3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr_count('aaa', 'a', 0, 0)); var_dump(substr_count('aaa', 'a', 0, 1));

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)
8.3.70.0210.00016.25
8.3.60.0040.01116.46
8.3.50.0120.00821.81
8.3.40.0100.00318.45
8.3.30.0110.00418.61
8.3.20.0070.00020.07
8.3.10.0040.00421.77
8.3.00.0030.00619.26
8.2.190.0100.01316.58
8.2.180.0170.00316.32
8.2.170.0090.00622.96
8.2.160.0070.00719.21
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0050.00320.43
8.2.120.0020.00526.35
8.2.110.0070.01021.00
8.2.100.0040.00717.66
8.2.90.0050.00318.92
8.2.80.0040.00417.97
8.2.70.0050.00317.38
8.2.60.0050.00217.68
8.2.50.0000.00818.10
8.2.40.0040.00421.95
8.2.30.0040.00419.02
8.2.20.0040.00417.93
8.2.10.0000.00818.23
8.2.00.0030.00317.98
8.1.280.0220.00025.92
8.1.270.0050.00323.99
8.1.260.0040.00428.09
8.1.250.0050.00328.09
8.1.240.0030.00523.79
8.1.230.0040.00719.23
8.1.220.0040.00417.74
8.1.210.0000.00918.77
8.1.200.0060.00317.00
8.1.190.0040.00417.10
8.1.180.0040.00418.10
8.1.170.0090.00318.55
8.1.160.0040.00418.73
8.1.150.0050.00220.06
8.1.140.0000.00719.38
8.1.130.0000.00718.84
8.1.120.0070.00017.37
8.1.110.0040.00417.35
8.1.100.0040.00417.19
8.1.90.0050.00317.30
8.1.80.0000.00717.30
8.1.70.0000.00717.21
8.1.60.0000.00717.41
8.1.50.0000.00717.41
8.1.40.0050.00217.42
8.1.30.0040.00417.48
8.1.20.0030.00617.36
8.1.10.0040.00417.39
8.1.00.0040.00417.29
8.0.300.0030.00618.77
8.0.290.0000.00716.58
8.0.280.0000.00818.36
8.0.270.0030.00317.13
8.0.260.0050.00518.90
8.0.250.0030.00316.79
8.0.240.0100.00016.77
8.0.230.0040.00416.77
8.0.220.0000.00616.77
8.0.210.0040.00416.82
8.0.200.0000.00716.86
8.0.190.0000.00816.86
8.0.180.0090.00016.80
8.0.170.0000.00816.80
8.0.160.0000.00716.80
8.0.150.0050.00516.68
8.0.140.0000.00816.67
8.0.130.0000.00613.16
8.0.120.0000.00716.75
8.0.110.0000.00716.77
8.0.100.0000.00716.88
8.0.90.0070.00016.76
8.0.80.0000.01516.64
8.0.70.0070.00016.55
8.0.60.0040.00416.76
8.0.50.0070.00016.80
8.0.30.0060.01217.00
8.0.20.0130.00717.40
8.0.10.0060.00316.82
8.0.00.0130.00316.51
7.4.330.0030.00215.55
7.4.320.0030.00316.34
7.4.300.0000.00716.37
7.4.290.0000.00716.38
7.4.280.0040.00416.27
7.4.270.0030.00316.44
7.4.260.0000.00816.32
7.4.250.0000.00816.34
7.4.240.0000.00716.39
7.4.230.0030.00316.47
7.4.220.0070.01116.39
7.4.210.0070.01016.51
7.4.200.0040.00416.47
7.4.160.0060.00916.40
7.4.150.0110.00717.40
7.4.140.0130.00817.86
7.4.130.0120.01216.20
7.4.120.0110.00916.34
7.4.110.0120.00616.36
7.4.100.0090.00616.27
7.4.90.0070.01016.42
7.4.80.0110.00819.39
7.4.70.0060.01316.25
7.4.60.0100.00616.33
7.4.50.0000.01616.26
7.4.40.0120.00316.51
7.4.30.0060.01516.25
7.4.00.0070.00415.03
7.3.330.0000.00512.96
7.3.320.0000.00613.07
7.3.310.0060.00016.06
7.3.300.0030.00316.17
7.3.290.0070.00015.98
7.3.280.0070.01016.17
7.3.270.0080.00817.40
7.3.260.0070.01316.45
7.3.240.0100.00716.28
7.3.230.0080.00816.09
7.3.210.0080.01116.26
7.3.200.0100.00716.38
7.3.190.0060.00916.29
7.3.180.0070.01416.26
7.3.170.0090.00616.18
7.3.160.0100.01016.19
7.2.330.0170.00316.18
7.2.320.0170.00016.44
7.2.310.0090.01216.54
7.2.300.0070.01016.39
7.2.290.0130.00316.39
7.2.60.0040.01116.80
7.2.00.0040.00819.23
7.1.200.0050.00315.79
7.1.70.0040.00417.05
7.1.60.0000.01017.10
7.1.50.0090.00616.67
7.1.40.0130.01334.16
7.1.30.0070.02034.01
7.1.20.0200.00734.38
7.1.10.0070.00716.47
7.1.00.0000.01016.25
7.0.200.0070.00716.71
7.0.180.0000.01015.93
7.0.170.0000.01315.98
7.0.160.0030.01015.94
7.0.150.0030.01015.91
7.0.140.0470.00716.00
7.0.130.0070.00716.31
7.0.120.0070.00316.18
7.0.110.0030.01016.22
7.0.100.0000.01016.05
7.0.90.0070.00716.08
7.0.80.0030.01016.14
7.0.70.0000.01016.05
7.0.60.0030.00715.88
7.0.50.0100.00316.09
7.0.40.0000.01016.30
7.0.30.0030.00716.41
7.0.20.0030.01016.37
7.0.10.0100.00316.16
7.0.00.0000.01016.20

preferences:
41.7 ms | 401 KiB | 5 Q