3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr_count("aaa", "a", 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)
8.3.60.0100.00716.38
8.3.50.0140.00619.97
8.3.40.0040.01118.63
8.3.30.0070.00718.54
8.3.20.0030.00321.76
8.3.10.0030.00621.85
8.3.00.0060.00322.00
8.2.180.0180.00016.50
8.2.170.0140.00422.96
8.2.160.0070.00722.13
8.2.150.0000.00724.18
8.2.140.0030.00524.66
8.2.130.0030.00519.35
8.2.120.0040.00426.35
8.2.110.0080.00020.91
8.2.100.0040.00717.59
8.2.90.0000.00819.17
8.2.80.0040.00417.97
8.2.70.0000.00817.23
8.2.60.0030.00617.38
8.2.50.0000.00918.10
8.2.40.0040.00419.34
8.2.30.0030.00519.21
8.2.20.0000.00817.98
8.2.10.0040.00417.99
8.2.00.0030.00617.59
8.1.280.0070.01325.92
8.1.270.0050.00224.02
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0030.00622.61
8.1.230.0120.00017.70
8.1.220.0000.00817.74
8.1.210.0050.00318.77
8.1.200.0090.00017.23
8.1.190.0000.00816.98
8.1.180.0060.00318.10
8.1.170.0060.00318.64
8.1.160.0000.00718.68
8.1.150.0000.00718.91
8.1.140.0000.00719.43
8.1.130.0000.00718.98
8.1.120.0030.00317.34
8.1.110.0000.00717.21
8.1.100.0000.00717.22
8.1.90.0000.00717.32
8.1.80.0040.00417.37
8.1.70.0030.00317.29
8.1.60.0000.00817.48
8.1.50.0000.00817.40
8.1.40.0000.00917.24
8.1.30.0080.00017.50
8.1.20.0040.00417.36
8.1.10.0040.00417.34
8.1.00.0020.00517.30
8.0.300.0070.00018.77
8.0.290.0040.00416.58
8.0.280.0030.00318.30
8.0.270.0000.00916.69
8.0.260.0030.00317.12
8.0.250.0030.00316.84
8.0.240.0060.00316.85
8.0.230.0000.00616.73
8.0.220.0070.00016.75
8.0.210.0030.00616.79
8.0.200.0000.00716.78
8.0.190.0070.00016.68
8.0.180.0040.00416.86
8.0.170.0040.00416.76
8.0.160.0000.00816.75
8.0.150.0030.00316.72
8.0.140.0080.00016.75
8.0.130.0000.00613.19
8.0.120.0040.00416.72
8.0.110.0070.00016.70
8.0.100.0090.00016.66
8.0.90.0000.00716.67
8.0.80.0100.01016.82
8.0.70.0000.00716.74
8.0.60.0040.00416.79
8.0.50.0040.00416.86
8.0.30.0130.00616.82
8.0.20.0100.00917.40
8.0.10.0070.00016.99
8.0.00.0100.00716.54
7.4.330.0030.00315.55
7.4.320.0000.00716.38
7.4.300.0060.00016.50
7.4.290.0030.00316.36
7.4.280.0070.00016.39
7.4.270.0000.00716.38
7.4.260.0070.00016.36
7.4.250.0040.00416.41
7.4.240.0000.00716.27
7.4.230.0040.00416.44
7.4.220.0130.00616.19
7.4.210.0070.01016.50
7.4.200.0000.00716.48
7.4.160.0060.01016.28
7.4.150.0070.01017.40
7.4.140.0110.00717.86
7.4.130.0080.01216.23
7.4.120.0100.00916.31
7.4.110.0120.00816.46
7.4.100.0120.00616.40
7.4.90.0130.00616.55
7.4.80.0110.00619.39
7.4.70.0150.00616.47
7.4.60.0070.01016.49
7.4.50.0100.00616.25
7.4.40.0070.01016.43
7.4.30.0030.01616.57
7.4.10.0100.00715.02
7.4.00.0100.00814.88
7.3.330.0000.00613.08
7.3.320.0030.00312.88
7.3.310.0030.00316.21
7.3.300.0060.00016.17
7.3.290.0080.00816.07
7.3.280.0090.00816.13
7.3.270.0120.01017.40
7.3.260.0100.00816.27
7.3.250.0090.00916.18
7.3.240.0120.01016.30
7.3.230.0150.00316.13
7.3.210.0120.01216.08
7.3.200.0110.00616.47
7.3.190.0120.00416.34
7.3.180.0090.00715.98
7.3.170.0170.00316.19
7.3.160.0130.00316.45
7.3.130.0030.01614.61
7.3.120.0120.00914.71
7.3.110.0110.00714.84
7.3.100.0090.00614.47
7.3.90.0030.00914.68
7.3.80.0030.01314.57
7.3.70.0040.01214.69
7.3.60.0040.00714.59
7.3.50.0000.01814.50
7.3.40.0070.00714.78
7.3.30.0030.01014.52
7.3.20.0060.00916.46
7.3.10.0060.00916.59
7.3.00.0040.00416.42
7.2.330.0090.01016.16
7.2.320.0080.01116.41
7.2.310.0120.01016.33
7.2.300.0090.01516.21
7.2.290.0090.00916.08
7.2.260.0040.01215.02
7.2.250.0110.01114.71
7.2.240.0070.00714.67
7.2.230.0120.00014.75
7.2.220.0000.01114.98
7.2.210.0030.01214.58
7.2.200.0060.00614.71
7.2.190.0070.01014.73
7.2.180.0040.00414.98
7.2.170.0070.00714.76
7.2.160.0080.00614.62
7.2.150.0030.01016.58
7.2.140.0000.01216.73
7.2.130.0090.00616.45
7.2.120.0070.00716.79
7.2.110.0090.00316.69
7.2.100.0050.00516.70
7.2.90.0110.00416.45
7.2.80.0050.00516.45
7.2.70.0070.01116.48
7.2.60.0100.00116.77
7.2.50.0030.00616.81
7.2.40.0070.00716.81
7.2.30.0030.01216.84
7.2.20.0060.01216.44
7.2.10.0030.01016.73
7.2.00.0080.00617.86
7.1.330.0100.00715.51
7.1.320.0070.00315.24
7.1.310.0110.00315.41
7.1.300.0100.00315.66
7.1.290.0060.00615.52
7.1.280.0030.00715.66
7.1.270.0040.00815.74
7.1.260.0040.00715.67
7.1.250.0000.01315.76
7.1.240.0000.01315.60
7.1.230.0030.00915.70
7.1.220.0040.00715.45
7.1.210.0060.00315.37
7.1.200.0070.00515.55
7.1.190.0150.00415.75
7.1.180.0000.01215.64
7.1.170.0110.00415.72
7.1.160.0000.00915.44
7.1.150.0060.00915.73
7.1.140.0030.00615.62
7.1.130.0090.00315.55
7.1.120.0070.00715.46
7.1.110.0090.00315.73
7.1.100.0000.01015.58
7.1.90.0070.00715.68
7.1.80.0040.01115.57
7.1.70.0050.00716.30
7.1.60.0040.01016.41
7.1.50.0040.00716.24
7.1.40.0080.00216.06
7.1.30.0070.00716.10
7.1.20.0080.00416.00
7.1.10.0050.00616.03
7.1.00.0060.00616.06
7.0.330.0070.00714.93
7.0.320.0060.00314.98
7.0.310.0150.00014.83
7.0.300.0110.00414.82
7.0.290.0050.00314.95
7.0.280.0050.00315.39
7.0.270.0120.00315.13
7.0.260.0060.00315.32
7.0.250.0120.00015.32
7.0.240.0070.00715.27
7.0.230.0040.01115.23
7.0.220.0040.00415.36
7.0.210.0000.01115.44
7.0.200.0040.00815.92
7.0.190.0050.00715.96
7.0.180.0040.00915.88
7.0.170.0030.00715.89
7.0.160.0050.00515.81
7.0.150.0040.00715.88
7.0.140.0050.00716.00
7.0.130.0030.00915.85
7.0.120.0070.00315.88
7.0.110.0030.00915.95
7.0.100.0040.00615.85
7.0.90.0000.01215.92
7.0.80.0030.00615.96
7.0.70.0030.00715.75
7.0.60.0040.00515.79
7.0.50.0030.00815.89
7.0.40.0010.00915.03
7.0.30.0060.00414.90
7.0.20.0030.00814.89
7.0.10.0050.00614.95
7.0.00.0040.00714.80
5.6.400.0080.00813.90
5.6.390.0000.01414.25
5.6.380.0100.00314.33
5.6.370.0000.01414.36
5.6.360.0090.00614.12
5.6.350.0000.01014.38
5.6.340.0120.00314.09
5.6.330.0100.00714.43
5.6.320.0030.01014.27
5.6.310.0040.00814.10
5.6.300.0030.01014.00
5.6.290.0090.00614.26
5.6.280.0070.00714.20
5.6.270.0060.00614.29
5.6.260.0030.00914.34
5.6.250.0030.00914.01
5.6.240.0080.00413.90
5.6.230.0000.01514.01
5.6.220.0110.00014.27
5.6.210.0040.01114.20
5.6.200.0040.00813.79
5.6.190.0060.00313.88
5.6.180.0030.01014.34
5.6.170.0030.01014.11
5.6.160.0070.01014.00
5.6.150.0060.00613.80
5.6.140.0070.01013.95
5.6.130.0110.00414.25
5.6.120.0040.00714.17
5.6.110.0040.01114.11
5.6.100.0030.00913.97
5.6.90.0050.00514.10
5.6.80.0090.00313.82
5.6.70.0030.01313.81
5.6.60.0100.00313.91
5.6.50.0100.00314.07
5.6.40.0100.00613.89
5.6.30.0070.00713.90
5.6.20.0100.00314.04
5.6.10.0030.00913.91
5.6.00.0040.01113.96

preferences:
62.49 ms | 400 KiB | 5 Q