3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(0, 1, 2); $ref = &$a[2]; $b = $a; // Element [2] is not int(2) but &int(2) var_dump($a); // Updating $ref also updates $a[2], as expected $ref = 99; var_dump($a); // $b[2] is also &int(99), it references the same object as $a[2] and $ref var_dump($b); // Therefore we can do the same update by reference $b[2] = 1234; var_dump($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)
8.3.60.0060.01218.13
8.3.50.0140.00416.48
8.3.40.0120.00618.71
8.3.30.0040.01118.67
8.3.20.0050.00320.18
8.3.10.0000.00823.45
8.3.00.0080.00019.43
8.2.180.0090.00618.29
8.2.170.0100.00722.96
8.2.160.0040.01520.35
8.2.150.0040.00424.18
8.2.140.0180.00024.66
8.2.130.0040.00426.16
8.2.120.0080.00017.63
8.2.110.0030.00621.05
8.2.100.0040.00718.16
8.2.90.0090.00317.59
8.2.80.0080.00017.97
8.2.70.0030.00617.91
8.2.60.0060.00317.93
8.2.50.0050.00318.10
8.2.40.0030.00520.48
8.2.30.0000.00917.94
8.2.20.0040.00417.69
8.2.10.0000.00718.05
8.2.00.0070.00018.02
8.1.280.0140.00725.92
8.1.270.0070.00020.05
8.1.260.0000.00826.35
8.1.250.0050.00228.09
8.1.240.0040.00421.37
8.1.230.0030.00722.17
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0060.00317.35
8.1.180.0050.00218.10
8.1.170.0040.00418.53
8.1.160.0070.00021.98
8.1.150.0000.00718.87
8.1.140.0040.00417.43
8.1.130.0070.00017.70
8.1.120.0030.00317.43
8.1.110.0040.00417.34
8.1.100.0030.00517.30
8.1.90.0000.00717.31
8.1.80.0000.00717.41
8.1.70.0070.00017.34
8.1.60.0000.00817.42
8.1.50.0000.00917.48
8.1.40.0070.00417.46
8.1.30.0060.00317.66
8.1.20.0030.00617.57
8.1.10.0040.00417.54
8.1.00.0040.00417.30
8.0.300.0040.00419.65
8.0.290.0000.00716.63
8.0.280.0000.00718.45
8.0.270.0070.00017.20
8.0.260.0030.00317.05
8.0.250.0040.00416.79
8.0.240.0000.00616.76
8.0.230.0000.00716.88
8.0.220.0060.00016.82
8.0.210.0070.00016.81
8.0.200.0000.00616.80
8.0.190.0000.00716.77
8.0.180.0040.00416.75
8.0.170.0040.00416.71
8.0.160.0000.00816.77
8.0.150.0050.00316.77
8.0.140.0000.00716.76
8.0.130.0070.00013.30
8.0.120.0000.00816.75
8.0.110.0000.00816.85
8.0.100.0030.00516.79
8.0.90.0070.00016.85
8.0.80.0030.01916.89
8.0.70.0040.00416.65
8.0.60.0000.00716.82
8.0.50.0000.00716.80
8.0.30.0120.00917.05
8.0.20.0090.00917.40
8.0.10.0020.00516.81
8.0.00.0090.01016.63
7.4.330.0050.00015.08
7.4.320.0000.00616.51
7.4.300.0000.00616.57
7.4.290.0070.00016.54
7.4.280.0040.00416.42
7.4.270.0080.00016.56
7.4.260.0040.00416.52
7.4.250.0030.00616.42
7.4.240.0040.00416.55
7.4.230.0070.00016.54
7.4.220.0100.01016.64
7.4.210.0060.00916.44
7.4.200.0000.00716.40
7.4.160.0120.00416.37
7.4.150.0060.01317.40
7.4.140.0090.01317.86
7.4.130.0090.00916.42
7.4.120.0120.00616.46
7.4.110.0090.01016.35
7.4.100.0090.00916.30
7.4.90.0100.00716.31
7.4.80.0090.01519.39
7.4.70.0080.00916.44
7.4.60.0060.01016.41
7.4.50.0000.00916.43
7.4.40.0120.00616.30
7.4.30.0070.01016.60
7.4.10.0060.01215.06
7.4.00.0070.00714.94
7.3.330.0050.00013.05
7.3.320.0000.00613.11
7.3.310.0030.00316.02
7.3.300.0060.00016.15
7.3.290.0030.01116.21
7.3.280.0060.01316.24
7.3.270.0100.01317.40
7.3.260.0100.00716.16
7.3.250.0060.01316.40
7.3.240.0130.00616.43
7.3.230.0090.00916.39
7.3.210.0100.00716.24
7.3.200.0030.01419.39
7.3.190.0120.00916.09
7.3.180.0120.01016.24
7.3.170.0170.00016.40
7.3.160.0180.00416.39
7.3.130.0070.01014.98
7.3.120.0130.00614.96
7.3.110.0060.01214.56
7.3.100.0100.00314.70
7.3.90.0090.00314.99
7.3.80.0060.00314.66
7.3.70.0060.00314.78
7.3.60.0100.00314.87
7.3.50.0060.01014.76
7.3.40.0040.00814.84
7.3.30.0060.00914.45
7.3.20.0090.00316.36
7.3.10.0110.00416.65
7.3.00.0140.00316.58
7.2.330.0060.01216.66
7.2.320.0150.00616.49
7.2.310.0110.00716.73
7.2.300.0120.00316.69
7.2.290.0070.01416.64
7.2.260.0060.00915.14
7.2.250.0070.01114.99
7.2.240.0070.00714.90
7.2.230.0120.00414.74
7.2.220.0100.01014.93
7.2.210.0000.01515.14
7.2.200.0000.01515.11
7.2.190.0070.01014.98
7.2.180.0060.01215.08
7.2.170.0070.01114.93
7.2.160.0070.00714.71
7.2.150.0080.00816.83
7.2.140.0060.00916.62
7.2.130.0030.01316.55
7.2.120.0130.00016.52
7.2.110.0100.01016.83
7.2.100.0130.00316.79
7.2.90.0030.01316.56
7.2.80.0030.00616.60
7.2.70.0100.00316.76
7.2.60.0060.00516.68
7.2.50.0070.01016.82
7.2.40.0030.01216.96
7.2.30.0060.00816.96
7.2.20.0110.00716.88
7.2.10.0070.01117.05
7.2.00.0020.01018.03
7.1.330.0030.00615.55
7.1.320.0100.00315.79
7.1.310.0030.01015.64
7.1.300.0110.00415.80
7.1.290.0080.00615.74
7.1.280.0000.01015.45
7.1.270.0120.00315.68
7.1.260.0120.00315.56
7.1.250.0090.00315.59
7.1.240.0070.00715.57
7.1.230.0040.00715.88
7.1.220.0000.01615.61
7.1.210.0030.00515.51
7.1.200.0070.01115.59
7.1.190.0070.01115.62
7.1.180.0090.00615.89
7.1.170.0070.01115.66
7.1.160.0130.00315.79
7.1.150.0090.00315.73
7.1.140.0110.00415.72
7.1.130.0070.00715.83
7.1.120.0060.00615.64
7.1.110.0070.01015.79
7.1.100.0250.00616.81
7.1.90.0040.00715.67
7.1.80.0040.00715.68
7.1.70.0050.00516.55
7.1.60.0080.00517.94
7.1.50.0080.00816.47
7.1.40.0040.00715.77
7.1.30.0080.00415.57
7.1.20.0070.00715.93
7.1.10.0070.00715.66
7.1.00.0070.03819.23
7.0.330.0040.00815.23
7.0.320.0070.00715.39
7.0.310.0050.00315.21
7.0.300.0040.00715.29
7.0.290.0030.00615.26
7.0.280.0090.00615.27
7.0.270.0070.00415.39
7.0.260.0060.00915.63
7.0.250.0030.01015.64
7.0.240.0000.01115.53
7.0.230.0000.01215.40
7.0.220.0060.00615.48
7.0.210.0030.01015.33
7.0.200.0070.00616.08
7.0.190.0000.00715.42
7.0.180.0030.00515.55
7.0.170.0090.00015.59
7.0.160.0080.00415.29
7.0.150.0110.00415.46
7.0.140.0030.00615.45
7.0.130.0000.00915.55
7.0.120.0070.00715.49
7.0.110.0000.01415.55
7.0.100.0100.00715.48
7.0.90.0070.00715.43
7.0.80.0040.01115.41
7.0.70.0040.00715.25
7.0.60.0110.02017.70
7.0.50.0050.03316.71
7.0.40.0000.02816.65
7.0.30.0100.03016.76
7.0.20.0210.04116.77
7.0.10.0070.04616.78
7.0.00.0050.02616.67
5.6.400.0040.00814.36
5.6.390.0030.00914.23
5.6.380.0030.01114.36
5.6.370.0100.00714.60
5.6.360.0070.00714.30
5.6.350.0070.00414.55
5.6.340.0060.01013.84
5.6.330.0100.00314.07
5.6.320.0030.00814.24
5.6.310.0070.01014.56
5.6.300.0090.00613.90
5.6.290.0080.00014.28
5.6.280.0030.02117.54
5.6.270.0040.01114.59
5.6.260.0030.01214.35
5.6.250.0030.01014.58
5.6.240.0070.00414.54
5.6.230.0030.00714.38
5.6.220.0040.00814.52
5.6.210.0050.03417.48
5.6.200.0050.02916.24
5.6.190.0050.04717.30
5.6.180.0250.03317.27
5.6.170.0180.02317.36
5.6.160.0080.04117.26
5.6.150.0070.03716.06
5.6.140.0030.03916.31
5.6.130.0070.04216.23
5.6.120.0070.03517.82
5.6.110.0070.04717.55
5.6.100.0030.04117.61
5.6.90.0100.04317.74
5.6.80.0050.04817.41
5.6.70.0090.00314.34
5.6.60.0080.00414.21
5.6.50.0000.01114.04
5.6.40.0040.01114.46
5.6.30.0030.00614.52
5.6.20.0040.00414.25
5.6.10.0050.00514.52
5.6.00.0030.01014.02
5.5.380.0110.00014.44
5.5.370.0060.00614.50
5.5.360.0070.00714.30
5.5.350.0150.04017.38
5.5.340.0050.04016.01
5.5.330.0050.04817.29
5.5.320.0050.03217.34
5.5.310.0170.04217.27
5.5.300.0060.04616.17
5.5.290.0050.04516.07
5.5.280.0050.04917.39
5.5.270.0050.03717.57
5.5.260.0110.04217.26
5.5.250.0060.03617.37
5.5.240.0150.01817.04
5.5.230.0110.00414.29
5.5.220.0080.00414.27
5.5.210.0040.00814.05
5.5.200.0070.00314.19
5.5.190.0080.00413.94
5.5.180.0080.00614.09
5.5.170.0060.00314.11
5.5.160.0060.00613.97
5.5.150.0040.00414.26
5.5.140.0060.00914.27
5.5.130.0000.01114.30
5.5.120.0000.01114.12
5.5.110.0040.01114.38
5.5.100.0030.00713.92
5.5.90.0030.01014.27
5.5.80.0000.01114.21
5.5.70.0070.00714.02
5.5.60.0000.01314.21
5.5.50.0040.00414.26
5.5.40.0030.01013.92
5.5.30.0000.01014.00
5.5.20.0090.00414.19
5.5.10.0070.01014.20
5.5.00.0100.00714.38
5.4.450.0130.03815.17
5.4.440.0120.04315.09
5.4.430.0210.03215.35
5.4.420.0150.04215.16
5.4.410.0190.03515.19
5.4.400.0100.02915.17
5.4.390.0150.01714.94
5.4.380.0130.02515.16
5.4.370.0170.03715.11
5.4.360.0180.03815.16
5.4.350.0130.02615.12
5.4.340.0070.02715.08
5.4.330.0060.00011.08
5.4.320.0080.02715.08
5.4.310.0020.03314.99
5.4.300.0070.03214.99
5.4.290.0150.04115.16
5.4.280.0170.02714.97
5.4.270.0110.02614.93
5.4.260.0130.03315.07
5.4.250.0130.02415.08
5.4.240.0200.03215.10
5.4.230.0150.02415.15
5.4.220.0070.02615.13
5.4.210.0120.02114.94
5.4.200.0100.02215.12
5.4.190.0140.01915.07
5.4.180.0140.02215.10
5.4.170.0150.04115.14
5.4.160.0160.02315.09
5.4.150.0170.03015.08
5.4.140.0120.02913.67
5.4.130.0170.03313.70
5.4.120.0120.04213.69
5.4.110.0140.02513.69
5.4.100.0120.02213.69
5.4.90.0080.02413.64
5.4.80.0130.03513.72
5.4.70.0000.01111.08
5.4.60.0000.01111.14
5.4.50.0040.01111.08
5.4.40.0000.01211.08
5.4.30.0030.00611.08
5.4.20.0030.00611.08
5.4.10.0030.00611.08
5.4.00.0000.01011.08

preferences:
67.35 ms | 400 KiB | 5 Q