3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ 1 => ["key" => "a"], 2 => ["key" => "b"] ]; foreach ($arr as $key => $val) { $arr[$val["key"]] = $val; unset($arr[$key]); } var_dump($arr);

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)
8.3.60.0120.00618.15
8.3.50.0100.01016.25
8.3.40.0100.00718.68
8.3.30.0100.01018.62
8.3.20.0070.00420.39
8.3.10.0050.00223.61
8.3.00.0060.00322.43
8.2.180.0110.00718.18
8.2.170.0120.00322.96
8.2.160.0070.01120.39
8.2.150.0060.00324.18
8.2.140.0090.00024.66
8.2.130.0000.00726.16
8.2.120.0030.00517.63
8.2.110.0070.01120.32
8.2.100.0040.00817.63
8.2.90.0050.00219.18
8.2.80.0040.00417.97
8.2.70.0050.00317.50
8.2.60.0080.00017.80
8.2.50.0030.00518.07
8.2.40.0040.00421.12
8.2.30.0000.00718.00
8.2.20.0040.00417.66
8.2.10.0000.00818.02
8.2.00.0000.00818.11
8.1.280.0110.01125.92
8.1.270.0040.00420.38
8.1.260.0030.00626.35
8.1.250.0040.00428.09
8.1.240.0060.00320.87
8.1.230.0090.00317.42
8.1.220.0080.00017.74
8.1.210.0100.00018.77
8.1.200.0060.00617.47
8.1.190.0050.00317.35
8.1.180.0000.00818.10
8.1.170.0030.00618.64
8.1.160.0070.00022.02
8.1.150.0000.00718.84
8.1.140.0030.00517.48
8.1.130.0030.00317.69
8.1.120.0000.00717.41
8.1.110.0000.00817.35
8.1.100.0030.00617.42
8.1.90.0000.00817.50
8.1.80.0040.00417.47
8.1.70.0030.00317.44
8.1.60.0060.00317.54
8.1.50.0000.00817.45
8.1.40.0000.00717.54
8.1.30.0000.00817.55
8.1.20.0000.00817.64
8.1.10.0040.00317.53
8.1.00.0040.00417.44
8.0.300.0000.00818.77
8.0.290.0060.00316.63
8.0.280.0000.00718.43
8.0.270.0030.00317.29
8.0.260.0030.00317.24
8.0.250.0030.00516.86
8.0.240.0040.00416.84
8.0.230.0000.00716.79
8.0.220.0040.00416.84
8.0.210.0070.00016.93
8.0.200.0000.00716.86
8.0.190.0040.00417.01
8.0.180.0050.00216.79
8.0.170.0080.00016.91
8.0.160.0040.00416.85
8.0.150.0040.00416.67
8.0.140.0040.00416.86
8.0.130.0030.00313.34
8.0.120.0000.00816.89
8.0.110.0000.00716.77
8.0.100.0040.00416.84
8.0.90.0070.00016.95
8.0.80.0030.01216.93
8.0.70.0080.00016.71
8.0.60.0000.00916.71
8.0.50.0080.00016.70
8.0.30.0090.00817.06
8.0.20.0150.00317.40
8.0.10.0040.00416.89
8.0.00.0140.00616.65
7.4.330.0000.00515.12
7.4.320.0060.00016.59
7.4.300.0030.00316.61
7.4.290.0070.00016.55
7.4.280.0040.00416.47
7.4.270.0000.00816.53
7.4.260.0030.00316.48
7.4.250.0030.00516.51
7.4.240.0030.00516.50
7.4.230.0050.00216.59
7.4.220.0140.00616.59
7.4.210.0110.00316.41
7.4.200.0000.00716.60
7.4.160.0060.00916.51
7.4.150.0090.00917.40
7.4.140.0080.01217.86
7.4.130.0080.00916.41
7.4.120.0080.01516.44
7.4.110.0080.00816.59
7.4.100.0100.01116.59
7.4.90.0110.00716.57
7.4.80.0120.01019.39
7.4.70.0060.01516.39
7.4.60.0050.01116.36
7.4.50.0030.00516.63
7.4.40.0090.00916.36
7.4.30.0060.01016.57
7.4.10.0060.01114.92
7.4.00.0080.00814.89
7.3.330.0000.00513.24
7.3.320.0030.00313.25
7.3.310.0030.00316.17
7.3.300.0040.00416.29
7.3.290.0050.01016.32
7.3.280.0090.00716.28
7.3.270.0110.00717.40
7.3.260.0150.00916.61
7.3.250.0110.00916.32
7.3.240.0090.00916.48
7.3.230.0140.00816.39
7.3.210.0030.01216.33
7.3.200.0110.00619.39
7.3.190.0310.01616.61
7.3.180.0110.00716.28
7.3.170.0070.01316.43
7.3.160.0070.01116.23
7.3.130.0100.00714.87
7.3.120.0050.01414.97
7.3.110.0070.01014.88
7.3.100.0050.00914.60
7.3.90.0030.01414.77
7.3.80.0050.00914.87
7.3.70.0050.01014.79
7.3.60.0040.00814.80
7.3.50.0030.00914.92
7.3.40.0070.00714.76
7.3.30.0040.00814.83
7.3.20.0080.00716.65
7.3.10.0090.00616.73
7.3.00.0070.00716.79
7.2.330.0120.01216.75
7.2.320.0100.01416.75
7.2.310.0110.00516.56
7.2.300.0070.01816.46
7.2.290.0120.00616.72
7.2.260.0050.01414.81
7.2.250.0060.01214.98
7.2.240.0070.00815.15
7.2.230.0040.01015.00
7.2.220.0040.01015.02
7.2.210.0080.00715.12
7.2.200.0030.01015.05
7.2.190.0070.00715.04
7.2.180.0040.00815.02
7.2.170.0060.00815.05
7.2.160.0060.00715.04
7.2.150.0050.00816.79
7.2.140.0030.01217.01
7.2.130.0110.00317.00
7.2.120.0100.00616.85
7.2.110.0110.00516.75
7.2.100.0060.00616.97
7.2.90.0050.00917.13
7.2.80.0050.01016.83
7.2.70.0050.00717.08
7.2.60.0070.00816.90
7.2.50.0090.00616.91
7.2.40.0120.00416.83
7.2.30.0100.00817.04
7.2.20.0050.00717.02
7.2.10.0070.00816.81
7.2.00.0050.00917.59
7.1.330.0040.00915.92
7.1.320.0110.00615.84
7.1.310.0020.01215.96
7.1.300.0050.00815.89
7.1.290.0060.00715.70
7.1.280.0060.00415.82
7.1.270.0030.01215.63
7.1.260.0050.01015.70
7.1.250.0060.00715.67
7.1.240.0060.00815.82
7.1.230.0090.00415.82
7.1.220.0030.01115.84
7.1.210.0070.00515.82
7.1.200.0040.01115.82
7.1.190.0030.00815.77
7.1.180.0020.00915.62
7.1.170.0020.01115.63
7.1.160.0060.00615.86
7.1.150.0030.00915.80
7.1.140.0080.00415.84
7.1.130.0040.00815.62
7.1.120.0070.00715.68
7.1.110.0080.00515.81
7.1.100.0040.00816.74
7.1.90.0040.00615.80
7.1.80.0030.00915.90
7.1.70.0020.01016.23
7.1.60.0090.00817.14
7.1.50.0090.00316.01
7.1.40.0050.00615.84
7.1.30.0060.00615.73
7.1.20.0050.01115.90
7.1.10.0060.00915.76
7.1.00.0090.02617.91
7.0.330.0040.01015.30
7.0.320.0070.00515.44
7.0.310.0020.01115.43
7.0.300.0080.00215.46
7.0.290.0090.00815.24
7.0.280.0050.00815.25
7.0.270.0070.00515.42
7.0.260.0060.00815.30
7.0.250.0050.00815.49
7.0.240.0050.00915.38
7.0.230.0030.01115.39
7.0.220.0070.00815.34
7.0.210.0070.00515.44
7.0.200.0110.00515.89
7.0.190.0080.00415.56
7.0.180.0060.00915.41
7.0.170.0050.00615.37
7.0.160.0030.00815.44
7.0.150.0120.00315.30
7.0.140.0030.01215.53
7.0.130.0060.00615.59
7.0.120.0080.02017.60
7.0.110.0070.02917.65
7.0.100.0080.01717.65
7.0.90.0060.02317.72
7.0.80.0110.01917.67
7.0.70.0020.03017.63
7.0.60.0070.02517.52
7.0.50.0070.02017.60
7.0.40.0040.02315.60
7.0.30.0080.02415.64
7.0.20.0080.01515.73
7.0.10.0020.02415.72
7.0.00.0080.02815.63
5.6.400.0060.00614.32
5.6.390.0070.00914.58
5.6.380.0060.00914.31
5.6.370.0070.00714.47
5.6.360.0020.01314.22
5.6.350.0100.00514.68
5.6.340.0050.00814.39
5.6.330.0060.00914.32
5.6.320.0000.00914.10
5.6.310.0090.00614.40
5.6.300.0070.01214.11
5.6.290.0060.00914.34
5.6.280.0050.02516.47
5.6.270.0050.02416.65
5.6.260.0050.02216.40
5.6.250.0090.01816.63
5.6.240.0050.02816.59
5.6.230.0060.02616.44
5.6.220.0060.02416.45
5.6.210.0040.02916.41
5.6.200.0030.02116.48
5.6.190.0070.02716.51
5.6.180.0040.01716.47
5.6.170.0040.01916.72
5.6.160.0040.02216.63
5.6.150.0050.02616.48
5.6.140.0030.02016.59
5.6.130.0060.02716.55
5.6.120.0020.02116.66
5.6.110.0060.02016.58
5.6.100.0060.02316.47
5.6.90.0100.02816.61
5.6.80.0020.02816.35
5.6.70.0070.02216.26
5.6.60.0040.02816.25
5.6.50.0040.02216.31
5.6.40.0010.02516.37
5.6.30.0060.01616.34
5.6.20.0050.01416.37
5.6.10.0010.02216.36
5.6.00.0020.02416.27
5.5.380.0050.02015.33
5.5.370.0040.01915.36
5.5.360.0070.01815.39
5.5.350.0050.02015.40
5.5.340.0050.02015.71
5.5.330.0060.02915.58
5.5.320.0040.02115.65
5.5.310.0060.02115.63
5.5.300.0070.03015.54
5.5.290.0070.02215.54
5.5.280.0050.02015.47
5.5.270.0050.01815.63
5.5.260.0050.02015.53
5.5.250.0030.02115.39
5.5.240.0080.02715.39
5.5.230.0070.02415.38
5.5.220.0070.02715.28
5.5.210.0030.02215.27
5.5.200.0030.02015.24
5.5.190.0010.01915.33
5.5.180.0050.01815.22
5.5.170.0060.00814.19
5.5.160.0020.01815.31
5.5.150.0020.01815.17
5.5.140.0040.01915.29
5.5.130.0010.02315.37
5.5.120.0060.01415.30
5.5.110.0040.01615.30
5.5.100.0030.01615.29
5.5.90.0060.01315.38
5.5.80.0020.01515.27
5.5.70.0040.01615.15
5.5.60.0050.01315.20
5.5.50.0050.01615.17
5.5.40.0030.01415.32
5.5.30.0050.01415.25
5.5.20.0070.01315.08
5.5.10.0020.01715.05
5.5.00.0040.01415.22
5.4.450.0040.02013.98
5.4.440.0060.02014.09
5.4.430.0060.03013.92
5.4.420.0010.02613.92
5.4.410.0050.02614.02
5.4.400.0010.03013.88
5.4.390.0030.01813.86
5.4.380.0060.02413.83
5.4.370.0060.01513.82
5.4.360.0010.01814.00
5.4.350.0030.01613.92
5.4.340.0020.01613.90
5.4.330.0030.00511.31
5.4.320.0010.01813.83
5.4.310.0020.01713.93
5.4.300.0040.01313.92
5.4.290.0030.01513.90
5.4.280.0030.01213.93
5.4.270.0030.01613.96
5.4.260.0030.01513.90
5.4.250.0100.01114.04
5.4.240.0060.01214.03
5.4.230.0010.01413.97
5.4.220.0020.01713.90
5.4.210.0030.01513.90
5.4.200.0030.01313.88
5.4.190.0050.01213.88
5.4.180.0060.01413.94
5.4.170.0020.01613.91
5.4.160.0040.01413.95
5.4.150.0010.02113.89
5.4.140.0040.01513.10
5.4.130.0050.01112.88
5.4.120.0020.01313.03
5.4.110.0010.01513.09
5.4.100.0040.01513.10
5.4.90.0060.01113.03
5.4.80.0060.02013.02
5.4.70.0070.02612.89
5.4.60.0040.02413.09
5.4.50.0050.01513.05
5.4.40.0010.03013.09
5.4.30.0040.01513.05
5.4.20.0060.01612.94
5.4.10.0050.02013.15
5.4.00.0020.01912.79

preferences:
37.57 ms | 400 KiB | 5 Q