3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (PHP_VERSION !== '7.1.6') die('Meh'); function kv(& $a) { $b = $a; end($b); $kv = [$k = key($b), current($b)]; // unset($b); // TRICKY: We must unset $b before modifying $a to avoid copy-on-write for $a. unset($a[$k]); return $kv; } $a = range(1, 500000); next($a); next($a); echo current($a) . PHP_EOL; var_dump($a); var_dump(kv($a)); echo current($a) . PHP_EOL; var_dump($a);

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)
8.3.60.0170.00318.18
8.3.50.0000.01516.47
8.3.40.0150.00018.85
8.3.30.0070.00718.71
8.3.20.0050.00221.89
8.3.10.0040.00421.78
8.3.00.0000.00818.98
8.2.180.0090.01218.27
8.2.170.0120.00822.96
8.2.160.0040.01122.21
8.2.150.0030.00624.18
8.2.140.0060.00324.66
8.2.130.0000.00722.26
8.2.120.0040.00426.35
8.2.110.0060.00320.35
8.2.100.0090.00317.72
8.2.90.0000.00819.23
8.2.80.0000.00817.97
8.2.70.0030.00517.63
8.2.60.0000.00818.04
8.2.50.0030.00618.10
8.2.40.0040.00420.61
8.2.30.0040.00419.08
8.2.20.0000.00718.00
8.2.10.0040.00417.97
8.2.00.0000.00817.99
8.1.280.0170.00325.92
8.1.270.0040.00423.97
8.1.260.0050.00326.35
8.1.250.0000.00828.09
8.1.240.0090.00023.83
8.1.230.0060.00617.77
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0080.00017.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0090.00018.48
8.1.160.0000.00718.88
8.1.150.0080.00020.61
8.1.140.0040.00419.50
8.1.130.0050.00218.77
8.1.120.0000.00717.36
8.1.110.0040.00417.30
8.1.100.0050.00317.28
8.1.90.0030.00517.26
8.1.80.0000.00717.32
8.1.70.0000.00717.38
8.1.60.0000.00817.47
8.1.50.0040.00417.50
8.1.40.0080.00017.47
8.1.30.0030.00617.49
8.1.20.0040.00417.49
8.1.10.0000.00717.47
8.1.00.0040.00417.24
8.0.300.0040.00420.02
8.0.290.0000.00816.63
8.0.280.0030.00318.33
8.0.270.0030.00517.04
8.0.260.0070.00018.46
8.0.250.0030.00316.82
8.0.240.0030.00516.85
8.0.230.0030.00516.79
8.0.220.0000.00716.87
8.0.210.0050.00216.74
8.0.200.0040.00416.79
8.0.190.0050.00316.80
8.0.180.0000.00716.91
8.0.170.0030.00316.74
8.0.160.0000.00716.84
8.0.150.0020.00516.75
8.0.140.0040.00416.68
8.0.130.0030.00313.30
8.0.120.0000.00816.80
8.0.110.0020.00516.85
8.0.100.0000.00816.69
8.0.90.0000.00716.72
8.0.80.0130.00316.82
8.0.70.0000.00816.73
8.0.60.0080.00016.71
8.0.50.0040.00416.90
8.0.30.0080.01017.15
8.0.20.0120.00917.40
8.0.10.0000.00816.99
8.0.00.0030.01316.68
7.4.330.0030.00315.55
7.4.320.0000.00616.51
7.4.300.0000.00616.36
7.4.290.0110.00016.40
7.4.280.0000.00816.49
7.4.270.0000.00716.36
7.4.260.0060.00013.17
7.4.250.0000.00716.41
7.4.240.0030.00316.46
7.4.230.0070.00016.44
7.4.220.0120.00616.48
7.4.210.0100.00716.55
7.4.200.0030.00416.55
7.4.160.0070.01016.33
7.4.150.0080.00917.40
7.4.140.0100.00717.86
7.4.130.0000.02116.49
7.4.120.0130.00916.27
7.4.110.0060.01116.53
7.4.100.0070.01116.26
7.4.90.0130.01016.66
7.4.80.0070.01419.39
7.4.70.0090.00616.36
7.4.60.0050.01116.62
7.4.50.0030.01416.27
7.4.40.0110.00516.23
7.4.30.0000.01516.22
7.4.00.0060.00915.14
7.3.330.0030.00313.22
7.3.320.0000.00513.25
7.3.310.0070.00016.36
7.3.300.0000.00716.29
7.3.290.0090.00616.27
7.3.280.0100.00616.23
7.3.270.0030.01417.40
7.3.260.0070.00916.29
7.3.250.0100.01216.45
7.3.240.0090.00916.45
7.3.230.0030.01716.26
7.3.210.0090.00916.32
7.3.200.0070.01016.32
7.3.190.0100.00616.42
7.3.180.0100.00716.24
7.3.170.0110.00616.32
7.3.160.0120.00616.35
7.3.120.0080.00614.64
7.3.110.0070.01014.77
7.3.100.0030.00714.68
7.3.90.0030.01414.71
7.3.80.0070.01014.48
7.3.70.0040.00714.77
7.3.60.0060.00914.45
7.3.50.0040.00814.75
7.3.40.0000.01114.64
7.3.30.0070.01014.76
7.3.20.0110.00716.62
7.3.10.0060.00316.68
7.3.00.0000.01616.53
7.2.330.0170.00016.37
7.2.320.0120.00616.60
7.2.310.0130.01016.36
7.2.300.0080.00816.38
7.2.290.0060.01516.42
7.2.240.0040.01115.00
7.2.230.0070.01015.07
7.2.220.0100.00614.83
7.2.210.0110.00414.92
7.2.200.0070.01015.04
7.2.190.0120.00614.83
7.2.180.0120.00614.73
7.2.170.0060.00915.05
7.2.160.0040.01215.07
7.2.150.0120.00316.85
7.2.140.0090.00616.83
7.2.130.0070.01016.81
7.2.120.0030.00916.81
7.2.110.0040.01116.73
7.2.100.0110.00316.58
7.2.90.0040.01416.64
7.2.80.0060.00916.75
7.2.70.0000.01616.81
7.2.60.0140.00716.68
7.2.50.0040.00816.73
7.2.40.0070.01016.64
7.2.30.0000.01116.56
7.2.20.0140.00316.77
7.2.10.0030.00916.75
7.2.00.0040.00817.90
7.1.330.0100.00315.61
7.1.320.0060.00615.59
7.1.310.0030.00715.83
7.1.300.0070.00715.69
7.1.290.0100.00615.89
7.1.280.0000.01415.32
7.1.270.0000.01215.75
7.1.260.0060.00815.69
7.1.250.0100.00315.86
7.1.200.0040.01115.62
7.1.70.0030.00317.03
7.1.60.4530.02348.70
7.1.50.0770.01032.57
7.1.40.0630.01032.62
7.1.30.0830.00732.57
7.1.20.0870.01732.62
7.1.10.0500.00714.51
7.1.00.0800.01314.90
7.0.200.0770.00315.00
7.0.190.0530.01014.75
7.0.180.0400.01314.32
7.0.170.0830.01014.20
7.0.160.0470.01014.26
7.0.150.0530.01314.25
7.0.140.1100.01014.40
7.0.130.0830.01314.65
7.0.120.0500.00714.56
7.0.110.0830.01014.45
7.0.100.0570.00714.43
7.0.90.0700.01014.43
7.0.80.0600.01014.36
7.0.70.0500.00714.45
7.0.60.0500.01314.27
7.0.50.0530.01014.43
7.0.40.0600.01014.60
7.0.30.0500.00714.43
7.0.20.1100.01014.38
7.0.10.0900.01314.39
7.0.00.1070.01314.40

preferences:
56.12 ms | 400 KiB | 5 Q