3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tests = ['âa', 'Bbbbb', 'Éé', 'iou', 'Δδ']; foreach ($tests as $test) { echo "\n{$test}:"; echo "\n\tPREG: " , preg_match('~^\p{Lu}~u', $test) ? 'upper' : 'lower'; echo "\n\tCTYPE: " , ctype_upper(mb_substr($test, 0, 1)) ? 'upper' : 'lower'; echo "\n\t< a: " , mb_substr($test, 0, 1) < 'a' ? 'upper' : 'lower'; $chr = mb_substr ($test, 0, 1, "UTF-8"); echo "\n\tMB: " , mb_strtoupper($chr, "UTF-8") == $chr ? 'upper' : 'lower'; }

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)
8.4.120.0050.00424.07
8.4.110.0110.00918.74
8.4.100.0110.01118.71
8.4.90.0150.00620.81
8.4.80.0110.00620.01
8.4.70.0140.00717.88
8.4.60.0040.00418.91
8.4.50.0140.00619.94
8.4.40.0140.00719.57
8.4.30.0110.00722.42
8.4.20.0100.00719.01
8.4.10.0060.00319.48
8.3.250.0110.00817.13
8.3.240.0040.00517.17
8.3.230.0060.00416.60
8.3.220.0140.00517.14
8.3.210.0080.00718.52
8.3.200.0040.00416.88
8.3.190.0110.01018.71
8.3.180.0110.00718.84
8.3.170.0150.00316.89
8.3.160.0120.00618.68
8.3.150.0120.00616.73
8.3.140.0100.01018.49
8.3.130.0040.00418.49
8.3.120.0110.00019.05
8.3.110.0080.00320.94
8.3.100.0040.00424.06
8.3.90.0030.00626.77
8.3.80.0060.00317.97
8.3.70.0160.00618.56
8.3.60.0060.01518.55
8.3.50.0280.00722.12
8.3.40.0120.00319.10
8.3.30.0040.01118.92
8.3.20.0040.00421.87
8.3.10.0030.00620.33
8.3.00.0030.00623.70
8.2.290.0070.00820.55
8.2.280.0050.00418.49
8.2.270.0100.00017.12
8.2.260.0100.01016.82
8.2.250.0080.00018.74
8.2.240.0060.01217.21
8.2.230.0090.00022.58
8.2.220.0030.00637.54
8.2.210.0070.00726.77
8.2.200.0000.00918.66
8.2.190.0120.00618.54
8.2.180.0190.00318.79
8.2.170.0140.00719.13
8.2.160.0080.00522.96
8.2.150.0040.00425.66
8.2.140.0040.00424.66
8.2.130.0000.00926.16
8.2.120.0100.00021.17
8.2.110.0100.00022.16
8.2.100.0120.00018.16
8.2.90.0000.00820.54
8.2.80.0030.00620.41
8.2.70.0040.00417.88
8.2.60.0060.00317.88
8.2.50.0030.00617.75
8.2.40.0070.00318.00
8.2.30.0030.00518.07
8.2.20.0040.00418.16
8.2.10.0050.00219.44
8.2.00.0030.00619.45
8.1.330.0150.00516.36
8.1.320.0110.00816.28
8.1.310.0000.00918.71
8.1.300.0090.00020.07
8.1.290.0050.00530.84
8.1.280.0200.00025.92
8.1.270.0060.00320.64
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00319.32
8.1.230.0070.00720.91
8.1.220.0040.00417.78
8.1.210.0040.00418.97
8.1.200.0060.00317.48
8.1.190.0040.00417.48
8.1.180.0030.00518.10
8.1.170.0040.00417.62
8.1.160.0070.00318.97
8.1.150.0040.00419.11
8.1.140.0040.00419.15
8.1.130.0070.00017.69
8.1.120.0040.00417.69
8.1.110.0030.00517.68
8.1.100.0050.00317.71
8.1.90.0000.00717.72
8.1.80.0000.00717.68
8.1.70.0000.00917.66
8.1.60.0080.00017.81
8.1.50.0000.00817.73
8.1.40.0040.00417.75
8.1.30.0030.00517.87
8.1.20.0060.00317.75
8.1.10.0080.00017.61
8.1.00.0040.00417.67
8.0.300.0040.00420.07
8.0.290.0040.00417.00
8.0.280.0050.00218.43
8.0.270.0070.00017.25
8.0.260.0070.00017.11
8.0.250.0000.00717.29
8.0.240.0030.00317.22
8.0.230.0000.00717.21
8.0.220.0070.00017.26
8.0.210.0040.00417.28
8.0.200.0090.00017.27
8.0.190.0030.00317.30
8.0.180.0000.00817.26
8.0.170.0060.00317.06
8.0.160.0050.00517.20
8.0.150.0000.00717.10
8.0.140.0070.00017.14
8.0.130.0060.00013.59
8.0.120.0030.00517.13
8.0.110.0000.00817.11
8.0.100.0030.00517.06
8.0.90.0060.00317.25
8.0.80.0120.00417.19
8.0.70.0000.00717.16
8.0.60.0000.00717.28
8.0.50.0040.00417.28
8.0.30.0070.01217.29
8.0.20.0140.00717.27
8.0.10.0110.01417.18
8.0.00.0110.01017.06
7.4.330.0000.00615.55
7.4.320.0060.00016.93
7.4.300.0030.00316.82
7.4.290.0070.00016.70
7.4.280.0040.00416.82
7.4.270.0070.00016.86
7.4.260.0000.00716.77
7.4.250.0000.00716.79
7.4.240.0020.00616.88
7.4.230.0030.00416.77
7.4.220.0040.00417.00
7.4.210.0060.01216.87
7.4.200.0030.00316.88
7.4.160.0160.00317.00
7.4.150.0170.00316.86
7.4.140.0120.01316.90
7.4.130.0130.01116.87
7.4.120.0120.01216.75
7.4.110.0170.00816.59
7.4.100.0120.01216.67
7.4.90.0110.01116.83
7.4.80.0160.00717.49
7.4.70.0150.00816.74
7.4.60.0140.01016.72
7.4.50.0130.01016.79
7.4.40.0120.00916.72
7.4.30.0130.00916.79
7.4.20.0150.00916.79
7.4.10.0090.01116.41
7.4.00.0100.00816.37
7.3.330.0020.00313.53
7.3.320.0000.00613.39
7.3.310.0000.00716.80
7.3.300.0000.00716.57
7.3.290.0030.00316.68
7.3.280.0170.00316.61
7.3.270.0190.00416.71
7.3.260.0110.00916.62
7.3.250.0190.00616.63
7.3.240.0110.00916.65
7.3.230.0180.01016.65
7.3.220.0140.01116.61
7.3.210.0180.00516.72
7.3.200.0150.00716.57
7.3.190.0160.00816.65
7.3.180.0130.01216.59
7.3.170.0150.01016.59
7.3.160.0110.01016.60
7.3.150.0100.01216.67
7.3.140.0150.00716.63
7.3.130.0150.00616.41
7.3.120.0140.00716.27
7.3.110.0120.00816.32
7.3.100.0120.00916.06
7.3.90.0120.00815.99
7.3.80.0100.01116.02
7.3.70.0100.01016.06
7.3.60.0100.01215.86
7.3.50.0120.00815.91
7.3.40.0110.01015.90
7.3.30.0080.01215.91
7.3.20.0130.00815.88
7.3.10.0200.01015.95
7.3.00.0090.01015.91
7.2.340.0230.01016.79
7.2.330.0160.01116.85
7.2.320.0150.01016.76
7.2.310.0170.01016.81
7.2.300.0170.00716.73
7.2.290.0160.00716.81
7.2.280.0150.00816.81
7.2.270.0130.01216.78
7.2.260.0140.00916.47
7.2.250.0130.01116.48
7.2.240.0110.01116.47
7.2.230.0110.01116.31
7.2.220.0110.01016.18
7.2.210.0140.00916.25
7.2.200.0120.00816.22
7.2.190.0130.01016.08
7.2.180.0110.01016.03
7.2.170.0120.00916.09
7.2.160.0120.01015.97
7.2.150.0130.01116.15
7.2.140.0140.00916.13
7.2.130.0130.00916.12
7.2.120.0130.00916.16
7.2.110.0120.01016.14
7.2.100.0130.01016.11
7.2.90.0130.00916.16
7.2.80.0120.00816.12
7.2.70.0160.01016.18
7.2.60.0250.01016.21
7.2.50.0100.00916.13
7.2.40.0170.00916.15
7.2.30.0130.00916.20
7.2.20.0160.00616.13
7.2.10.0130.00816.21
7.2.00.0130.00816.17
7.1.330.0210.01015.55
7.1.320.0170.00815.14
7.1.310.0170.00915.24
7.1.300.0180.00715.00
7.1.290.0480.00914.96
7.1.280.0160.00915.12
7.1.270.0170.00715.04
7.1.260.0150.00914.96
7.1.250.0160.00815.01
7.1.240.0150.00915.30
7.1.230.0150.01015.21
7.1.220.0180.00815.29
7.1.210.0200.00915.31
7.1.200.0170.00915.21
7.1.190.0180.00715.31
7.1.180.0180.00615.17
7.1.170.0170.00915.25
7.1.160.0160.00915.30
7.1.150.0160.01015.27
7.1.140.0140.00915.26
7.1.130.0170.00615.28
7.1.120.0170.00715.21
7.1.110.0180.01115.22
7.1.100.0160.01015.35
7.1.90.0200.00715.27
7.1.80.0190.00715.32
7.1.70.0140.01115.31
7.1.60.0190.01015.23
7.1.50.0180.01215.33
7.1.40.0260.01015.24
7.1.30.0170.01015.31
7.1.20.0240.01015.28
7.1.10.0360.00715.28
7.1.00.0170.00615.26

preferences:
130.63 ms | 403 KiB | 5 Q