3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'string'; var_dump(substr($str, 0, 0));

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)
8.3.70.0110.00718.18
8.3.60.0180.00018.43
8.3.50.0140.00621.92
8.3.40.0070.01418.72
8.3.30.0060.00920.22
8.3.20.0080.00018.53
8.3.10.0020.00520.92
8.3.00.0090.00019.67
8.2.180.0140.00016.38
8.2.170.0040.01122.96
8.2.160.0130.00320.39
8.2.150.0040.00424.18
8.2.140.0020.00524.66
8.2.130.0070.00726.16
8.2.120.0080.00019.36
8.2.110.0060.00320.52
8.2.100.0080.00317.59
8.2.90.0080.00017.91
8.2.80.0030.00517.97
8.2.70.0220.00017.00
8.2.60.0030.00617.80
8.2.50.0000.01018.07
8.2.40.0000.00818.22
8.2.30.0040.00421.23
8.2.20.0070.00017.62
8.2.10.0000.00717.52
8.2.00.0040.00417.67
8.1.280.0030.01225.92
8.1.270.0000.00723.99
8.1.260.0050.00326.35
8.1.250.0070.00028.09
8.1.240.0060.00622.03
8.1.230.0090.00322.67
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0000.00917.09
8.1.190.0000.00817.53
8.1.180.0040.00418.10
8.1.170.0060.00218.45
8.1.160.0040.00418.86
8.1.150.0040.00418.57
8.1.140.0040.00417.38
8.1.130.0040.00417.81
8.1.120.0040.00317.40
8.1.110.0000.00717.40
8.1.100.0000.00817.43
8.1.90.0000.00717.24
8.1.80.0030.00517.40
8.1.70.0030.00317.32
8.1.60.0030.00617.39
8.1.50.0050.00217.27
8.1.40.0040.00417.43
8.1.30.0000.00817.60
8.1.20.0000.00917.62
8.1.10.0000.00817.43
8.1.00.0040.00417.27
8.0.300.0040.00419.90
8.0.290.0000.00716.93
8.0.280.0030.00318.31
8.0.270.0070.00017.18
8.0.260.0040.00416.62
8.0.250.0040.00416.90
8.0.240.0040.00416.87
8.0.230.0000.00716.85
8.0.220.0070.00016.70
8.0.210.0040.00416.81
8.0.200.0030.00316.89
8.0.190.0060.00316.78
8.0.180.0040.00416.75
8.0.170.0000.00716.85
8.0.160.0070.00016.91
8.0.150.0030.00316.80
8.0.140.0000.00716.82
8.0.130.0050.00013.18
8.0.120.0080.00016.82
8.0.110.0040.00416.68
8.0.100.0000.00716.80
8.0.90.0040.00416.77
8.0.80.0030.01216.85
8.0.70.0030.00516.88
8.0.60.0000.00816.70
8.0.50.0000.00716.62
8.0.30.0100.00816.96
8.0.20.0070.01317.40
8.0.10.0050.00316.74
8.0.00.0140.00816.62
7.4.330.0020.00216.76
7.4.320.0000.00616.45
7.4.300.0020.00516.43
7.4.290.0000.00716.53
7.4.280.0040.00416.50
7.4.270.0000.00716.52
7.4.260.0030.00313.21
7.4.250.0000.00916.50
7.4.240.0000.00716.44
7.4.230.0030.00316.34
7.4.220.0150.00016.33
7.4.210.0090.00916.49
7.4.200.0040.00416.29
7.4.190.0040.00416.70
7.4.160.0060.01216.47
7.4.150.0090.00917.40
7.4.140.0110.01317.86
7.4.130.0100.00916.37
7.4.120.0090.01116.37
7.4.110.0040.01416.57
7.4.100.0070.01616.58
7.4.90.0120.00616.33
7.4.80.0100.00719.39
7.4.70.0040.01216.41
7.4.60.0060.00916.50
7.4.50.0030.00516.04
7.4.40.0120.00422.77
7.4.30.0060.01216.66
7.4.10.0100.01015.76
7.4.00.0050.01215.34
7.3.330.0050.00012.98
7.3.320.0000.00613.02
7.3.310.0070.00016.08
7.3.300.0030.00316.04
7.3.290.0070.00716.11
7.3.280.0100.00716.14
7.3.270.0150.00417.40
7.3.260.0070.01018.24
7.3.250.0100.00816.20
7.3.240.0140.00916.02
7.3.230.0120.00616.39
7.3.210.0120.01116.32
7.3.200.0060.01219.39
7.3.190.0130.00316.29
7.3.180.0040.01216.32
7.3.170.0100.00616.27
7.3.160.0090.00616.46
7.3.130.0120.00615.26
7.3.120.0050.01015.21
7.3.110.0070.01015.45
7.3.100.0080.00815.25
7.3.90.0050.00915.29
7.3.80.0060.00715.29
7.3.70.0090.00515.27
7.3.60.0030.01315.39
7.3.50.0020.00715.44
7.3.40.0080.00415.28
7.3.30.0050.00915.44
7.3.20.0020.01017.18
7.3.10.0050.00717.22
7.3.00.0100.00317.23
7.2.330.0070.01016.30
7.2.320.0110.00816.61
7.2.310.0110.00716.48
7.2.300.0100.00616.14
7.2.290.0100.00616.24
7.2.260.0080.00915.67
7.2.250.0140.00715.60
7.2.240.0050.01015.67
7.2.230.0070.00815.52
7.2.220.0060.00815.45
7.2.210.0040.01215.50
7.2.200.0080.00615.48
7.2.190.0060.00815.53
7.2.180.0000.01115.45
7.2.170.0080.00615.48
7.2.160.0030.01015.63
7.2.150.0060.00817.24
7.2.140.0090.00317.38
7.2.130.0050.00817.36
7.2.120.0050.00817.33
7.2.110.0110.00517.41
7.2.100.0060.00817.27
7.2.90.0030.01217.58
7.2.80.0060.00917.38
7.2.70.0060.00817.60
7.2.60.0050.00717.28
7.2.50.0070.00417.56
7.2.40.0050.00717.43
7.2.30.0030.00817.28
7.2.20.0050.01017.39
7.2.10.0050.01017.40
7.2.00.0080.00817.87
7.1.330.0050.01016.55
7.1.320.0050.00516.45
7.1.310.0080.00516.46
7.1.300.0050.00916.33
7.1.290.0020.01016.56
7.1.280.0030.01116.38
7.1.270.0040.00816.49
7.1.260.0080.00416.39
7.1.250.0070.00416.30
7.1.240.0020.01116.50
7.1.230.0070.00616.42
7.1.220.0060.00616.48
7.1.210.0080.00716.50
7.1.200.0030.00716.27
7.1.190.0050.00616.42
7.1.180.0090.00616.43
7.1.170.0050.00616.49
7.1.160.0020.00916.46
7.1.150.0070.00516.42
7.1.140.0050.00816.26
7.1.130.0060.00716.50
7.1.120.0040.00716.41
7.1.110.0030.01116.34
7.1.100.0080.00716.97
7.1.90.0030.01116.49
7.1.80.0060.00616.34
7.1.70.0110.00216.65
7.1.60.0040.01016.67
7.1.50.0100.00316.60
7.1.40.0060.00916.50
7.1.30.0060.00716.46
7.1.20.0070.00516.48
7.1.10.0020.01116.49
7.1.00.0040.00716.43
7.0.330.0050.00716.05
7.0.320.0080.00616.18
7.0.310.0060.00716.10
7.0.300.0040.00716.05
7.0.290.0050.00616.14
7.0.280.0030.00916.09
7.0.270.0080.00516.11
7.0.260.0080.00716.21
7.0.250.0090.00516.20
7.0.240.0060.00816.08
7.0.230.0050.00516.20
7.0.220.0050.00816.21
7.0.210.0050.00515.99
7.0.200.0080.00816.28
7.0.190.0040.00916.22
7.0.180.0060.00616.06
7.0.170.0060.00716.24
7.0.160.0050.00616.11
7.0.150.0060.00616.06
7.0.140.0070.00616.06
7.0.130.0050.00716.28
7.0.120.0060.00816.17
7.0.110.0040.00816.26
7.0.100.0060.00816.22
7.0.90.0050.01116.18
7.0.80.0040.00716.25
7.0.70.0060.00616.00
7.0.60.0040.01016.18
7.0.50.0050.00816.16
7.0.40.0050.00614.47
7.0.30.0010.01114.39
7.0.20.0050.00514.51
7.0.10.0080.00314.52
7.0.00.0060.00614.48
5.6.400.0030.00914.96
5.6.390.0100.00515.08
5.6.380.0050.01114.85
5.6.370.0050.01014.79
5.6.360.0050.00915.03
5.6.350.0050.00814.84
5.6.340.0020.01115.19
5.6.330.0040.00814.95
5.6.320.0030.01114.89
5.6.310.0050.00715.11
5.6.300.0070.01816.94
5.6.290.0040.02316.97
5.6.280.0060.01816.88
5.6.270.0080.02816.89
5.6.260.0050.02116.96
5.6.250.0050.01816.95
5.6.240.0060.01817.03
5.6.230.0090.01517.04
5.6.220.0060.01916.76
5.6.210.0060.03117.04
5.6.200.0050.02016.87
5.6.190.0070.01716.88
5.6.180.0090.02317.09
5.6.170.0030.02316.82
5.6.160.0020.02416.79
5.6.150.0070.02016.89
5.6.140.0040.02516.88
5.6.130.0090.01617.06
5.6.120.0060.01817.03
5.6.110.0060.02816.93
5.6.100.0040.02316.97
5.6.90.0080.01817.00
5.6.80.0020.02216.70
5.6.70.0060.02716.56
5.6.60.0070.01616.66
5.6.50.0070.02516.63
5.6.40.0090.01716.68
5.6.30.0030.02416.73
5.6.20.0060.01716.53
5.6.10.0040.01916.71
5.6.00.0050.01716.62
5.5.380.0040.01915.84
5.5.370.0050.01715.67
5.5.360.0060.03115.84
5.5.350.0040.02315.78
5.5.340.0040.02015.93
5.5.330.0040.01715.90
5.5.320.0030.03215.88
5.5.310.0040.02315.91
5.5.300.0050.01815.81
5.5.290.0080.01715.88
5.5.280.0100.01415.90
5.5.270.0060.01515.72
5.5.260.0110.01515.88
5.5.250.0030.02215.70
5.5.240.0070.01515.69
5.5.230.0070.02215.69
5.5.220.0030.02215.75
5.5.210.0020.02815.53
5.5.200.0030.01915.65
5.5.190.0040.02215.74
5.5.180.0010.02315.48
5.5.170.0090.00514.58
5.5.160.0070.01815.56
5.5.150.0070.01415.62
5.5.140.0020.02115.58
5.5.130.0060.02115.71
5.5.120.0030.02015.68
5.5.110.0070.01615.58
5.5.100.0050.01615.61
5.5.90.0040.02015.54
5.5.80.0040.01715.66
5.5.70.0060.01815.67
5.5.60.0040.01915.67
5.5.50.0040.01715.62
5.5.40.0030.01815.47
5.5.30.0040.01715.50
5.5.20.0030.01815.63
5.5.10.0050.01715.49
5.5.00.0050.02815.42
5.4.450.0050.01514.17
5.4.440.0020.02514.24
5.4.430.0040.01914.28
5.4.420.0020.01614.19
5.4.410.0050.01514.13
5.4.400.0070.01414.04
5.4.390.0030.01714.06
5.4.380.0050.02914.13
5.4.370.0090.01314.05
5.4.360.0030.01914.10
5.4.350.0030.02514.12
5.4.340.0030.01614.11
5.4.330.0060.00311.62
5.4.320.0070.01514.10
5.4.310.0040.01914.07
5.4.300.0000.02014.13
5.4.290.0010.01914.06
5.4.280.0010.01814.03
5.4.270.0020.01914.12
5.4.260.0020.02014.06
5.4.250.0050.02114.12
5.4.240.0060.01313.95
5.4.230.0030.01814.10
5.4.220.0050.01514.14
5.4.210.0060.01414.03
5.4.200.0070.01614.09
5.4.190.0060.01314.11
5.4.180.0010.01714.00
5.4.170.0060.02314.14
5.4.160.0010.02114.06
5.4.150.0030.01714.00
5.4.140.0040.01713.21
5.4.130.0020.02113.27
5.4.120.0040.01613.19
5.4.110.0060.01713.27
5.4.100.0050.01413.31
5.4.90.0040.01213.30
5.4.80.0030.01813.35
5.4.70.0040.01613.17
5.4.60.0010.01913.31
5.4.50.0020.02113.26
5.4.40.0080.01213.35
5.4.30.0040.01413.19
5.4.20.0010.01913.32
5.4.10.0050.01613.27
5.4.00.0030.01713.05
5.3.290.0020.02012.79
5.3.280.0030.01512.75
5.3.270.0040.02112.88
5.3.260.0010.01712.80
5.3.250.0030.01712.86
5.3.240.0030.01612.60
5.3.230.0010.01912.75
5.3.220.0060.01612.82
5.3.210.0050.01612.84
5.3.200.0020.01712.67
5.3.190.0040.02912.76
5.3.180.0040.01712.86
5.3.170.0030.01812.87
5.3.160.0010.01812.82
5.3.150.0040.01612.86
5.3.140.0040.01712.77
5.3.130.0060.01312.78
5.3.120.0080.02212.79
5.3.110.0010.02012.79
5.3.100.0030.01812.75
5.3.90.0010.01912.86
5.3.80.0050.02712.68
5.3.70.0030.02012.60
5.3.60.0050.01312.82
5.3.50.0040.01812.75
5.3.40.0040.01512.71
5.3.30.0040.01612.76
5.3.20.0040.01512.70
5.3.10.0040.01612.68
5.3.00.0050.01612.67
5.2.170.0000.03415.16
5.2.160.0000.03515.16
5.2.150.0030.02915.16
5.2.140.0000.03315.16
5.2.130.0000.03215.16
5.2.120.0030.02615.16
5.2.110.0030.03315.16
5.2.100.0000.03215.16
5.2.90.0000.03015.16
5.2.80.0000.03015.16
5.2.70.0090.02115.16
5.2.60.0000.03015.16
5.2.50.0000.03915.16
5.2.40.0000.03015.16
5.2.30.0000.06215.16
5.2.20.0000.03015.16
5.2.10.0000.03515.16
5.2.00.0030.03715.16
5.1.60.0000.02615.16
5.1.50.0030.02315.16
5.1.40.0000.03115.16
5.1.30.0000.02715.16
5.1.20.0000.02715.16
5.1.10.0000.02615.16
5.1.00.0070.02415.16
5.0.50.0000.02315.16
5.0.40.0030.01715.16
5.0.30.0000.03215.16
5.0.20.0000.02415.16
5.0.10.0000.02215.16
5.0.00.0000.03115.16
4.4.90.0030.01815.16
4.4.80.0000.02615.16
4.4.70.0040.02115.16
4.4.60.0000.01815.16
4.4.50.0000.01615.16
4.4.40.0070.02815.16
4.4.30.0060.01015.16
4.4.20.0000.01715.16
4.4.10.0000.01715.16
4.4.00.0000.02715.16
4.3.110.0000.01715.16
4.3.100.0030.02015.16
4.3.90.0000.02215.16
4.3.80.0000.02515.16
4.3.70.0000.01515.16
4.3.60.0000.01515.16
4.3.50.0030.02115.16
4.3.40.0070.02015.16
4.3.30.0000.01715.16
4.3.20.0000.02115.16
4.3.10.0030.01315.16
4.3.00.0030.01515.16

preferences:
37.91 ms | 401 KiB | 5 Q