3v4l.org

run code in 300+ PHP versions simultaneously
similar behaviour applies to the static statement. References are not stored statically: <?php function &get_instance_ref() { static $obj; echo 'Static object: '; var_dump($obj); if (!isset($obj)) { // Assign a reference to the static variable $obj = &new stdclass; } $obj->property++; return $obj; } function &get_instance_noref() { static $obj; static $property=2; echo 'Static object: '; var_dump($obj); if (!isset($obj)) { // Assign the object to the static variable $obj = new stdclass; } $obj->property++; return $obj; } $obj1 = get_instance_ref(); $still_obj1 = get_instance_ref(); echo "\n"; $obj2 = get_instance_noref(); $still_obj2 = get_instance_noref(); $still_obj3 = get_instance_noref(); ?>

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)
5.6.280.0070.07021.12
5.6.250.0070.07020.57
5.6.240.0100.04020.64
5.6.230.0070.04320.60
5.6.220.0030.08320.67
5.6.210.0130.07720.47
5.6.200.0130.07321.05
5.6.190.0070.07721.09
5.6.180.0000.07321.14
5.6.170.0100.08020.95
5.6.160.0070.05321.01
5.6.150.0030.04721.18
5.6.140.0030.06021.05
5.6.130.0030.05021.07
5.6.120.0070.04020.96
5.6.110.0100.04720.95
5.6.100.0030.04720.93
5.6.90.0000.09721.10
5.6.80.0030.08020.46
5.6.70.0100.04720.44
5.6.60.0070.05320.41
5.6.50.0030.07320.34
5.6.40.0030.05320.43
5.6.30.0100.04720.41
5.6.20.0100.08020.50
5.6.10.0030.06720.41
5.6.00.0070.04020.40
5.5.380.0030.04720.46
5.5.370.0070.06020.47
5.5.360.0130.08020.35
5.5.350.0030.06320.38
5.5.340.0070.05020.92
5.5.330.0030.05320.85
5.5.320.0030.08020.94
5.5.310.0130.04320.87
5.5.300.0200.07720.74
5.5.290.0230.06320.80
5.5.280.0100.08320.80
5.5.270.0100.04020.90
5.5.260.0030.08020.78
5.5.250.0100.07720.74
5.5.240.0170.06720.29
5.5.230.0130.04320.26
5.5.220.0100.06720.11
5.5.210.0030.05320.31
5.5.200.0100.07320.28
5.5.190.0070.07720.23
5.5.180.0000.05720.29
5.5.160.0000.07320.23
5.5.150.0100.05020.19
5.5.140.0030.04320.29
5.5.130.0070.08020.25
5.5.120.0000.05320.25
5.5.110.0100.07720.23
5.5.100.0100.08020.17
5.5.90.0100.07320.17
5.5.80.0070.05020.07
5.5.70.0030.08720.11
5.5.60.0070.05020.16
5.5.50.0130.03720.15
5.5.40.0030.05720.04
5.5.30.0070.04320.09
5.5.20.0000.04320.15
5.5.10.0000.03720.09
5.5.00.0030.03320.04
5.4.450.0100.07319.18
5.4.440.0100.06019.45
5.4.430.0100.07019.50
5.4.420.0070.04019.45
5.4.410.0070.04719.38
5.4.400.0030.04018.95
5.4.390.0030.04019.21
5.4.380.0100.07319.11
5.4.370.0200.03319.16
5.4.360.0000.04719.09
5.4.350.0100.05718.87
5.4.340.0070.09018.92
5.4.320.0100.07019.03
5.4.310.0100.07318.88
5.4.300.0000.10018.85
5.4.290.0230.04319.17
5.4.280.0100.06719.18
5.4.270.0070.04019.12
5.4.260.0070.06718.85
5.4.250.0100.06719.22
5.4.240.0070.07718.89
5.4.230.0070.04019.16
5.4.220.0100.04019.04
5.4.210.0100.06019.23
5.4.200.0030.05319.20
5.4.190.0130.03018.94
5.4.180.0100.06319.22
5.4.170.0000.03719.17
5.4.160.0100.06719.14
5.4.150.0070.04019.21
5.4.140.0000.04016.31
5.4.130.0070.03316.47
5.4.120.0070.07316.32
5.4.110.0030.07316.45
5.4.100.0030.04316.48
5.4.90.0070.03316.37
5.4.80.0030.03716.56
5.4.70.0030.07716.31
5.4.60.0000.06716.34
5.4.50.0070.06016.46
5.4.40.0030.06016.49
5.4.30.0070.04016.46
5.4.20.0030.07716.35
5.4.10.0100.04316.29
5.4.00.0000.04015.88
5.3.290.0030.07715.72
5.3.280.0170.06315.72
5.3.270.0070.06015.72
5.3.260.0070.03715.72
5.3.250.0030.07315.72
5.3.240.0030.03715.72
5.3.230.0030.07715.72
5.3.220.0030.07315.72
5.3.210.0030.03315.72
5.3.200.0000.04015.72
5.3.190.0100.07015.72
5.3.180.0000.06015.72
5.3.170.0130.04315.72
5.3.160.0070.05715.72
5.3.150.0000.04315.72
5.3.140.0070.03715.72
5.3.130.0030.05315.72
5.3.120.0030.04315.72
5.3.110.0030.06015.72
5.3.100.0030.07715.72
5.3.90.0100.03715.72
5.3.80.0070.07715.72
5.3.70.0130.03015.72
5.3.60.0000.04315.72
5.3.50.0070.07315.72
5.3.40.0070.04715.72
5.3.30.0030.07715.72
5.3.20.0030.06715.72
5.3.10.0070.07015.72
5.3.00.0070.07315.72
5.2.170.0000.06015.72
5.2.160.0070.06315.72
5.2.150.0030.05015.72
5.2.140.0100.05715.72
5.2.130.0130.04015.72
5.2.120.0070.05715.72
5.2.110.0100.03715.72
5.2.100.0030.06715.72
5.2.90.0070.05715.72
5.2.80.0030.06715.72
5.2.70.0100.05715.72
5.2.60.0070.05315.72
5.2.50.0030.03015.72
5.2.40.0070.02715.72
5.2.30.0100.04315.72
5.2.20.0100.03015.72
5.2.10.0030.04315.72
5.2.00.0070.02315.72
5.1.60.0000.02715.72
5.1.50.0030.05315.72
5.1.40.0200.04715.72
5.1.30.0100.05015.72
5.1.20.0100.03315.72
5.1.10.0100.05015.72
5.1.00.0030.03715.72
5.0.50.0070.02015.72
5.0.40.0070.04015.72
5.0.30.0000.03315.72
5.0.20.0030.04715.72
5.0.10.0030.02315.72
5.0.00.0030.03015.72
4.4.90.0000.03715.72
4.4.80.0000.02715.72
4.4.70.0000.02715.72
4.4.60.0070.01715.72
4.4.50.0000.02315.72
4.4.40.0030.04715.72
4.4.30.0000.03015.72
4.4.20.0070.03315.72
4.4.10.0030.03715.72
4.4.00.0030.03315.72
4.3.110.0000.03715.72
4.3.100.0030.03315.72
4.3.90.0030.02715.72
4.3.80.0070.04715.72
4.3.70.0030.01315.72
4.3.60.0070.01315.72
4.3.50.0000.02715.72
4.3.40.0000.03715.72
4.3.30.0000.01715.72
4.3.20.0030.02715.72
4.3.10.0000.03715.72
4.3.00.0030.02315.72

preferences:
143.51 ms | 1394 KiB | 7 Q