3v4l.org

run code in 300+ PHP versions simultaneously
<?php $instance = new SimpleClass(); $assigned = $instance; $reference =& $instance; $istance->var = '$assigned avrà questo valore'; $instance = null; // $instance e $reference diventano null var_dump($instance); var_dump($reference); var_dump($assigned); echo $assigned; ?>

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)
8.3.40.0040.01118.96
8.3.30.0150.00318.55
8.3.20.0040.00418.73
8.3.10.0000.00820.48
8.3.00.0000.00823.70
8.2.170.0070.01022.96
8.2.160.0110.00320.38
8.2.150.0040.00424.18
8.2.140.0000.01024.66
8.2.130.0040.00426.16
8.2.120.0050.00319.23
8.2.110.0030.00721.04
8.2.100.0080.00417.78
8.2.90.0060.00319.17
8.2.80.0040.00419.46
8.2.70.0080.00017.38
8.2.60.0050.00317.80
8.2.50.0060.00318.07
8.2.40.0000.00818.22
8.2.30.0040.00419.84
8.2.20.0080.00017.73
8.2.10.0000.00717.75
8.2.00.0100.00017.55
8.1.270.0050.00323.99
8.1.260.0150.00026.35
8.1.250.0070.00028.09
8.1.240.0090.00022.34
8.1.230.0080.00420.85
8.1.220.0000.00917.74
8.1.210.0000.00718.77
8.1.200.0000.01017.22
8.1.190.0030.00617.39
8.1.180.0040.00418.10
8.1.170.0000.00818.50
8.1.160.0050.00318.77
8.1.150.0000.00718.39
8.1.140.0040.00417.20
8.1.130.0040.00417.70
8.1.120.0040.00417.34
8.1.110.0040.00417.23
8.1.100.0040.00417.36
8.1.90.0000.00717.33
8.1.80.0000.00717.38
8.1.70.0040.00417.22
8.1.60.0040.00417.46
8.1.50.0040.00417.39
8.1.40.0080.00017.50
8.1.30.0040.00417.51
8.1.20.0030.00617.61
8.1.10.0080.00017.47
8.1.00.0040.00417.34
8.0.300.0000.00819.91
8.0.290.0000.00816.75
8.0.280.0000.00718.44
8.0.270.0070.00017.20
8.0.260.0030.00316.74
8.0.250.0000.00816.96
8.0.240.0040.00416.95
8.0.230.0030.00316.91
8.0.220.0030.00316.94
8.0.210.0000.00716.87
8.0.200.0000.00716.97
8.0.190.0000.00717.00
8.0.180.0040.00416.94
8.0.170.0030.00316.88
8.0.160.0040.00417.00
8.0.150.0000.00916.76
8.0.140.0040.00416.88
8.0.130.0000.00513.41
8.0.120.0040.00416.73
8.0.110.0000.00816.84
8.0.100.0000.00716.96
8.0.90.0040.00416.76
8.0.80.0060.01116.95
8.0.70.0070.00016.77
8.0.60.0040.00416.77
8.0.50.0040.00416.85
8.0.30.0120.01117.00
8.0.20.0120.00617.40
8.0.10.0040.00416.93
8.0.00.0060.01216.65
7.4.330.0000.00513.43
7.4.320.0060.00316.48
7.4.300.0030.00316.45
7.4.290.0030.00316.44
7.4.280.0050.00316.60
7.4.270.0030.00316.46
7.4.260.0050.00013.14
7.4.250.0000.00716.54
7.4.240.0050.00216.60
7.4.230.0030.00316.51
7.4.220.0090.00616.38
7.4.210.0090.00716.48
7.4.200.0000.00716.54
7.4.190.0070.00016.40
7.4.160.0040.01416.44
7.4.150.0150.00317.40
7.4.140.0080.00917.86
7.4.130.0050.01316.44
7.4.120.0090.00916.53
7.4.110.0140.00416.51
7.4.100.0090.00916.47
7.4.90.0090.00916.36
7.4.80.0070.01319.37
7.4.70.0000.01716.52
7.4.60.0100.00716.25
7.4.50.0000.00816.36
7.4.40.0120.00622.27
7.4.30.0110.01116.46
7.4.00.0110.00415.07
7.3.330.0060.00013.25
7.3.320.0030.00313.21
7.3.310.0070.00016.09
7.3.300.0060.00016.22
7.3.290.0080.00616.21
7.3.280.0110.00716.29
7.3.270.0060.01017.40
7.3.260.0050.01218.24
7.3.250.0150.00516.28
7.3.240.0130.00316.16
7.3.230.0130.00316.39
7.3.210.0130.00316.23
7.3.200.0120.00619.39
7.3.190.0110.00716.22
7.3.180.0060.00916.50
7.3.170.0160.00016.30
7.3.160.0090.00616.34
7.3.120.0080.00614.71
7.3.10.0060.00916.59
7.3.00.0110.00416.49
7.2.330.0120.00616.61
7.2.320.0070.01016.39
7.2.310.0060.01616.24
7.2.300.0140.00916.22
7.2.290.0100.00616.62
7.2.130.0070.01016.86
7.2.120.0090.00616.56
7.2.110.0050.00816.65
7.2.100.0080.00716.65
7.2.90.0100.00516.59
7.2.80.0070.00516.66
7.2.70.0050.00716.88
7.2.60.0050.00916.85
7.2.50.0060.00816.71
7.2.40.0050.01016.77
7.2.30.0030.00916.81
7.2.20.0030.01216.72
7.2.10.0030.01016.60
7.2.00.0070.00517.65
7.1.250.0060.00315.58
7.1.240.0030.00615.63
7.1.230.0090.00615.36
7.1.220.0040.00715.70
7.1.210.0040.01115.64
7.1.200.0050.00815.71
7.1.190.0030.01015.61
7.1.180.0070.00715.82
7.1.170.0030.00715.52
7.1.160.0090.00315.50
7.1.150.0030.01015.66
7.1.140.0070.00415.76
7.1.130.0030.00515.35
7.1.120.0080.00315.76
7.1.110.0090.00315.78
7.1.100.0040.00616.70
7.1.90.0030.00615.61
7.1.80.0120.00015.55
7.1.70.0120.00216.09
7.1.60.0070.01217.50
7.1.50.0040.00916.30
7.1.40.0090.00015.34
7.1.30.0030.01015.70
7.1.20.0070.00615.77
7.1.10.0030.01015.66
7.1.00.0020.02718.97
7.0.320.0070.00715.34
7.0.310.0090.00314.95
7.0.300.0140.00015.32
7.0.290.0030.00915.19
7.0.280.0100.00315.26
7.0.270.0150.00015.28
7.0.260.0030.01015.25
7.0.250.0030.00514.96
7.0.240.0090.00615.46
7.0.230.0000.01415.34
7.0.220.0060.00615.38
7.0.210.0040.01115.11
7.0.200.0030.00815.89
7.0.190.0000.01615.23
7.0.180.0090.00315.41
7.0.170.0000.00715.31
7.0.160.0060.00615.41
7.0.150.0040.00814.98
7.0.140.0040.03918.53
7.0.130.0100.00315.30
7.0.120.0030.00915.40
7.0.110.0050.02217.50
7.0.100.0040.02317.66
7.0.90.0090.02117.66
7.0.80.0070.03817.66
7.0.70.0030.04017.67
7.0.60.0000.04717.58
7.0.50.0080.03817.55
7.0.40.0080.03216.61
7.0.30.0020.02416.50
7.0.20.0020.02616.57
7.0.10.0030.02616.41
7.0.00.0020.02416.54
5.6.380.0030.00713.98
5.6.370.0110.00414.18
5.6.360.0040.00414.21
5.6.350.0030.00614.50
5.6.340.0030.01314.42
5.6.330.0110.00414.36
5.6.320.0070.00714.11
5.6.310.0030.00913.75
5.6.300.0060.00614.24
5.6.290.0100.00314.39
5.6.280.0030.04217.51
5.6.270.0030.00914.12
5.6.260.0110.02517.46
5.6.250.0070.02517.46
5.6.240.0030.02717.25
5.6.230.0060.02417.21
5.6.220.0070.02017.52
5.6.210.0060.03517.41
5.6.200.0050.02617.52
5.6.190.0080.03317.29
5.6.180.0020.02617.40
5.6.170.0050.02317.48
5.6.160.0020.02817.30
5.6.150.0050.02217.50
5.6.140.0030.02817.34
5.6.130.0020.02717.23
5.6.120.0030.02517.46
5.6.110.0070.02317.31
5.6.100.0060.02317.41
5.6.90.0060.02617.51
5.6.80.0090.01816.96
5.6.70.0070.02217.08
5.6.60.0080.02017.04
5.6.50.0040.02816.99
5.6.40.0060.02116.98
5.6.30.0030.02517.03
5.6.20.0080.04016.95
5.6.10.0030.04016.96
5.6.00.0080.03517.15
5.5.380.0040.02314.39
5.5.370.0080.03014.39
5.5.360.0030.02314.39
5.5.350.0070.03514.37
5.5.340.0080.04014.70
5.5.330.0020.02514.76
5.5.320.0030.03314.52
5.5.310.0000.02614.57
5.5.300.0040.02314.72
5.5.290.0050.02114.70
5.5.280.0020.02514.63
5.5.270.0040.02314.68
5.5.260.0000.02514.69
5.5.250.0070.01814.55
5.5.240.0030.02314.41
5.5.230.0040.02414.26
5.5.220.0030.02314.45
5.5.210.0060.02114.38
5.5.200.0030.02014.23
5.5.190.0050.02014.38
5.5.180.0020.04514.36
5.5.170.0070.00713.97
5.5.160.0030.04214.32
5.5.150.0030.03714.19
5.5.140.0030.04014.38
5.5.130.0070.03714.36
5.5.120.0110.03714.39
5.5.110.0050.02914.35
5.5.100.0040.04414.34
5.5.90.0050.02114.19
5.5.80.0050.02414.18
5.5.70.0150.03014.18
5.5.60.0070.03214.19
5.5.50.0090.03714.19
5.5.40.0050.04014.14
5.5.30.0030.04514.32
5.5.20.0050.02414.19
5.5.10.0070.04214.32
5.5.00.0050.04214.18
5.4.450.0010.02615.30
5.4.440.0000.02315.34
5.4.430.0070.01815.31
5.4.420.0100.02415.29
5.4.410.0040.02415.22
5.4.400.0070.02015.27
5.4.390.0030.02115.14
5.4.380.0080.01715.27
5.4.370.0090.01815.19
5.4.360.0050.02215.13
5.4.350.0090.02015.10
5.4.340.0040.04015.27
5.4.330.0030.00611.27
5.4.320.0070.02015.20
5.4.310.0050.03615.13
5.4.300.0030.02515.11
5.4.290.0060.03815.14
5.4.280.0070.04015.13
5.4.270.0050.04015.15
5.4.260.0080.03815.27
5.4.250.0060.03815.14
5.4.240.0080.03315.18
5.4.230.0080.03715.22
5.4.220.0050.04015.13
5.4.210.0030.02615.11
5.4.200.0050.03015.12
5.4.190.0070.02215.27
5.4.180.0050.02815.10
5.4.170.0100.02115.27
5.4.160.0030.04215.10
5.4.150.0090.03515.10
5.4.140.0050.04013.73
5.4.130.0030.04113.76
5.4.120.0050.04013.89
5.4.110.0020.03913.88
5.4.100.0050.02413.83
5.4.90.0030.02213.84
5.4.80.0030.04013.82
5.4.70.0030.03813.83
5.4.60.0080.02713.71
5.4.50.0060.03113.88
5.4.40.0070.04013.84
5.4.30.0030.02413.86
5.4.20.0040.02213.80
5.4.10.0040.04313.79
5.4.00.0090.02613.44
5.3.290.0100.02712.94
5.3.280.0080.04012.82
5.3.270.0080.03412.88
5.3.260.0040.02212.87
5.3.250.0060.03712.94
5.3.240.0050.03912.94
5.3.230.0060.03812.93
5.3.220.0050.02512.86
5.3.210.0030.02512.96
5.3.200.0050.04012.95
5.3.190.0060.03712.96
5.3.180.0000.03212.92
5.3.170.0050.03912.86
5.3.160.0100.03512.81
5.3.150.0050.04012.88
5.3.140.0030.04212.80
5.3.130.0080.03712.87
5.3.120.0000.03112.94
5.3.110.0090.02512.91
5.3.100.0080.03212.62
5.3.90.0030.02312.67
5.3.80.0020.02512.60
5.3.70.0090.01812.61
5.3.60.0060.03912.56
5.3.50.0070.03612.62
5.3.40.0100.03312.57
5.3.30.0020.02512.50
5.3.20.0050.03612.48
5.3.10.0020.04312.43
5.3.00.0050.02512.37
5.2.170.0060.03111.54
5.2.160.0060.02811.54
5.2.150.0020.02511.54
5.2.140.0020.03611.54
5.2.130.0080.03011.54
5.2.120.0030.01811.54
5.2.110.0070.02511.54
5.2.100.0030.03311.54
5.2.90.0050.03211.54
5.2.80.0020.02211.54
5.2.70.0000.03111.54
5.2.60.0050.03311.54
5.2.50.0030.03311.54
5.2.40.0030.03411.54
5.2.30.0020.02011.54
5.2.20.0040.03211.54
5.2.10.0040.03211.54
5.2.00.0070.02711.54
5.1.60.0040.02811.54
5.1.50.0000.02611.54
5.1.40.0050.02711.54
5.1.30.0080.01811.54
5.1.20.0030.03211.54
5.1.10.0050.02911.54
5.1.00.0050.02811.54
5.0.50.0020.02311.54
5.0.40.0070.02011.54
5.0.30.0070.03011.54
5.0.20.0000.01511.54
5.0.10.0020.02311.54
5.0.00.0030.03211.54
4.4.90.0020.02011.54
4.4.80.0030.01711.54
4.4.70.0040.01511.54
4.4.60.0000.01311.54
4.4.50.0030.01011.54
4.4.40.0040.02711.54
4.4.30.0020.01911.54
4.4.20.0020.01311.54
4.4.10.0030.01511.54
4.4.00.0020.02011.54
4.3.110.0030.01611.54
4.3.100.0020.01211.54
4.3.90.0010.01511.54
4.3.80.0050.02811.54
4.3.70.0000.02111.54
4.3.60.0050.01711.54
4.3.50.0070.01711.54
4.3.40.0020.02811.54
4.3.30.0020.02011.54
4.3.20.0030.01211.54
4.3.10.0010.02011.54
4.3.00.0060.01511.54

preferences:
46.56 ms | 400 KiB | 5 Q