3v4l.org

run code in 300+ PHP versions simultaneously
<?php $names = array('Anderson','Beresford','Donovan','Emerson','Graham'); $alphabet = array(); $previous_letter = ''; foreach($names as $value) { if($value[0] != $previous_letter) { $alphabet[] = $previous_letter = $value[0]; } } print_r($alphabet); ?>

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)
8.3.60.0100.01018.56
8.3.50.0070.01121.87
8.3.40.0090.00518.75
8.3.30.0070.00719.09
8.3.20.0000.00820.29
8.3.10.0000.00822.05
8.3.00.0040.00422.39
8.2.180.0110.00716.75
8.2.170.0110.01122.96
8.2.160.0100.00321.02
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0050.00326.16
8.2.120.0060.00319.25
8.2.110.0040.00422.07
8.2.100.0080.00417.84
8.2.90.0000.00917.97
8.2.80.0000.00819.11
8.2.70.0060.00318.05
8.2.60.0060.00317.63
8.2.50.0030.00517.50
8.2.40.0080.00017.63
8.2.30.0040.00417.81
8.2.20.0000.00817.68
8.2.10.0040.00419.59
8.2.00.0080.00017.62
8.1.280.0120.00625.92
8.1.270.0090.00922.14
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0040.00419.13
8.1.230.0040.00820.89
8.1.220.0080.00017.74
8.1.210.0080.00018.77
8.1.200.0070.00317.34
8.1.190.0060.00319.04
8.1.180.0030.00518.10
8.1.170.0050.00217.62
8.1.160.0000.00818.82
8.1.150.0020.00518.68
8.1.140.0040.00417.41
8.1.130.0070.00017.37
8.1.120.0030.00317.38
8.1.110.0080.00017.46
8.1.100.0000.00817.46
8.1.90.0000.00817.45
8.1.80.0000.00717.48
8.1.70.0030.00317.36
8.1.60.0050.00317.60
8.1.50.0000.00717.52
8.1.40.0080.00017.44
8.1.30.0050.00317.58
8.1.20.0050.00317.68
8.1.10.0000.00817.45
8.1.00.0000.00817.39
8.0.300.0060.00620.21
8.0.290.0050.00516.75
8.0.280.0000.00718.00
8.0.270.0030.00317.90
8.0.260.0030.00316.87
8.0.250.0030.00316.95
8.0.240.0030.00516.91
8.0.230.0000.00716.87
8.0.220.0030.00316.94
8.0.210.0030.00316.83
8.0.200.0000.00716.98
8.0.190.0040.00416.93
8.0.180.0000.00816.80
8.0.170.0040.00416.91
8.0.160.0040.00416.94
8.0.150.0000.00716.86
8.0.140.0050.00316.89
8.0.130.0060.00013.28
8.0.120.0040.00416.75
8.0.110.0000.00816.79
8.0.100.0040.00416.87
8.0.90.0040.00416.84
8.0.80.0110.00316.92
8.0.70.0020.00516.70
8.0.60.0040.00416.79
8.0.50.0040.00416.76
8.0.30.0100.01117.02
8.0.20.0090.00917.41
8.0.10.0030.00516.89
8.0.00.0100.00916.76
7.4.330.0030.00315.00
7.4.320.0030.00316.59
7.4.300.0060.00016.49
7.4.290.0040.00416.63
7.4.280.0040.00416.64
7.4.270.0050.00216.65
7.4.260.0080.00016.48
7.4.250.0040.00416.32
7.4.240.0040.00416.62
7.4.230.0040.00416.50
7.4.220.0000.00716.59
7.4.210.0090.00516.61
7.4.200.0070.00016.35
7.4.190.0040.00216.53
7.4.160.0060.01016.45
7.4.150.0110.00617.40
7.4.140.0070.01117.86
7.4.130.0090.00816.57
7.4.120.0070.01316.56
7.4.110.0090.00916.47
7.4.100.0030.01316.49
7.4.90.0110.01116.62
7.4.80.0110.00619.39
7.4.70.0000.01616.37
7.4.60.0130.00716.59
7.4.50.0030.00516.52
7.4.40.0040.01122.77
7.4.30.0030.01616.40
7.4.00.0060.00915.03
7.3.330.0000.00513.31
7.3.320.0050.00013.17
7.3.310.0000.00716.36
7.3.300.0040.00416.24
7.3.290.0110.00316.26
7.3.280.0070.00816.22
7.3.270.0110.00717.40
7.3.260.0130.01516.34
7.3.250.0110.00916.41
7.3.240.0070.01016.34
7.3.230.0030.01316.42
7.3.210.0030.01316.27
7.3.200.0160.00619.39
7.3.190.0120.00816.32
7.3.180.0180.00316.37
7.3.170.0100.01316.48
7.3.160.0090.00616.50
7.3.120.0060.01014.91
7.3.10.0030.00716.64
7.3.00.0070.00316.83
7.2.330.0110.00716.44
7.2.320.0100.00616.52
7.2.310.0110.01116.70
7.2.300.0160.00616.43
7.2.290.0030.01316.73
7.2.130.0070.00717.04
7.2.120.0110.00016.85
7.2.110.0030.00816.93
7.2.100.0000.01016.85
7.2.90.0080.00416.96
7.2.80.0030.00617.05
7.2.70.0040.00816.95
7.2.60.0030.00916.85
7.2.50.0030.00817.10
7.2.40.0000.00916.61
7.2.30.0060.01016.75
7.2.20.0000.01116.74
7.2.10.0000.01017.04
7.2.00.0050.01218.17
7.1.250.0000.00815.76
7.1.200.0030.00915.85
7.1.100.0030.01018.23
7.1.70.0030.00317.22
7.1.60.0110.01419.82
7.1.50.0070.01517.10
7.1.00.0100.06722.34
7.0.200.0000.00916.75
7.0.140.0070.07021.90
7.0.60.0370.06721.72
7.0.50.0130.07717.84
7.0.40.0070.05720.24
7.0.30.0330.07320.25
7.0.20.0230.05020.15
7.0.10.0030.04720.15
7.0.00.0100.08320.25
5.6.280.0070.07020.86
5.6.210.0100.04020.72
5.6.200.0000.04318.19
5.6.190.0070.04020.47
5.6.180.0200.05320.35
5.6.170.0300.07720.55
5.6.160.0130.08020.48
5.6.150.0170.04318.14
5.6.140.0100.04718.21
5.6.130.0000.09018.27
5.6.120.0030.04320.98
5.6.110.0000.04320.88
5.6.100.0130.04720.95
5.6.90.0100.07320.96
5.6.80.0000.04320.53
5.5.350.0300.07020.38
5.5.340.0070.08017.95
5.5.330.0070.07320.40
5.5.320.0300.07320.27
5.5.310.0230.04020.34
5.5.300.0130.04318.05
5.5.290.0030.05717.95
5.5.280.0170.06720.73
5.5.270.0130.06020.79
5.5.260.0030.04320.67
5.5.250.0070.08020.77
5.5.240.0370.06320.07
5.4.450.3570.04019.43
5.4.440.0000.07719.26
5.4.430.1230.03719.36
5.4.420.4400.04719.61
5.4.410.2770.04319.18
5.4.400.3670.04019.13
5.4.390.3670.03319.20
5.4.380.3870.03718.97
5.4.370.3670.03319.13
5.4.360.3400.04019.11
5.4.350.3870.03719.23
5.4.340.3270.04019.20
5.4.320.0130.07018.97
5.4.310.3400.03319.22
5.4.300.3230.03018.95
5.4.290.3730.03719.05
5.4.280.3730.03719.25
5.4.270.3730.03019.22
5.4.260.3970.03719.12
5.4.250.4000.04019.05
5.4.240.3530.04019.21
5.4.230.4030.03719.14
5.4.220.3970.04719.09
5.4.210.3470.03719.04
5.4.200.2570.03319.19
5.4.190.2730.03718.93
5.4.180.2570.04018.92
5.4.170.3530.04018.92
5.4.160.2830.03318.96
5.4.150.2630.03719.04
5.4.140.3030.04016.39
5.4.130.3230.03716.50
5.4.120.3330.04316.37
5.4.110.3670.03716.47
5.4.100.4400.03716.51
5.4.90.4100.03316.33
5.4.80.3370.03716.46
5.4.70.3870.03716.47
5.4.60.4070.03316.20
5.4.50.4030.03716.45
5.4.40.3470.03316.53
5.4.30.3700.03016.23
5.4.20.3800.03716.41
5.4.10.3700.04316.50
5.4.00.3530.03015.88
5.3.290.1830.04314.67
5.3.280.3900.04314.50
5.3.270.3870.03714.53
5.3.260.3900.03314.55
5.3.250.3030.03714.66
5.3.240.2600.03314.53
5.3.230.3330.04314.60
5.3.220.2630.03314.71
5.3.210.2730.03714.59
5.3.200.3770.03714.60
5.3.190.3300.04314.56
5.3.180.5400.03714.64
5.3.170.3470.04014.56
5.3.160.3570.04314.55
5.3.150.3900.04014.70
5.3.140.4000.03714.55
5.3.130.3800.04314.54
5.3.120.3670.03314.56
5.3.110.3930.03714.43
5.3.100.3930.04314.08
5.3.90.3830.02714.04
5.3.80.3930.03314.16
5.3.70.3400.04014.05
5.3.60.4030.03314.05
5.3.50.3270.03713.96
5.3.40.3630.03713.95
5.3.30.4100.02713.90
5.3.20.3730.03313.69
5.3.10.3500.03313.57
5.3.00.4030.03313.65
5.2.170.3030.03311.09
5.2.160.3430.03011.18
5.2.150.3230.02311.20
5.2.140.3200.03011.16
5.2.130.3270.02711.10
5.2.120.3330.02711.26
5.2.110.2300.03011.09
5.2.100.3030.02711.16
5.2.90.3430.02711.15
5.2.80.3270.02310.98
5.2.70.3270.02711.09
5.2.60.3070.02711.05
5.2.50.3330.02711.05
5.2.40.3300.02711.04
5.2.30.2130.03311.03
5.2.20.2900.02710.95
5.2.10.3230.02710.77
5.2.00.3170.02710.66
5.1.60.3170.02710.07
5.1.50.2530.0239.89
5.1.40.2630.0239.82
5.1.30.2900.02310.32
5.1.20.2630.02310.20
5.1.10.2700.02710.13
5.1.00.2470.02710.08
5.0.50.1270.0208.62
5.0.40.1230.0208.47
5.0.30.1230.0438.21
5.0.20.1500.0278.10
5.0.10.1530.0208.10
5.0.00.1200.0308.21
4.4.90.1400.0175.88
4.4.80.1200.0205.76
4.4.70.1630.0105.88
4.4.60.1700.0205.81
4.4.50.1430.0175.90
4.4.40.1370.0205.89
4.4.30.1470.0175.80
4.4.20.1230.0135.82
4.4.10.1370.0135.95
4.4.00.1500.0235.87
4.3.110.1000.0105.76
4.3.100.1200.0175.71
4.3.90.1270.0175.72
4.3.80.1630.0235.75
4.3.70.1100.0235.67
4.3.60.1530.0105.75
4.3.50.1500.0205.74
4.3.40.1230.0305.71
4.3.30.0770.0234.72
4.3.20.0530.0274.72
4.3.10.0700.0234.72
4.3.00.0670.0234.72

preferences:
49.31 ms | 401 KiB | 5 Q