3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(1); $a =& $arr[0]; //$a and $arr[0] are in the same reference set $arr2 = $arr; //not an assignment-by-reference! var_dump($arr2); $arr2[0]++; var_dump($arr2); var_dmp($a); $arr[0]++; var_dump($arr2); var_dump($arr); var_dmp($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)
8.3.60.0040.01118.43
8.3.50.0100.01021.93
8.3.40.0040.01118.80
8.3.30.0110.00418.98
8.3.20.0020.00520.12
8.3.10.0100.00323.61
8.3.00.0090.01319.98
8.2.180.0090.00916.75
8.2.170.0150.00622.96
8.2.160.0070.01020.38
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0030.00526.16
8.2.120.0040.00419.66
8.2.110.0060.00320.38
8.2.100.0030.01017.93
8.2.90.0000.00819.23
8.2.80.0040.00417.97
8.2.70.0090.00017.62
8.2.60.0050.00518.03
8.2.50.0090.00018.07
8.2.40.0040.00422.32
8.2.30.0000.00720.62
8.2.20.0050.00217.61
8.2.10.0070.00017.93
8.2.00.0070.00018.15
8.1.280.0070.00725.92
8.1.270.0130.00320.29
8.1.260.0040.00426.35
8.1.250.0030.00628.09
8.1.240.0060.00324.02
8.1.230.0080.00317.77
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0000.00917.35
8.1.190.0030.00517.22
8.1.180.0040.00418.10
8.1.170.0040.00418.56
8.1.160.0070.00020.65
8.1.150.0000.00718.82
8.1.140.0000.00819.55
8.1.130.0080.00017.63
8.1.120.0000.00817.41
8.1.110.0000.00817.35
8.1.100.0080.00017.44
8.1.90.0030.00317.37
8.1.80.0030.00517.42
8.1.70.0070.00017.25
8.1.60.0040.00417.50
8.1.50.0060.00317.44
8.1.40.0060.00617.51
8.1.30.0030.00617.56
8.1.20.0000.00817.56
8.1.10.0000.00817.53
8.1.00.0030.00617.49
8.0.300.0030.00518.77
8.0.290.0050.00316.75
8.0.280.0070.00018.37
8.0.270.0040.00417.18
8.0.260.0060.00017.10
8.0.250.0070.00016.85
8.0.240.0000.00716.84
8.0.230.0000.00716.91
8.0.220.0030.00316.90
8.0.210.0000.00716.77
8.0.200.0030.00316.96
8.0.190.0070.00016.86
8.0.180.0040.00416.87
8.0.170.0000.00816.79
8.0.160.0030.00316.82
8.0.150.0040.00416.91
8.0.140.0000.00716.73
8.0.130.0050.00313.35
8.0.120.0090.00016.75
8.0.110.0060.00316.77
8.0.100.0060.00316.95
8.0.90.0030.00416.77
8.0.80.0110.00416.86
8.0.70.0060.00316.68
8.0.60.0040.00416.84
8.0.50.0030.00316.77
8.0.30.0060.01017.03
8.0.20.0100.00817.40
8.0.10.0000.00717.00
8.0.00.0110.00716.74
7.4.330.0000.00516.77
7.4.320.0030.00316.54
7.4.300.0030.00316.39
7.4.290.0070.00016.57
7.4.280.0050.00316.50
7.4.270.0000.00716.48
7.4.260.0070.00016.46
7.4.250.0040.00416.55
7.4.240.0020.00616.46
7.4.230.0040.00416.40
7.4.220.0070.01116.39
7.4.210.0140.00016.46
7.4.200.0020.00516.46
7.4.160.0070.01416.38
7.4.150.0090.00917.40
7.4.140.0170.00917.86
7.4.130.0130.00516.44
7.4.120.0120.00916.51
7.4.110.0140.00416.46
7.4.100.0170.00716.60
7.4.90.0070.01116.54
7.4.80.0090.00919.39
7.4.70.0120.00316.68
7.4.60.0040.01816.53
7.4.50.0030.01316.33
7.4.40.0140.00616.45
7.4.30.0160.00616.36
7.4.10.0060.01314.75
7.4.00.0020.01314.93
7.3.330.0040.00313.07
7.3.320.0000.00613.19
7.3.310.0000.00716.38
7.3.300.0070.00016.35
7.3.290.0040.01116.34
7.3.280.0060.01016.33
7.3.270.0090.01517.40
7.3.260.0070.01016.56
7.3.250.0110.01116.34
7.3.240.0060.01216.41
7.3.230.0140.00316.48
7.3.210.0190.00516.38
7.3.200.0130.00316.49
7.3.190.0050.01516.61
7.3.180.0070.01016.35
7.3.170.0070.01416.64
7.3.160.0080.00816.35
7.3.130.0070.01014.63
7.3.120.0070.01014.88
7.3.110.0070.01014.70
7.3.100.0030.01014.81
7.3.90.0030.01114.70
7.3.80.0030.00614.73
7.3.70.0030.01014.94
7.3.60.0040.00414.98
7.3.50.0030.00914.70
7.3.40.0030.00614.63
7.3.30.0060.00914.85
7.3.20.0030.00716.48
7.3.10.0080.00416.75
7.3.00.0090.00516.52
7.2.330.0100.00716.59
7.2.320.0070.01216.64
7.2.310.0070.01116.67
7.2.300.0150.00316.29
7.2.290.0060.01316.22
7.2.260.0130.00314.88
7.2.250.0090.00615.27
7.2.240.0090.00614.60
7.2.230.0070.01015.11
7.2.220.0040.01115.10
7.2.210.0060.00615.06
7.2.200.0030.01014.91
7.2.190.0100.00614.79
7.2.180.0030.01315.20
7.2.170.0060.00714.98
7.2.160.0030.00714.97
7.2.150.0070.00716.91
7.2.140.0030.01016.78
7.2.130.0050.01016.81
7.2.120.0070.00716.72
7.2.110.0050.00716.79
7.2.100.0100.00616.91
7.2.90.0100.00716.94
7.2.80.0070.00616.79
7.2.70.0050.01116.59
7.2.60.0080.00716.79
7.2.50.0040.00716.84
7.2.40.0080.00916.92
7.2.30.0080.00716.79
7.2.20.0100.00716.80
7.2.10.0050.01016.76
7.2.00.0080.00617.64
7.1.330.0060.00915.42
7.1.320.0030.01415.86
7.1.310.0100.00615.50
7.1.300.0070.00715.79
7.1.290.0080.00015.75
7.1.280.0060.00315.83
7.1.270.0000.01315.79
7.1.260.0090.00615.75
7.1.250.0020.01315.64
7.1.240.0080.00715.77
7.1.230.0080.00515.74
7.1.220.0080.00515.88
7.1.210.0060.00615.55
7.1.200.0100.00315.77
7.1.190.0110.00415.72
7.1.180.0110.00515.87
7.1.170.0110.00515.55
7.1.160.0090.00515.82
7.1.150.0130.00315.41
7.1.140.0090.00715.77
7.1.130.0100.00915.61
7.1.120.0070.00815.49
7.1.110.0050.00915.60
7.1.100.0090.00616.58
7.1.90.0050.00915.50
7.1.80.0020.00915.76
7.1.70.0040.01016.23
7.1.60.0080.01216.97
7.1.50.0140.00821.97
7.1.40.0100.00615.77
7.1.30.0060.00815.68
7.1.20.0080.00715.64
7.1.10.0110.00915.58
7.1.00.0130.02717.83
7.0.330.0090.00615.17
7.0.320.0080.00415.46
7.0.310.0080.01015.28
7.0.300.0080.00815.45
7.0.290.0070.00515.27
7.0.280.0090.00915.29
7.0.270.0100.01015.43
7.0.260.0090.00915.48
7.0.250.0110.00315.44
7.0.240.0090.00915.41
7.0.230.0070.00815.46
7.0.220.0100.00315.29
7.0.210.0040.01115.46
7.0.200.0070.00415.83
7.0.190.0070.00715.37
7.0.180.0080.00415.36
7.0.170.0070.01015.45
7.0.160.0030.01415.49
7.0.150.0110.00915.46
7.0.140.0070.00515.46
7.0.130.0080.00615.43
7.0.120.0060.00915.47
7.0.110.0080.00715.49
7.0.100.0050.00815.45
7.0.90.0090.00615.40
7.0.80.0050.01015.24
7.0.70.0060.00815.30
7.0.60.0050.01916.98
7.0.50.0060.02716.27
7.0.40.0130.02515.60
7.0.30.0130.03015.69
7.0.20.0120.02415.64
7.0.10.0050.03315.61
7.0.00.0050.03315.57
5.6.400.0030.00614.62
5.6.390.0030.01014.37
5.6.380.0070.00414.42
5.6.370.0080.00514.38
5.6.360.0030.00914.13
5.6.350.0030.01014.13
5.6.340.0090.00714.24
5.6.330.0100.00714.16
5.6.320.0070.00714.27
5.6.310.0060.00714.25
5.6.300.0060.00814.65
5.6.290.0060.00514.33
5.6.280.0040.01616.62
5.6.270.0040.01013.96
5.6.260.0070.00714.22
5.6.250.0030.01114.23
5.6.240.0060.00614.50
5.6.230.0080.00114.48
5.6.220.0040.00714.26
5.6.210.0050.03116.37
5.6.200.0060.02915.50
5.6.190.0110.02916.49
5.6.180.0070.03416.43
5.6.170.0150.02216.34
5.6.160.0030.03616.42
5.6.150.0090.03015.50
5.6.140.0090.02615.62
5.6.130.0060.02315.65
5.6.120.0080.01516.57
5.6.110.0040.03016.40
5.6.100.0110.02816.44
5.6.90.0060.03216.49
5.6.80.0030.01916.23
5.6.70.0030.01214.13
5.6.60.0030.00814.08
5.6.50.0050.00914.00
5.6.40.0070.00814.10
5.6.30.0050.00914.17
5.6.20.0080.00714.25
5.6.10.0030.00914.22
5.6.00.0050.01114.16
5.5.380.0040.00912.42
5.5.370.0030.00812.79
5.5.360.0030.00712.64
5.5.350.0080.03215.24
5.5.340.0030.01814.34
5.5.330.0030.02915.29
5.5.320.0210.02915.14
5.5.310.0070.01815.27
5.5.300.0110.02614.43
5.5.290.0030.03114.20
5.5.280.0030.02815.30
5.5.270.0060.02315.31
5.5.260.0030.02115.53
5.5.250.0060.03315.29
5.5.240.1290.01815.16
5.5.230.0030.00912.27
5.5.220.0090.00512.55
5.5.210.0060.00612.50
5.5.200.0040.01012.33
5.5.190.0050.00712.50
5.5.180.0040.00512.48
5.5.170.0000.00812.65
5.5.160.0020.00912.44
5.5.150.0070.00612.59
5.5.140.0060.00612.30
5.5.130.0050.00612.46
5.5.120.0000.01312.69
5.5.110.0050.00612.56
5.5.100.0040.00912.66
5.5.90.0060.00712.65
5.5.80.0060.00412.23
5.5.70.0060.00512.51
5.5.60.0070.00612.55
5.5.50.0070.00512.35
5.5.40.0060.00712.47
5.5.30.0030.01012.40
5.5.20.0050.00712.35
5.5.10.0020.00912.61
5.5.00.0000.01012.38

preferences:
63.12 ms | 401 KiB | 5 Q