3v4l.org

run code in 300+ PHP versions simultaneously
<pre><?php $var1 = 'ccc'; $var2 = $var1; echo "separate variables\n"; debug_zval_dump($var1, $var2); $var2 .= 'xxx'; debug_zval_dump($var1, $var2);

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)
8.3.60.0120.00618.45
8.3.50.0110.00722.81
8.3.40.0150.00318.67
8.3.30.0030.01018.92
8.3.20.0050.00220.21
8.3.10.0040.00423.61
8.3.00.0040.00419.38
8.2.180.0130.00316.63
8.2.170.0040.01122.96
8.2.160.0110.00420.57
8.2.150.0060.00324.18
8.2.140.0000.00724.66
8.2.130.0050.00226.16
8.2.120.0050.00321.06
8.2.110.0030.00620.27
8.2.100.0000.01118.16
8.2.90.0040.00419.36
8.2.80.0000.00917.97
8.2.70.0000.00817.63
8.2.60.0080.00017.93
8.2.50.0000.00818.07
8.2.40.0090.00018.22
8.2.30.0000.00719.48
8.2.20.0080.00017.71
8.2.10.0040.00418.03
8.2.00.0040.00417.72
8.1.280.0110.00725.92
8.1.270.0000.00823.96
8.1.260.0000.00726.35
8.1.250.0000.00728.09
8.1.240.0090.00022.02
8.1.230.0110.00019.16
8.1.220.0000.00917.74
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0060.00317.10
8.1.180.0030.00518.10
8.1.170.0040.00418.52
8.1.160.0040.00421.94
8.1.150.0030.00518.79
8.1.140.0050.00217.41
8.1.130.0070.00017.89
8.1.120.0030.00317.28
8.1.110.0000.00717.44
8.1.100.0030.00317.27
8.1.90.0000.00717.28
8.1.80.0040.00417.28
8.1.70.0000.00717.25
8.1.60.0030.00617.35
8.1.50.0000.00817.47
8.1.40.0040.00417.34
8.1.30.0000.00817.52
8.1.20.0000.00717.44
8.1.10.0070.00017.47
8.1.00.0030.00517.42
8.0.300.0080.00018.77
8.0.290.0000.00716.63
8.0.280.0000.00718.39
8.0.270.0030.00317.24
8.0.260.0070.00017.34
8.0.250.0000.00716.81
8.0.240.0000.00716.79
8.0.230.0000.00716.76
8.0.220.0100.00016.34
8.0.210.0040.00416.79
8.0.200.0000.00616.89
8.0.190.0050.00316.94
8.0.180.0000.00716.89
8.0.170.0000.00816.85
8.0.160.0000.00716.80
8.0.150.0040.00416.79
8.0.140.0000.00716.67
8.0.130.0060.00013.23
8.0.120.0080.00016.61
8.0.110.0040.00416.77
8.0.100.0000.00816.87
8.0.90.0040.00416.88
8.0.80.0120.00316.78
8.0.70.0040.00416.81
8.0.60.0020.00516.67
8.0.50.0070.00016.84
8.0.30.0110.01417.04
8.0.20.0120.00617.40
8.0.10.0040.00417.04
8.0.00.0060.01216.61
7.4.330.0000.00615.00
7.4.320.0030.00316.48
7.4.300.0000.00616.42
7.4.290.0030.00316.52
7.4.280.0040.00416.52
7.4.270.0030.00316.43
7.4.260.0030.00316.40
7.4.250.0070.00016.53
7.4.240.0050.00216.40
7.4.230.0070.00016.40
7.4.220.0130.01316.46
7.4.210.0110.00816.59
7.4.200.0040.00416.43
7.4.160.0080.00816.48
7.4.150.0170.00317.40
7.4.140.0150.00217.86
7.4.130.0110.00616.47
7.4.120.0060.01116.27
7.4.110.0030.01516.26
7.4.100.0170.00016.41
7.4.90.0130.00716.51
7.4.80.0090.01319.39
7.4.70.0130.00316.45
7.4.60.0070.01116.21
7.4.50.0060.00016.25
7.4.40.0080.00816.55
7.4.30.0050.01216.48
7.4.00.0000.01715.05
7.3.330.0000.00613.05
7.3.320.0000.00512.93
7.3.310.0000.00716.33
7.3.300.0000.00616.23
7.3.290.0100.01016.16
7.3.280.0030.01616.19
7.3.270.0130.00417.40
7.3.260.0150.00916.21
7.3.250.0100.00716.38
7.3.240.0120.00416.33
7.3.230.0060.01016.47
7.3.210.0060.01116.35
7.3.200.0060.01519.39
7.3.190.0130.01016.16
7.3.180.0110.00516.18
7.3.170.0030.01816.38
7.3.160.0160.00016.56
7.2.330.0000.01716.62
7.2.320.0140.00316.25
7.2.310.0150.00316.48
7.2.300.0060.00916.44
7.2.290.0030.01316.57
7.2.60.0030.01016.92
7.2.00.0000.01419.35
7.1.200.0040.01115.88
7.1.100.0060.00618.20
7.1.70.0060.00316.85
7.1.60.0120.00919.46
7.1.50.0040.00816.64
7.1.00.0030.07722.37
7.0.200.0040.00416.78
7.0.140.0000.07721.99
7.0.60.0030.06719.91
7.0.50.0070.08017.79
7.0.40.0070.04020.23
7.0.30.0230.04020.02
7.0.20.0300.07320.16
7.0.10.0070.09020.20
7.0.00.0000.06720.33
5.6.280.0030.07320.81
5.6.210.0000.04320.54
5.6.200.0100.08718.18
5.6.190.0070.08720.45
5.6.180.0330.06320.41
5.6.170.0300.04320.62
5.6.160.0130.07720.50
5.6.150.0000.07718.17
5.6.140.0100.07318.22
5.6.130.0070.08718.21
5.6.120.0100.07320.99
5.6.110.0030.09020.97
5.6.100.0100.07020.96
5.6.90.0000.04321.09
5.6.80.0100.08020.52
5.6.70.3300.03720.43
5.5.350.0170.07720.34
5.5.340.0130.06717.89
5.5.330.0130.07020.43
5.5.320.0230.07720.41
5.5.310.0200.05320.17
5.5.300.0030.07717.87
5.5.290.0070.07317.95
5.5.280.0030.06320.80
5.5.270.0130.08020.86
5.5.260.0100.07720.66
5.5.250.0070.04020.61
5.5.240.0270.04320.15
5.4.450.0130.03019.55
5.4.440.0600.04319.25
5.4.430.0070.03719.27
5.4.420.1070.04319.55
5.4.410.0200.05018.97
5.4.400.0200.04019.10
5.4.390.0230.03319.08
5.4.380.0470.07318.58
5.4.370.0230.06018.59
5.4.360.0430.06718.56
5.4.350.0530.05718.39
5.4.340.0300.05318.78
5.4.320.0140.04612.45
5.4.310.0100.04912.45
5.4.300.0040.05412.46
5.4.290.0070.05512.45
5.4.280.0080.03912.34
5.4.270.0040.03912.34
5.4.260.0100.03712.35
5.4.250.0070.04512.35
5.4.240.0050.04012.34
5.4.230.0100.05112.34
5.4.220.0060.03612.34
5.4.210.0090.05012.34
5.4.200.0090.05112.34
5.4.190.0080.05112.34
5.4.180.0100.04312.33
5.4.170.0090.03312.34
5.4.160.0090.03312.34
5.4.150.0070.03612.34
5.4.140.0050.03812.02
5.4.130.0070.04812.01
5.4.120.0090.03611.97
5.4.110.0050.03611.96
5.4.100.0080.03811.96
5.4.90.0070.03611.96
5.4.80.0100.04711.96
5.4.70.0040.03711.96
5.4.60.0060.03511.96
5.4.50.0080.03311.96
5.4.40.0060.04511.95
5.4.30.0090.04011.95
5.4.20.0050.03611.94
5.4.10.0080.03211.95
5.4.00.0060.03511.43
5.3.290.0130.03412.80
5.3.280.0060.03912.71
5.3.270.0050.03912.73
5.3.260.0060.04012.72
5.3.250.0060.03812.72
5.3.240.0040.04312.72
5.3.230.0050.04212.70
5.3.220.0070.03712.68
5.3.210.0060.03912.68
5.3.200.0060.03712.68
5.3.190.0100.03512.68
5.3.180.0130.04312.67
5.3.170.0100.04012.67
5.3.160.0090.04512.68
5.3.150.0110.05012.67
5.3.140.0140.03312.66
5.3.130.0080.03812.65
5.3.120.0090.03512.66
5.3.110.0100.04312.66
5.3.100.0100.03312.12
5.3.90.0060.04412.08
5.3.80.0060.03612.08
5.3.70.0070.03612.07
5.3.60.0070.03512.07
5.3.50.0060.03512.00
5.3.40.0070.03512.00
5.3.30.0050.03611.94
5.3.20.0040.03811.73
5.3.10.0060.03511.69
5.3.00.0090.03411.67
5.2.170.0120.0359.18
5.2.160.0080.0389.18
5.2.150.0080.0439.18
5.2.140.0060.0429.18
5.2.130.0050.0489.13
5.2.120.0100.0429.13
5.2.110.0110.0609.14
5.2.100.0080.0429.14
5.2.90.0080.0419.14
5.2.80.0060.0499.13
5.2.70.0080.0379.13
5.2.60.0070.0409.09
5.2.50.0060.0429.05
5.2.40.0060.0399.03
5.2.30.0040.0439.01
5.2.20.0050.0349.00
5.2.10.0040.0298.91
5.2.00.0040.0358.77
5.1.60.0030.0268.06
5.1.50.0050.0268.06
5.1.40.0060.0288.04
5.1.30.0050.0318.39
5.1.20.0090.0508.41
5.1.10.0120.0498.14
5.1.00.0070.0278.13
5.0.50.0030.0226.61
5.0.40.0060.0196.48
5.0.30.0050.0316.29
5.0.20.0040.0246.25
5.0.10.0060.0196.23
5.0.00.0030.0376.23
4.4.90.0050.0224.78
4.4.80.0040.0234.75
4.4.70.0010.0234.76
4.4.60.0020.0224.76
4.4.50.0040.0214.77
4.4.40.0060.0304.71
4.4.30.0060.0184.76
4.4.20.0020.0184.85
4.4.10.0060.0134.85
4.4.00.0020.0304.76
4.3.110.0040.0154.67
4.3.100.0040.0174.66
4.3.90.0020.0174.63
4.3.80.0060.0224.58
4.3.70.0040.0144.63
4.3.60.0040.0134.63
4.3.50.0000.0204.62
4.3.40.0060.0224.54
4.3.30.0020.0163.28
4.3.20.0060.0163.26
4.3.10.0030.0153.22
4.3.00.0070.01318.56

preferences:
39.07 ms | 401 KiB | 5 Q