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; } $a = range(1, 2000000); next($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)
8.3.60.0030.01718.43
8.3.50.0140.00716.16
8.3.40.0070.00718.79
8.3.30.0140.00018.68
8.3.20.0050.00221.92
8.3.10.0000.00721.79
8.3.00.0080.00019.00
8.2.180.0150.00618.16
8.2.170.0090.00922.96
8.2.160.0070.00722.07
8.2.150.0040.00424.18
8.2.140.0070.00324.66
8.2.130.0060.00322.25
8.2.120.0070.00026.35
8.2.110.0060.00320.41
8.2.100.0090.00319.53
8.2.90.0000.00819.05
8.2.80.0040.00417.97
8.2.70.0060.00317.75
8.2.60.0060.00317.80
8.2.50.0040.00418.10
8.2.40.0030.00620.46
8.2.30.0070.00019.07
8.2.20.0070.00017.88
8.2.10.0000.00718.04
8.2.00.0040.00418.05
8.1.280.0130.00725.92
8.1.270.0080.00023.97
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0070.00323.91
8.1.230.0090.00317.52
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0060.00317.22
8.1.190.0080.00017.10
8.1.180.0080.00018.10
8.1.170.0000.00918.53
8.1.160.0030.00319.00
8.1.150.0050.00320.61
8.1.140.0000.00719.45
8.1.130.0000.00718.77
8.1.120.0040.00417.33
8.1.110.0030.00517.20
8.1.100.0040.00417.33
8.1.90.0060.00317.20
8.1.80.0000.00717.31
8.1.70.0030.00317.24
8.1.60.0030.00617.35
8.1.50.0000.00817.37
8.1.40.0000.00817.35
8.1.30.0040.00417.59
8.1.20.0000.00817.52
8.1.10.0000.00817.42
8.1.00.0040.00417.28
8.0.300.0040.00419.79
8.0.290.0000.00816.75
8.0.280.0030.00318.23
8.0.270.0030.00317.14
8.0.260.0000.00718.41
8.0.250.0030.00316.90
8.0.240.0040.00416.79
8.0.230.0040.00416.77
8.0.220.0060.00316.87
8.0.210.0000.00716.86
8.0.200.0050.00316.80
8.0.190.0080.00016.92
8.0.180.0000.00716.77
8.0.170.0030.00316.87
8.0.160.0040.00416.91
8.0.150.0070.00016.84
8.0.140.0040.00416.84
8.0.130.0030.00313.25
8.0.120.0000.00816.81
8.0.110.0030.00316.83
8.0.100.0030.00516.82
8.0.90.0030.00516.87
8.0.80.0100.01016.73
8.0.70.0070.00016.69
8.0.60.0000.00816.74
8.0.50.0040.00416.62
8.0.30.0120.00716.94
8.0.20.0120.00817.40
8.0.10.0050.00216.78
8.0.00.0080.00816.63
7.4.330.0000.00515.55
7.4.320.0000.00616.54
7.4.300.0030.00316.38
7.4.290.0000.01116.42
7.4.280.0050.00316.48
7.4.270.0030.00316.49
7.4.260.0000.00513.05
7.4.250.0040.00416.39
7.4.240.0000.00716.53
7.4.230.0000.00816.18
7.4.220.0110.00716.42
7.4.210.0090.00916.33
7.4.200.0000.00716.46
7.4.160.0100.00916.51
7.4.150.0140.00417.40
7.4.140.0090.00917.86
7.4.130.0040.01316.40
7.4.120.0140.00816.42
7.4.110.0060.01216.35
7.4.100.0170.00016.59
7.4.90.0090.00916.53
7.4.80.0110.00619.39
7.4.70.0100.01016.30
7.4.60.0080.00816.38
7.4.50.0030.01216.25
7.4.40.0060.01016.41
7.4.30.0030.01216.42
7.4.10.0110.00715.02
7.4.00.0050.01014.83
7.3.330.0000.00513.22
7.3.320.0000.00513.25
7.3.310.0070.00016.14
7.3.300.0000.00616.11
7.3.290.0040.01116.22
7.3.280.0090.00816.20
7.3.270.0090.00917.40
7.3.260.0110.00716.21
7.3.250.0100.00816.25
7.3.240.0090.01116.32
7.3.230.0130.00316.23
7.3.210.0030.01316.12
7.3.200.0030.01316.25
7.3.190.0120.00416.45
7.3.180.0150.00616.45
7.3.170.0000.01616.40
7.3.160.0030.01616.24
7.3.130.0070.01014.89
7.3.120.0030.01314.68
7.3.110.0110.00714.63
7.3.100.0040.01314.74
7.3.90.0060.01014.72
7.3.80.0030.01314.70
7.3.70.0090.00614.49
7.3.60.0070.00714.70
7.3.50.0030.00714.80
7.3.40.0030.01014.61
7.3.30.0040.00714.48
7.3.20.0070.00716.33
7.3.10.0070.00716.48
7.3.00.0090.00316.56
7.2.330.0150.00316.39
7.2.320.0120.01016.29
7.2.310.0130.01016.33
7.2.300.0130.00416.30
7.2.290.0100.00716.50
7.2.260.0110.00614.97
7.2.250.0030.01714.89
7.2.240.0070.00714.95
7.2.230.0110.00814.95
7.2.220.0040.01414.87
7.2.210.0060.00615.17
7.2.200.0110.00314.86
7.2.190.0060.00614.98
7.2.180.0030.01414.92
7.2.170.0060.00614.54
7.2.160.0030.00614.77
7.2.150.0070.01016.80
7.2.140.0000.00916.81
7.2.130.0050.01216.69
7.2.120.0030.00916.85
7.2.110.0100.00516.82
7.2.100.0070.00416.85
7.2.90.0090.00616.87
7.2.80.0050.01016.83
7.2.70.0040.00916.48
7.2.60.0120.00916.74
7.2.50.0060.00816.66
7.2.40.0050.00816.73
7.2.30.0070.00716.76
7.2.20.0120.00316.88
7.2.10.0050.01116.77
7.2.00.0040.00817.48
7.1.330.0070.00715.49
7.1.320.0130.00315.73
7.1.310.0060.00615.79
7.1.300.0090.00615.75
7.1.290.0060.00315.61
7.1.280.0130.00015.86
7.1.270.0100.00715.84
7.1.260.0000.00815.77
7.1.250.0060.00415.77
7.1.240.0040.00815.65
7.1.230.0040.00415.69
7.1.220.0060.00315.50
7.1.210.0030.01015.71
7.1.200.0030.00715.73
7.1.190.0080.00315.84
7.1.180.0060.00615.62
7.1.170.0100.00715.75
7.1.160.0060.00915.77
7.1.150.0080.00415.67
7.1.140.0060.00915.36
7.1.130.0000.01415.84
7.1.120.0000.00815.80
7.1.110.0060.00615.63
7.1.100.0060.00615.73
7.1.90.0070.00715.62
7.1.80.0050.00815.79
7.1.70.0040.00616.45
7.1.60.0290.00924.39
7.1.50.0270.01224.30
7.1.40.0250.00823.98
7.1.30.0220.01024.14
7.1.20.0350.01024.12
7.1.10.0200.01215.20
7.1.00.0180.01115.15
7.0.330.0040.01115.12
7.0.320.0000.00915.03
7.0.310.0080.00415.07
7.0.300.0070.00715.52
7.0.290.0050.00815.50
7.0.280.0070.00715.40
7.0.270.0040.01215.23
7.0.260.0070.00415.30
7.0.250.0030.00615.52
7.0.240.0000.01015.41
7.0.230.0100.00315.10
7.0.220.0070.00415.26
7.0.210.0060.00615.29
7.0.200.0180.00715.01
7.0.190.0200.00915.14
7.0.180.0190.00914.96
7.0.170.0180.01014.76
7.0.160.0220.01014.80
7.0.150.0290.01114.84
7.0.140.0190.01114.78
7.0.130.0250.00615.10
7.0.120.0270.00515.05
7.0.110.0250.00814.76
7.0.100.0300.00714.83
7.0.90.0210.00714.83
7.0.80.0340.01014.78
7.0.70.0220.00514.68
7.0.60.0650.01014.77
7.0.50.0200.01015.03
7.0.40.0220.00714.09
7.0.30.0220.01214.03
7.0.20.0250.00314.04
7.0.10.0230.01013.74
7.0.00.0200.01113.82
5.6.400.0040.00814.29
5.6.390.0040.01114.41
5.6.380.0110.00314.55
5.6.370.0130.00014.02
5.6.360.0060.00914.41
5.6.350.0040.00414.37
5.6.340.0060.00314.57
5.6.330.0040.00814.24
5.6.320.0070.00414.05
5.6.310.0080.00314.51
5.6.300.0100.00014.36
5.6.290.0030.00914.39
5.6.280.0030.01114.36
5.6.270.0070.00714.05
5.6.260.0070.01014.37
5.6.250.0110.00714.32
5.6.240.0060.00914.20
5.6.230.0040.00414.15
5.6.220.0080.00814.09
5.6.210.0000.01514.16
5.6.200.0060.01014.34
5.6.190.0040.00814.32
5.6.180.0070.00714.19
5.6.170.0030.01014.11
5.6.160.0060.00614.30
5.6.150.0050.00514.39
5.6.140.0110.00314.36
5.6.130.0070.00414.45
5.6.120.0040.00814.26
5.6.110.0100.00314.36
5.6.100.0030.01014.53
5.6.90.0000.01114.57
5.6.80.0000.01014.15
5.6.70.0030.00914.17
5.6.60.0060.00314.04
5.6.50.0000.01114.58
5.6.40.0040.01114.17
5.6.30.0040.00814.05
5.6.20.0000.01314.10
5.6.10.0040.00714.27
5.6.00.0090.00914.19

preferences:
52.97 ms | 400 KiB | 5 Q