.260.0000.00717.19
8.0.250.0000.00716.95
8.0.240.0070.00016.94
8.0.230.0070.00017.00
8.0.220.0040.00416.93
8.0.210.0070.00016.90
8.0.200.0000.00716.84
8.0.190.0000.00716.95
8.0.180.0090.00016.93
8.0.170.0040.00416.91
8.0.160.0000.00716.79
8.0.150.0000.00816.85
8.0.140.0030.00316.91
8.0.130.0060.00013.25
8.0.120.0040.00416.81
8.0.110.0000.00716.89
8.0.100.0040.00416.92
8.0.90.0000.00716.78
8.0.80.0100.00716.84
8.0.70.0000.00716.85
8.0.60.0050.00316.92
8.0.50.0000.00716.88
8.0.30.0100.01216.87
8.0.20.0100.00917.40
8.0.10.0040.00416.91
8.0.00.0120.00516.90
7.4.330.0000.00615.14
7.4.320.0030.00316.50
7.4.300.0030.00316.43
7.4.290.0030.00316.52
7.4.280.0040.00416.45
7.4.270.0040.00416.56
7.4.260.0000.00716.59
7.4.250.0020.00516.54
7.4.240.0060.00116.47
7.4.230.0000.00716.62
7.4.220.0070.01316.64
7.4.210.0030.01016.55
7.4.200.0030.00316.68
7.4.160.0090.00616.38
7.4.150.0120.00617.40
7.4.140.0110.00717.86
7.4.130.0070.01016.56
7.4.120.0080.01016.56
7.4.110.0130.00316.50
7.4.100.0110.00516.38
7.4.90.0000.01616.39
7.4.80.0130.00316.59
7.4.70.0060.01216.68
7.4.60.0100.00616.44
7.4.50.0050.00316.71
7.4.40.0080.00816.56
7.4.30.0090.00616.38
7.4.00.0090.00914.83
7.3.330.0000.00612.99
7.3.320.0030.00313.12
7.3.310.0000.00716.16
7.3.300.0080.00016.34
7.3.290.0140.00716.18
7.3.280.0090.00716.29
7.3.270.0100.00717.40
7.3.260.0110.01116.38
7.3.250.0170.00316.28
7.3.240.0170.00016.30
7.3.230.0080.00816.39
7.3.210.0090.00616.31
7.3.200.0100.00719.39
7.3.190.0090.01216.38
7.3.180.0120.00416.27
7.3.170.0120.00316.49
7.3.160.0120.00616.64
7.3.120.0100.01014.77
7.3.110.0040.01514.62
7.3.100.0080.00414.75
7.3.90.0030.00614.75
7.3.80.0030.00614.71
7.3.70.0040.01114.79
7.3.60.0070.00314.91
7.3.50.0060.00914.84
7.3.40.0070.01014.81
7.3.30.0000.01214.64
7.3.20.0040.01216.52
7.3.10.0080.01116.33
7.3.00.0060.00916.38
7.2.330.0140.00316.59
7.2.320.0120.00316.56
7.2.310.0140.00616.64
7.2.300.0070.01616.51
7.2.290.0030.01416.27
7.2.250.0090.00915.09
7.2.240.0070.01315.13
7.2.230.0070.01014.76
7.2.220.0100.00714.97
7.2.210.0060.00615.09
7.2.200.0100.00714.73
7.2.190.0090.00314.83
7.2.180.0030.01214.85
7.2.170.0070.00315.01
7.2.130.0080.00416.17
7.2.120.0060.00916.29
7.2.110.0130.00616.46
7.2.100.0140.00416.11
7.2.90.0210.00316.42
7.2.80.0080.01116.40
7.2.70.0050.01416.51
7.2.60.0120.00616.41
7.2.50.0220.00016.60
7.2.40.0150.00416.55
7.2.30.0200.00315.95
7.2.20.0070.01116.40
7.2.10.0070.00716.36
7.2.00.0090.00517.97
7.1.330.0070.00715.69
7.1.320.0030.00715.76
7.1.310.0080.00015.83
7.1.300.0060.00915.70
7.1.290.0030.01315.71
7.1.280.0070.00715.77
7.1.270.0070.00715.47
7.1.260.0000.01515.83
7.1.250.0070.01115.36
7.1.100.0190.00415.99
7.1.70.0000.00717.05
7.1.60.0060.01919.32
7.1.50.0160.00616.84
7.1.00.0000.08022.45
7.0.200.0070.00316.78
7.0.140.0070.07021.95
7.0.60.0070.07319.85
7.0.50.0070.04317.87
7.0.40.0070.08720.07
7.0.30.0200.06320.02
7.0.20.0270.06720.19
7.0.10.0130.04320.13
7.0.00.0100.07720.09
5.6.280.0030.07321.14
5.6.210.0070.08020.53
5.6.200.0070.04318.12
5.6.190.0100.04320.32
5.6.180.0170.04020.49
5.6.170.0330.07020.38
5.6.160.0100.08320.38
5.6.150.0100.06018.18
5.6.140.0000.08718.10
5.6.130.0030.04018.14
5.6.120.0000.08721.02
5.6.110.0230.06720.89
5.6.100.0100.08321.12
5.6.90.0070.09021.00
5.6.80.0030.08020.50
5.6.70.0030.06720.40
5.5.350.0030.08320.32
5.5.340.0070.04717.95
5.5.330.0100.07720.28
5.5.320.0330.06720.34
5.5.310.0100.04720.27
5.5.300.0030.07017.91
5.5.290.0070.03717.98
5.5.280.0100.08720.83
5.5.270.0070.05320.72
5.5.260.0000.04320.75
5.5.250.0070.07020.71
5.5.240.0100.08320.18
5.4.450.3200.04019.57
5.4.440.4000.03719.11
5.4.430.4070.04019.20
5.4.420.3530.04019.41
5.4.410.3230.03319.13
5.4.400.3830.04018.81
5.4.390.3600.03718.88
5.4.380.3970.03719.08
5.4.370.3400.03719.06
5.4.360.3400.03719.23
5.4.350.3870.04319.16
5.4.340.3170.03719.13
5.4.320.0030.05019.26
5.4.310.1330.04718.88
5.4.300.3530.03718.93
5.4.290.3570.04319.05
5.4.280.3400.04019.10
5.4.270.3370.03719.09
5.4.260.3270.03719.21
5.4.250.3630.03319.15
5.4.240.3670.03319.13
5.4.230.3430.04019.09
5.4.220.3400.02719.17
5.4.210.3900.03718.80
5.4.200.0130.07018.78
5.4.190.4200.03319.07
5.4.180.3670.03719.12
5.4.170.3570.03718.82
5.4.160.3500.03719.11
5.4.150.3600.03719.19
5.4.140.3800.04316.54
5.4.130.3830.04316.32
5.4.120.3630.03316.54
5.4.110.3330.03716.39
5.4.100.3070.03316.42
5.4.90.3630.02716.06
5.4.80.3470.03716.38
5.4.70.3600.02716.39
5.4.60.3430.03716.52
5.4.50.3330.03716.41
5.4.40.3400.03016.48
5.4.30.3430.03016.36
5.4.20.4270.03316.45
5.4.10.4230.04016.36
5.4.00.4330.03315.73
5.3.290.0030.07014.55
5.3.280.3430.03714.43
5.3.270.3530.04714.48
5.3.260.3770.04314.65
5.3.250.3570.04314.55
5.3.240.4400.03714.58
5.3.230.3830.03714.43
5.3.220.3830.04314.48
5.3.210.3400.04314.40
5.3.200.3630.03314.49
5.3.190.3700.03314.56
5.3.180.3670.04014.39
5.3.170.3700.04014.58
5.3.160.3600.03714.41
5.3.150.3770.03014.54
5.3.140.3400.04014.39
5.3.130.3430.04314.50
5.3.120.3530.04314.52
5.3.110.4200.04014.63
5.3.100.4330.04014.00
5.3.90.4330.02314.05
5.3.80.4000.04013.96
5.3.70.4100.03713.85
5.3.60.4300.03014.03
5.3.50.4400.03713.85
5.3.40.3600.03313.99
5.3.30.3630.03313.74
5.3.20.3100.03313.63
5.3.10.4170.03313.68
5.3.00.4230.03313.52
5.2.170.3330.03011.04
5.2.160.3130.03711.03
5.2.150.2800.02711.03
5.2.140.3130.02711.19
5.2.130.3170.02711.12
5.2.120.2900.03010.95
5.2.110.3370.03310.96
5.2.100.3170.03010.93
5.2.90.3230.03710.96
5.2.80.3100.02711.25
5.2.70.2970.02310.96
5.2.60.3070.03011.09
5.2.50.3630.02710.96
5.2.40.2430.03010.88
5.2.30.2400.03011.01
5.2.20.2630.03310.96
5.2.10.2600.03310.78
5.2.00.2530.03010.80
5.1.60.2070.0279.89
5.1.50.2630.0279.96
5.1.40.2230.02710.14
5.1.30.2270.02710.48
5.1.20.2570.02310.44
5.1.10.2070.03010.15
5.1.00.2270.0209.96
5.0.50.1530.0208.90
5.0.40.1670.0238.90
5.0.30.1700.0308.90
5.0.20.1370.0208.90
5.0.10.1670.0208.90
5.0.00.1530.0278.90
4.4.90.1400.0178.90
4.4.80.1270.0178.90
4.4.70.1200.0138.90
4.4.60.1230.0138.90
4.4.50.1430.0208.90
4.4.40.1300.0278.90
4.4.30.1370.0208.90
4.4.20.0900.0208.90
4.4.10.1130.0178.90
4.4.00.1630.0238.90
4.3.110.1630.0208.90
4.3.100.1670.0138.90
4.3.90.1670.0138.90
4.3.80.1670.0238.90
4.3.70.1670.0178.90
4.3.60.1370.0138.90
4.3.50.1670.0138.90
4.3.40.1600.0238.90
4.3.30.0770.0138.90
4.3.20.0670.0178.90
4.3.10.0830.0138.90
4.3.00.0870.0238.90

preferences:
39.27 ms | 401 KiB | 5 Q