3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'Opt Out'; echo strtolower($str);

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)
8.3.60.0070.01416.50
8.3.50.0100.01418.04
8.3.40.0110.00418.67
8.3.30.0040.01118.46
8.3.20.0120.00620.17
8.3.10.0090.00020.91
8.3.00.0070.01122.05
8.2.180.0070.01418.17
8.2.170.0000.01422.96
8.2.160.0110.00420.52
8.2.150.0120.00624.18
8.2.140.0060.00324.66
8.2.130.0150.00321.06
8.2.120.0090.00926.35
8.2.110.0030.00720.88
8.2.100.0000.01217.78
8.2.90.0000.00819.57
8.2.80.0060.00617.97
8.2.70.0080.00017.50
8.2.60.0040.00417.80
8.2.50.0000.00818.07
8.2.40.0040.00418.09
8.2.30.0060.00317.96
8.2.20.0040.00418.09
8.2.10.0070.00017.96
8.2.00.0000.00717.86
8.1.280.0100.00725.92
8.1.270.0110.00722.11
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0090.00022.42
8.1.230.0000.01122.11
8.1.220.0050.00317.79
8.1.210.0030.00518.88
8.1.200.0030.00617.23
8.1.190.0060.00317.22
8.1.180.0040.00418.10
8.1.170.0000.01018.46
8.1.160.0050.00218.82
8.1.150.0030.00522.05
8.1.140.0020.00519.46
8.1.130.0080.00018.77
8.1.120.0030.00717.30
8.1.110.0050.00217.34
8.1.100.0070.00017.42
8.1.90.0040.00417.35
8.1.80.0000.00817.41
8.1.70.0000.00817.28
8.1.60.0030.00517.54
8.1.50.0030.00617.47
8.1.40.0000.00817.34
8.1.30.0000.00817.40
8.1.20.0060.00317.54
8.1.10.0060.00317.50
8.1.00.0000.00717.46
8.0.300.0000.00719.86
8.0.290.0060.00316.73
8.0.280.0030.00318.43
8.0.270.0000.00717.15
8.0.260.0030.00318.90
8.0.250.0070.00016.89
8.0.240.0030.00317.00
8.0.230.0070.00716.78
8.0.220.0040.00416.73
8.0.210.0040.00416.85
8.0.200.0000.00716.75
8.0.190.0000.00716.88
8.0.180.0000.00816.83
8.0.170.0060.00616.84
8.0.160.0040.00416.92
8.0.150.0000.00716.76
8.0.140.0000.00816.82
8.0.130.0000.00713.24
8.0.120.0030.00616.66
8.0.110.0050.00316.72
8.0.100.0040.00416.84
8.0.90.0080.00016.78
8.0.80.0090.00616.84
8.0.70.0000.00716.72
8.0.60.0050.00316.64
8.0.50.0000.00816.63
8.0.30.0080.01117.00
8.0.20.0120.00717.40
8.0.10.0000.00716.73
8.0.00.0150.00616.55
7.4.330.0030.00315.55
7.4.320.0000.00716.39
7.4.300.0000.00616.34
7.4.290.0030.00316.43
7.4.280.0040.00416.43
7.4.270.0030.00616.58
7.4.260.0000.00916.40
7.4.250.0000.00816.39
7.4.240.0040.00416.54
7.4.230.0000.00816.31
7.4.220.0060.01316.41
7.4.210.0090.00616.46
7.4.200.0030.00516.35
7.4.160.0050.01116.40
7.4.150.0130.00617.40
7.4.140.0140.00917.86
7.4.130.0120.00616.47
7.4.120.0080.01316.43
7.4.110.0090.00916.42
7.4.100.0080.00816.43
7.4.90.0160.00016.50
7.4.80.0150.00619.39
7.4.70.0140.00316.38
7.4.60.0140.00416.32
7.4.50.0030.01216.38
7.4.40.0090.00916.33
7.4.30.0070.01116.38
7.4.00.0070.00714.64
7.3.330.0000.00613.03
7.3.320.0030.00312.93
7.3.310.0000.00716.26
7.3.300.0030.00316.15
7.3.290.0080.00616.11
7.3.280.0100.00716.12
7.3.270.0100.00617.40
7.3.260.0110.00716.30
7.3.250.0100.01016.42
7.3.240.0090.00816.30
7.3.230.0030.01216.38
7.3.210.0120.00616.52
7.3.200.0150.00616.03
7.3.190.0080.00716.27
7.3.180.0060.01016.14
7.3.170.0090.01216.31
7.3.160.0090.00916.07
7.3.10.0100.00616.30
7.3.00.0120.00416.34
7.2.330.0070.01016.19
7.2.320.0150.00916.33
7.2.310.0160.00016.39
7.2.300.0130.01016.53
7.2.290.0130.00316.57
7.2.130.0110.00716.11
7.2.120.0060.01116.36
7.2.110.0140.00616.61
7.2.100.0000.01516.71
7.2.90.0130.00816.39
7.2.80.0050.00816.53
7.2.70.0100.01016.40
7.2.60.0130.00616.62
7.2.50.0080.00916.44
7.2.40.0070.00816.26
7.2.30.0150.00516.15
7.2.20.0140.00716.36
7.2.10.0090.00416.69
7.2.00.0100.00816.38
7.1.250.0070.00815.53
7.1.200.0090.00015.45
7.1.80.0130.00916.30
7.1.70.0150.00615.17
7.1.60.0300.01133.26
7.1.50.0250.00832.61
7.1.40.0190.01632.46
7.1.30.0260.00732.52
7.1.20.0240.01232.54
7.1.10.0150.00914.47
7.1.00.0200.01414.60
7.0.200.0140.00714.97
7.0.190.0090.01214.77
7.0.180.0140.00814.56
7.0.170.0140.00714.23
7.0.160.0150.00614.31
7.0.150.0200.00514.56
7.0.140.0160.00914.49
7.0.130.0120.00914.68
7.0.120.0110.01914.55
7.0.110.0150.00714.59
7.0.100.0160.01014.49
7.0.90.0230.00314.37
7.0.80.0110.01114.37
7.0.70.0110.01114.36
7.0.60.0200.00914.14
7.0.50.0140.00714.58
7.0.40.0530.01014.54
7.0.30.0180.01114.56
7.0.20.0140.00714.75
7.0.10.0140.01014.63
7.0.00.0070.01414.49

preferences:
55.51 ms | 400 KiB | 5 Q