3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr_count ('haystack', 'tack', 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)
8.3.60.0140.00716.50
8.3.50.0030.01616.61
8.3.40.0100.00718.42
8.3.30.0070.00718.63
8.3.20.0050.00319.02
8.3.10.0040.00421.91
8.3.00.0080.00019.21
8.2.180.0090.00616.50
8.2.170.0090.00922.96
8.2.160.0100.00320.19
8.2.150.0030.00525.66
8.2.140.0000.00724.66
8.2.130.0000.00726.16
8.2.120.0080.00019.70
8.2.110.0030.00622.08
8.2.100.0080.00417.53
8.2.90.0030.00517.50
8.2.80.0050.00317.97
8.2.70.0080.00017.90
8.2.60.0050.00317.97
8.2.50.0040.00418.10
8.2.40.0040.00420.34
8.2.30.0000.00719.12
8.2.20.0030.00517.89
8.2.10.0000.00717.91
8.2.00.0070.00017.52
8.1.280.0100.01025.92
8.1.270.0000.00823.96
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0030.00623.78
8.1.230.0090.00323.98
8.1.220.0030.00517.74
8.1.210.0060.00318.77
8.1.200.0000.00917.22
8.1.190.0070.00020.20
8.1.180.0000.00818.10
8.1.170.0000.00918.59
8.1.160.0030.00318.91
8.1.150.0040.00420.21
8.1.140.0040.00419.45
8.1.130.0000.00817.56
8.1.120.0040.00417.36
8.1.110.0040.00417.20
8.1.100.0040.00517.30
8.1.90.0040.00417.30
8.1.80.0000.00817.29
8.1.70.0000.00717.29
8.1.60.0050.00317.40
8.1.50.0080.00017.46
8.1.40.0040.00717.43
8.1.30.0000.00817.51
8.1.20.0050.00317.51
8.1.10.0040.00417.26
8.1.00.0030.00617.38
8.0.300.0040.00419.89
8.0.290.0000.00816.58
8.0.280.0040.00418.31
8.0.270.0000.00716.59
8.0.260.0060.00017.04
8.0.250.0030.00516.78
8.0.240.0070.00016.82
8.0.230.0000.00816.77
8.0.220.0000.00916.80
8.0.210.0060.00016.71
8.0.200.0090.00016.79
8.0.190.0020.00516.87
8.0.180.0040.00416.66
8.0.170.0000.00816.75
8.0.160.0000.00716.77
8.0.150.0040.00416.64
8.0.140.0080.00016.70
8.0.130.0040.00413.14
8.0.120.0080.00016.71
8.0.110.0000.00816.75
8.0.100.0000.00816.58
8.0.90.0000.00716.64
8.0.80.0090.00616.71
8.0.70.0040.00416.75
8.0.60.0040.00416.70
8.0.50.0000.00816.70
8.0.30.0110.00916.96
8.0.20.0120.00717.40
8.0.10.0040.00416.97
8.0.00.0100.00916.55
7.4.330.0050.00015.55
7.4.320.0000.00916.47
7.4.300.0060.00016.37
7.4.290.0060.00316.29
7.4.280.0120.00016.35
7.4.270.0000.00716.44
7.4.260.0070.00016.24
7.4.250.0070.00016.31
7.4.240.0030.00516.51
7.4.230.0000.00716.24
7.4.220.0060.01316.50
7.4.210.0040.01216.42
7.4.200.0040.00416.46
7.4.160.0130.00516.36
7.4.150.0110.00617.40
7.4.140.0050.01417.86
7.4.130.0050.01216.33
7.4.120.0100.00716.37
7.4.110.0130.00316.36
7.4.100.0130.00616.37
7.4.90.0070.01016.18
7.4.80.0040.01319.39
7.4.70.0180.00016.25
7.4.60.0090.00616.45
7.4.50.0080.00416.01
7.4.40.0160.00316.39
7.4.30.0070.01016.28
7.4.00.0070.00814.81
7.3.330.0050.00012.96
7.3.320.0050.00012.88
7.3.310.0070.00015.96
7.3.300.0060.00016.23
7.3.290.0080.00616.08
7.3.280.0100.00816.16
7.3.270.0030.01417.40
7.3.260.0070.01216.33
7.3.250.0080.00816.26
7.3.240.0090.01316.25
7.3.230.0120.00416.39
7.3.210.0070.01016.21
7.3.200.0120.00616.13
7.3.190.0120.00816.30
7.3.180.0030.01715.97
7.3.170.0070.01316.09
7.3.160.0090.01216.11
7.2.330.0100.00716.30
7.2.320.0070.01016.22
7.2.310.0090.00916.33
7.2.300.0120.00616.43
7.2.290.0060.00916.58
7.2.60.0030.01316.79
7.2.00.0100.00819.19
7.1.200.0060.00615.70
7.1.100.0040.00818.05
7.1.70.0000.00717.00
7.1.60.0120.00616.85
7.1.50.0260.01034.75
7.1.00.0100.07022.45
7.0.200.0160.00814.78
7.0.130.0100.05722.04
7.0.120.0070.06021.93
7.0.110.0070.06022.10
7.0.100.0070.05722.00
7.0.90.0130.05322.11
7.0.80.0070.05722.18
7.0.70.0170.06722.18
7.0.60.0100.05022.08
7.0.50.0130.05322.00
7.0.40.0100.05022.14
7.0.30.0030.05722.12
7.0.20.0100.06022.03
7.0.10.0070.05322.11
7.0.00.0000.06022.11
5.6.280.0100.05021.10
5.6.270.0100.06320.98
5.6.260.0030.06021.02
5.6.250.0130.04720.96
5.6.240.0030.06020.87
5.6.230.0130.05321.05
5.6.220.0000.06021.00
5.6.210.0070.05720.95
5.6.200.0100.05320.93
5.6.190.0030.06020.82
5.6.180.0030.06020.85
5.6.170.0030.05721.01
5.6.160.0170.05020.74
5.6.150.0200.05021.00
5.6.140.0100.05721.01
5.6.130.0130.05021.00
5.6.120.0100.05320.73
5.6.110.0130.05320.83
5.6.100.0170.05020.82
5.6.90.0030.06321.00
5.6.80.0170.04020.24
5.6.70.0100.04720.45
5.6.60.0000.06320.31
5.6.50.0070.05320.18
5.6.40.0070.05020.15
5.6.30.0030.05320.18
5.6.20.0070.05720.15
5.6.10.0030.05320.31
5.6.00.0070.05020.08

preferences:
60.67 ms | 401 KiB | 5 Q