3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = 'b'; $a = '$b'; echo $a; echo $$a; echo $$$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).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)
7.3.10.0040.01516.41
7.3.00.0000.01416.42
7.2.130.0030.01016.75
7.2.120.0160.00316.75
7.2.110.0170.00016.82
7.2.100.0100.00316.53
7.2.90.0040.00916.41
7.2.80.0160.00517.00
7.2.70.0150.00316.26
7.2.60.0020.00916.55
7.2.50.0120.00316.68
7.2.40.0110.00316.39
7.2.30.0100.00616.84
7.2.20.0030.00716.78
7.2.10.0090.00316.79
7.2.00.0060.00818.00
7.1.250.0100.00315.23
7.1.200.0070.01015.70
7.1.100.0050.01017.68
7.1.70.0000.00816.81
7.1.60.0100.01319.70
7.1.50.0060.01616.67
7.1.00.0000.08022.47
7.0.200.0080.00516.15
7.0.140.0000.07321.97
7.0.80.0070.04719.86
7.0.70.0200.05719.90
7.0.60.0100.07719.90
7.0.50.0100.07720.14
7.0.40.0030.07720.02
7.0.30.0030.09020.07
7.0.20.0200.06020.03
7.0.10.0070.08320.06
7.0.00.0100.07720.14
5.6.280.0070.07020.90
5.6.230.0100.07320.59
5.6.220.0100.07720.57
5.6.210.0100.07720.68
5.6.200.0100.09321.00
5.6.190.0100.07721.07
5.6.180.0100.07721.02
5.6.170.0130.08021.00
5.6.160.0030.05021.01
5.6.150.0070.05020.91
5.6.140.0030.08021.03
5.6.130.0000.09021.10
5.6.120.0070.07020.91
5.6.110.0000.07320.93
5.6.100.0030.08721.05
5.6.90.0100.03721.00
5.6.80.0000.05720.36
5.6.70.0030.08020.43
5.6.60.0130.06320.41
5.6.50.0070.08320.31
5.6.40.0130.09020.31
5.6.30.0170.07320.43
5.6.20.0070.07320.39
5.6.10.0170.07320.35
5.6.00.0000.06320.34
5.5.370.0170.07720.53
5.5.360.0070.08020.43
5.5.350.0070.07720.38
5.5.340.0130.07020.76
5.5.330.0100.07720.91
5.5.320.0070.04720.77
5.5.310.0000.06320.88
5.5.300.0000.08720.81
5.5.290.0200.07020.92
5.5.280.0030.05720.79
5.5.270.0070.08320.75
5.5.260.0130.06320.76
5.5.250.0130.07320.63
5.5.240.0030.08020.13
5.5.230.0070.07720.00
5.5.220.0130.08020.19
5.5.210.0070.08320.16
5.5.200.0000.07319.97
5.5.190.0000.06020.13
5.5.180.0100.07719.98
5.5.160.0100.07320.14
5.5.150.0070.07720.23
5.5.140.0030.08320.20
5.5.130.0130.07320.12
5.5.120.0030.07020.26
5.5.110.0070.07720.08
5.5.100.0100.07320.09
5.5.90.0030.08020.16
5.5.80.0170.04020.14
5.5.70.0070.07720.05
5.5.60.0030.07720.05
5.5.50.0030.07720.05
5.5.40.0030.08320.05
5.5.30.0100.07020.13
5.5.20.0100.04020.08
5.5.10.0130.05019.97
5.5.00.0100.06719.95
5.4.450.0130.07719.55
5.4.440.0070.04019.44
5.4.430.0070.06319.22
5.4.420.0100.04019.35
5.4.410.0100.03319.22
5.4.400.0100.07719.07
5.4.390.0000.07719.12
5.4.380.0100.07019.03
5.4.370.0070.07719.12
5.4.360.0100.04719.01
5.4.350.0070.04018.78
5.4.340.0070.07018.90
5.4.320.0100.06718.90
5.4.310.0130.06719.03
5.4.300.0030.06019.12
5.4.290.0070.07319.02
5.4.280.0070.08019.23
5.4.270.0000.07318.96
5.4.260.0070.08019.05
5.4.250.0000.07018.78
5.4.240.0100.06318.91
5.4.230.0170.04718.97
5.4.220.0100.05718.95
5.4.210.0070.08019.11
5.4.200.0030.06018.78
5.4.190.0100.07019.11
5.4.180.0000.05018.95
5.4.170.0130.07319.06
5.4.160.0030.06719.04
5.4.150.0030.07318.92
5.4.140.0070.07316.39
5.4.130.0030.07016.07
5.4.120.0030.03716.30
5.4.110.0100.04316.22
5.4.100.0030.07316.46
5.4.90.0030.07716.30
5.4.80.0030.07316.39
5.4.70.0100.05316.25
5.4.60.0030.07316.41
5.4.50.0100.07016.35
5.4.40.0100.07316.45
5.4.30.0070.07316.39
5.4.20.0030.07016.39
5.4.10.0070.05016.18
5.4.00.0130.06315.72
5.3.290.0030.05314.65
5.3.280.0100.07714.58
5.3.270.0130.07014.56
5.3.260.0030.08014.54
5.3.250.0170.07014.54
5.3.240.0230.06014.59
5.3.230.0030.04014.42
5.3.220.0030.07314.40
5.3.210.0100.08014.57
5.3.200.0100.07714.42
5.3.190.0100.07314.54
5.3.180.0030.08014.52
5.3.170.0070.07014.52
5.3.160.0130.06714.49
5.3.150.0070.06014.52
5.3.140.0100.07314.49
5.3.130.0070.07314.39
5.3.120.0100.07014.53
5.3.110.0100.05314.54
5.3.100.0130.07313.87
5.3.90.0030.06313.93
5.3.80.0070.07313.78
5.3.70.0070.05313.92
5.3.60.0070.07013.98
5.3.50.0070.07013.69
5.3.40.0030.06013.93
5.3.30.0070.05013.85
5.3.20.0000.05313.63
5.3.10.0070.05713.63
5.3.00.0070.07313.63
5.2.170.0030.05711.73
5.2.160.0130.05311.73
5.2.150.0070.05011.73
5.2.140.0030.06711.73
5.2.130.0070.05711.73
5.2.120.0130.04711.73
5.2.110.0030.06311.73
5.2.100.0100.03711.73
5.2.90.0000.05011.73
5.2.80.0030.05711.73
5.2.70.0000.05711.73
5.2.60.0000.05311.73
5.2.50.0070.05311.73
5.2.40.0030.04711.73
5.2.30.0000.04311.73
5.2.20.0070.06011.73
5.2.10.0030.03711.73
5.2.00.0000.03011.73
5.1.60.0000.05011.73
5.1.50.0070.02711.73
5.1.40.0070.05011.73
5.1.30.0070.05311.73
5.1.20.0100.04711.73
5.1.10.0070.05711.73
5.1.00.0070.05711.73
5.0.50.0000.05311.73
5.0.40.0030.02711.73
5.0.30.0000.06711.73
5.0.20.0030.03011.73
5.0.10.0030.02711.73
5.0.00.0030.03711.73
4.4.90.0000.03311.73
4.4.80.0000.03711.73
4.4.70.0000.03711.73
4.4.60.0070.03011.73
4.4.50.0030.02311.73
4.4.40.0070.05011.73
4.4.30.0070.03311.73
4.4.20.0030.03311.73
4.4.10.0070.02711.73
4.4.00.0070.04011.73
4.3.110.0000.03311.73
4.3.100.0000.02711.73
4.3.90.0000.03711.73
4.3.80.0030.05311.73
4.3.70.0000.03311.73
4.3.60.0000.02711.73
4.3.50.0000.02711.73
4.3.40.0030.03011.73
4.3.30.0000.03711.73
4.3.20.0000.03311.73
4.3.10.0030.03311.73
4.3.00.0070.03011.73