3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var1 = 'Hello World'; $var2 = ''; $var2 =& $var1; debug_zval_dump(&$var1);

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)
8.1.00.0100.00417.45
8.0.20.0120.00717.40
8.0.10.0190.00717.40
8.0.00.0210.00717.40
7.4.150.0090.01017.40
7.4.140.0220.00617.40
7.4.130.0170.01017.40
7.4.120.0170.00917.40
7.4.110.0160.01017.40
7.4.100.0220.01217.40
7.4.90.0170.00917.40
7.4.80.0170.00917.40
7.4.70.0200.00617.40
7.4.60.0160.01317.40
7.4.50.0160.01017.40
7.4.40.0150.01417.40
7.4.30.0200.00617.40
7.4.20.0140.00917.08
7.4.10.0200.00817.40
7.4.00.0090.01117.40
7.3.270.0060.01117.40
7.3.260.0190.00917.40
7.3.250.0150.01217.40
7.3.240.0170.00917.40
7.3.230.0190.00717.40
7.3.220.0200.00717.40
7.3.210.0190.00717.40
7.3.200.0180.00717.40
7.3.190.0180.00817.40
7.3.180.0210.00617.40
7.3.170.0170.01117.40
7.3.160.0170.01117.40
7.3.150.0220.00817.40
7.3.140.0130.00817.40
7.3.130.0170.01117.40
7.3.120.0190.00817.40
7.3.110.0190.00917.40
7.3.100.0150.01217.40
7.3.90.0180.00817.40
7.3.80.0250.00617.40
7.3.70.0220.00817.40
7.3.60.0260.00517.40
7.3.50.0230.00817.40
7.3.40.0200.00617.40
7.3.30.0160.01017.40
7.3.20.0280.00417.40
7.3.10.0200.01317.40
7.3.00.0240.01117.40
7.2.340.0120.01117.40
7.2.330.0120.01217.40
7.2.320.0190.00817.40
7.2.310.0160.01117.40
7.2.300.0090.01717.40
7.2.290.0120.01317.40
7.2.280.0170.00717.40
7.2.270.0160.00917.40
7.2.260.0170.00617.40
7.2.250.0170.00917.40
7.2.240.0200.00617.40
7.2.230.0160.00817.40
7.2.220.0190.01017.40
7.2.210.0170.00917.40
7.2.200.0210.00517.40
7.2.190.0170.01017.40
7.2.180.0190.00917.40
7.2.170.0170.00817.40
7.2.160.0140.01117.40
7.2.150.0860.01317.40
7.2.140.0160.00717.40
7.2.130.0410.01217.40
7.2.120.0300.00817.40
7.2.110.0190.01017.40
7.2.100.0210.01017.40
7.2.90.0160.01017.40
7.2.80.0160.00817.40
7.2.70.0160.01017.40
7.2.60.0180.00717.40
7.2.50.0200.00917.40
7.2.40.0500.01017.49
7.2.30.0250.00717.40
7.2.20.0240.00917.40
7.2.10.0210.01017.40
7.2.00.0280.01317.40
7.1.330.0560.00317.40
7.1.320.0310.00717.40
7.1.310.0190.01017.40
7.1.300.0470.00717.40
7.1.290.0210.01017.40
7.1.280.0260.00517.40
7.1.270.0150.01217.40
7.1.260.0220.00817.40
7.1.250.0220.00917.40
7.1.240.0150.01417.40
7.1.230.0240.00817.40
7.1.220.0250.00517.40
7.1.210.0220.00717.40
7.1.200.0220.00717.40
7.1.190.0180.01117.40
7.1.180.0230.00917.40
7.1.170.0270.01317.40
7.1.160.0210.01017.40
7.1.150.0240.00617.40
7.1.140.0380.00317.40
7.1.130.0250.00717.40
7.1.120.0230.01217.40
7.1.110.0240.00617.40
7.1.100.0230.00617.40
7.1.90.0280.00817.40
7.1.80.0240.00517.40
7.1.70.0230.00917.40
7.1.60.0210.00817.40
7.1.50.0250.00821.24
7.1.40.0260.00617.40
7.1.30.0240.00617.40
7.1.20.0410.00817.40
7.1.10.0320.00617.40
7.1.00.0250.00817.40
7.0.330.0230.00817.40
7.0.320.0170.00917.40
7.0.310.0210.00817.40
7.0.300.0170.01117.40
7.0.290.0260.00717.40
7.0.280.0290.01017.40
7.0.270.0220.00717.40
7.0.260.0190.01217.40
7.0.250.0210.00717.40
7.0.240.0200.00917.40
7.0.230.0150.01217.40
7.0.220.0260.00617.40
7.0.210.0220.00717.40
7.0.200.0230.00817.40
7.0.190.0280.00417.40
7.0.180.0140.01417.40
7.0.170.0210.00917.40
7.0.160.0190.01217.40
7.0.150.0160.01317.40
7.0.140.0200.01017.40
7.0.130.0170.00717.40
7.0.120.0410.00617.40
7.0.110.0190.01017.40
7.0.100.0170.00917.40
7.0.90.0220.00517.40
7.0.80.0180.01017.40
7.0.70.0150.01017.40
7.0.60.0130.01618.03
7.0.50.0130.02217.51
7.0.40.0130.01818.15
7.0.30.0160.01518.10
7.0.20.0200.02318.08
7.0.10.0140.02618.07
7.0.00.0120.02818.10
5.6.400.0260.01017.40
5.6.390.0190.01217.40
5.6.380.0160.01317.40
5.6.370.0230.00817.40
5.6.360.0200.01017.40
5.6.350.0220.00817.40
5.6.340.0150.01317.40
5.6.330.0150.01617.40
5.6.320.0220.00717.40
5.6.310.0180.01317.40
5.6.300.0220.01217.40
5.6.290.0250.00617.40
5.6.280.0180.00917.40
5.6.270.0150.01217.40
5.6.260.0210.00617.40
5.6.250.0170.01217.40
5.6.240.0190.01217.40
5.6.230.0210.00617.40
5.6.220.0170.01117.40
5.6.210.0130.02318.18
5.6.200.0130.02017.61
5.6.190.0180.02518.21
5.6.180.0170.02118.16
5.6.170.0190.02018.18
5.6.160.0160.02618.17
5.6.150.0150.02717.60
5.6.140.0080.01116.39
5.6.130.0130.01717.58
5.6.120.0120.02118.29
5.6.110.0170.02318.33
5.6.100.0170.02818.30
5.6.90.0250.02818.29
5.6.80.0180.01918.15
5.6.70.0120.01317.40
5.6.60.0210.01017.40
5.6.50.0150.01217.40
5.6.40.0150.01317.40
5.6.30.0180.01617.40
5.6.20.0140.01117.40
5.6.10.0150.01017.40
5.6.00.0110.01517.40
5.5.380.0270.01217.40
5.5.370.0200.01117.40
5.5.360.0240.00817.40
5.5.350.0190.02818.15
5.5.340.0100.02417.53
5.5.330.0170.01918.15
5.5.320.0180.02618.10
5.5.310.0240.02518.16
5.5.300.0160.02717.56
5.5.290.0230.01117.53
5.5.280.0200.02918.21
5.5.270.0190.01618.27
5.5.260.0130.02918.21
5.5.250.0260.03418.17
5.5.240.0100.03118.09
5.5.230.0200.00917.40
5.5.220.0180.01117.40
5.5.210.0230.00817.40
5.5.200.0260.00517.40
5.5.190.0200.00917.40
5.5.180.0180.01217.40
5.5.170.0150.01417.40
5.5.160.0250.00617.40
5.5.150.0210.00817.40
5.5.140.0220.01217.40
5.5.130.0200.00917.40
5.5.120.0170.01317.40
5.5.110.0220.00917.40
5.5.100.0190.01017.40
5.5.90.0230.00517.40
5.5.80.0190.00917.40
5.5.70.0200.01217.40
5.5.60.0170.01117.40
5.5.50.0220.00917.40
5.5.40.0190.00917.40
5.5.30.0160.01317.40
5.5.20.0190.00917.40
5.5.10.0280.01717.40
5.5.00.0210.01117.40
5.4.450.0300.02217.83
5.4.440.0300.02017.92
5.4.430.0250.02017.96
5.4.420.0270.02818.17
5.4.410.0300.02918.13
5.4.400.0400.02717.98
5.4.390.0200.02817.96
5.4.380.0420.02718.03
5.4.370.0480.02817.99
5.4.360.0440.02818.01
5.4.350.0270.02016.65
5.4.340.0250.02216.65
5.4.330.0190.00617.40
5.4.320.0260.02116.75
5.4.310.0320.02516.77
5.4.300.0260.02316.77
5.4.290.0300.02216.77
5.4.280.0200.02416.77
5.4.270.0180.02616.76
5.4.260.0250.01916.75
5.4.250.0250.02516.70
5.4.240.0210.02216.67
5.4.230.0250.02316.68
5.4.220.0250.02316.76
5.4.210.0240.02316.70
5.4.200.0270.02316.30
5.4.190.0280.02016.69
5.4.180.0270.02416.75
5.4.170.0340.02316.74
5.4.160.0270.02116.69
5.4.150.0330.01616.68
5.4.140.0260.02016.09
5.4.130.0250.02216.15
5.4.120.0220.02216.08
5.4.110.0240.02016.15
5.4.100.0280.02416.12
5.4.90.0270.02016.07
5.4.80.0260.02016.14
5.4.70.0240.02116.11
5.4.60.0250.02016.11
5.4.50.0270.01816.11
5.4.40.0210.02516.06
5.4.30.0200.02116.05
5.4.20.0230.02116.14
5.4.10.0210.02116.10
5.4.00.0220.02115.90

preferences:
149.55 ms | 1394 KiB | 7 Q