3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '1'; $b = &$a; $b = "2$a"; var_dump($a,$b);

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)
8.3.40.0110.00418.87
8.3.30.0070.00719.13
8.3.20.0040.00420.34
8.3.10.0080.00022.05
8.3.00.0080.00022.51
8.2.170.0060.00922.96
8.2.160.0070.00719.25
8.2.150.0070.00024.18
8.2.140.0080.00024.66
8.2.130.0030.00526.16
8.2.120.0000.00819.68
8.2.110.0050.00522.30
8.2.100.0000.01117.75
8.2.90.0000.00817.78
8.2.80.0000.00817.97
8.2.70.0000.00917.63
8.2.60.0030.00617.80
8.2.50.0040.00418.07
8.2.40.0000.00819.84
8.2.30.0000.00818.13
8.2.20.0000.00817.67
8.2.10.0040.00417.68
8.2.00.0050.00217.68
8.1.270.0050.00318.63
8.1.260.0070.00026.35
8.1.250.0000.00828.09
8.1.240.0090.00022.54
8.1.230.0110.00020.93
8.1.220.0080.00017.74
8.1.210.0040.00418.78
8.1.200.0030.00617.23
8.1.190.0040.00417.40
8.1.180.0070.00018.63
8.1.170.0080.00018.53
8.1.160.0000.00722.16
8.1.150.0070.00018.47
8.1.140.0040.00417.38
8.1.130.0030.00317.82
8.1.120.0040.00417.33
8.1.110.0040.00417.45
8.1.100.0000.00717.23
8.1.90.0070.00017.43
8.1.80.0030.00317.27
8.1.70.0030.00317.32
8.1.60.0020.00517.36
8.1.50.0030.00617.44
8.1.40.0040.00417.34
8.1.30.0000.00817.64
8.1.20.0080.00017.61
8.1.10.0070.00017.41
8.1.00.0040.00417.32
8.0.300.0030.00419.86
8.0.290.0070.00017.05
8.0.280.0030.00518.44
8.0.270.0040.00417.16
8.0.260.0060.00016.67
8.0.250.0000.00616.94
8.0.240.0070.00016.82
8.0.230.0030.00316.86
8.0.220.0030.00316.89
8.0.210.0030.00316.86
8.0.200.0070.00016.95
8.0.190.0040.00416.83
8.0.180.0050.00316.92
8.0.170.0000.00716.87
8.0.160.0000.00716.90
8.0.150.0000.00716.87
8.0.140.0000.00816.81
8.0.130.0030.00313.28
8.0.120.0050.00316.83
8.0.110.0050.00216.89
8.0.100.0050.00316.78
8.0.90.0070.00016.95
8.0.80.0060.00916.93
8.0.70.0040.00416.74
8.0.60.0050.00316.63
8.0.50.0000.00716.71
8.0.30.0110.00716.71
8.0.20.0050.01317.40
8.0.10.0040.00416.84
8.0.00.0110.00816.62
7.4.330.0000.00515.00
7.4.320.0070.00016.45
7.4.300.0060.00016.54
7.4.290.0040.00416.57
7.4.280.0030.00316.57
7.4.270.0050.00316.42
7.4.260.0050.00216.51
7.4.250.0040.00416.41
7.4.240.0040.00416.49
7.4.230.0030.00316.61
7.4.220.0170.00416.65
7.4.210.0070.00916.50
7.4.200.0030.00316.56
7.4.190.0000.00716.43
7.4.160.0030.01316.34
7.4.150.0110.00617.40
7.4.140.0140.00817.86
7.4.130.0130.00516.53
7.4.120.0070.01016.41
7.4.110.0100.00616.31
7.4.100.0110.00616.48
7.4.90.0070.01616.51
7.4.80.0130.01019.39
7.4.70.0130.00316.62
7.4.60.0080.00816.53
7.4.50.0080.00016.40
7.4.40.0130.00322.77
7.4.30.0080.01316.41
7.4.00.0120.00014.85
7.3.330.0000.00513.00
7.3.320.0000.00513.06
7.3.310.0040.00416.29
7.3.300.0030.00316.27
7.3.290.0050.01516.11
7.3.280.0080.00816.21
7.3.270.0120.00617.40
7.3.260.0100.01016.38
7.3.250.0110.00916.38
7.3.240.0130.00416.24
7.3.230.0100.01016.43
7.3.210.0090.00816.43
7.3.200.0180.00019.39
7.3.190.0070.01016.33
7.3.180.0130.00316.13
7.3.170.0100.00716.48
7.3.160.0030.01216.31
7.3.120.0120.00414.78
7.3.110.0030.01014.85
7.3.100.0070.00714.52
7.3.90.0100.00314.70
7.3.80.0000.01314.99
7.3.70.0030.01314.41
7.3.60.0150.00014.56
7.3.50.0050.00514.47
7.3.40.0110.00314.65
7.3.30.0060.00614.73
7.3.20.0130.00516.69
7.3.10.0080.00416.44
7.3.00.0000.01116.43
7.2.330.0120.00816.66
7.2.320.0180.00516.25
7.2.310.0100.00716.58
7.2.300.0090.01416.61
7.2.290.0100.00716.59
7.2.240.0030.01014.92
7.2.230.0030.01315.04
7.2.220.0040.00814.64
7.2.210.0070.00814.83
7.2.200.0090.00314.94
7.2.190.0000.01714.98
7.2.180.0130.00314.91
7.2.170.0120.00414.95
7.2.160.0060.00915.00
7.2.150.0080.00816.49
7.2.140.0110.00416.79
7.2.130.0160.00016.71
7.2.120.0090.00916.84
7.2.110.0070.01416.85
7.2.100.0060.00616.70
7.2.90.0000.01516.59
7.2.80.0030.00916.62
7.2.70.0060.01216.75
7.2.60.0110.00416.82
7.2.50.0130.00616.78
7.2.40.0030.01016.82
7.2.30.0000.01216.70
7.2.20.0060.00916.87
7.2.10.0040.01116.96
7.2.00.0030.00918.13
7.1.330.0040.01116.02
7.1.320.0030.01315.86
7.1.310.0090.00615.70
7.1.300.0080.00815.73
7.1.290.0050.00515.67
7.1.280.0100.00715.92
7.1.270.0080.00815.78
7.1.260.0070.01015.98
7.1.250.0060.00915.75
7.1.100.0090.00618.30
7.1.70.0000.01116.86
7.1.60.0070.01819.82
7.1.50.0100.01417.03
7.1.00.0070.03322.30
7.0.200.0070.00016.80
7.0.140.0100.06721.95
7.0.100.0200.02319.96
7.0.90.0070.03719.99
7.0.80.0030.03719.84
7.0.70.0170.03719.86
7.0.60.0030.06319.95
7.0.50.0170.05020.25
7.0.40.0030.08020.07
7.0.30.0100.05320.07
7.0.20.0070.08020.09
7.0.10.0070.03720.09
7.0.00.0030.06720.15
5.6.280.0130.06321.04
5.6.250.0030.03320.78
5.6.240.0000.03720.68
5.6.230.0000.05020.56
5.6.220.0130.07720.60
5.6.210.0170.05020.63
5.6.200.0030.07720.98
5.6.190.0130.07721.10
5.6.180.0070.06020.95
5.6.170.0030.04321.05
5.6.160.0000.04721.04
5.6.150.0100.03721.03
5.6.140.0030.05721.09
5.6.130.0130.07721.07
5.6.120.0070.05721.16
5.6.110.0070.08721.00
5.6.100.0030.07021.02
5.6.90.0100.04020.99
5.6.80.0030.07320.39
5.6.70.0030.06320.48
5.6.60.0130.04020.40
5.6.50.0070.03720.43
5.6.40.0030.05320.41
5.6.30.0030.03720.44
5.6.20.0100.06320.30
5.6.10.0070.03720.39
5.6.00.0000.06020.41
5.5.380.0100.03720.38
5.5.370.0070.04020.50
5.5.360.0000.08720.40
5.5.350.0070.04020.36
5.5.340.0070.04320.91
5.5.330.0000.08020.82
5.5.320.0030.05320.86
5.5.310.0030.03720.85
5.5.300.0030.04020.88
5.5.290.0100.08020.76
5.5.280.0100.06720.90
5.5.270.0130.07020.89
5.5.260.0030.07020.78
5.5.250.0100.03320.61
5.5.240.0100.04720.11
5.5.230.0070.07320.16
5.5.220.0070.03320.17
5.5.210.0030.04020.30
5.5.200.0070.03719.99
5.5.190.0070.04020.23
5.5.180.0000.04320.27
5.5.160.0000.07020.18
5.5.150.0070.06320.23
5.5.140.0100.05720.07
5.5.130.0000.06720.21
5.5.120.0100.05019.95
5.5.110.0070.07020.21
5.5.100.0000.07720.06
5.5.90.0100.06720.08
5.5.80.0070.07720.10
5.5.70.0000.04720.07
5.5.60.0070.04020.05
5.5.50.0070.03720.05
5.5.40.0030.06720.14
5.5.30.0100.06320.10
5.5.20.0070.08020.07
5.5.10.0000.07720.05
5.5.00.0030.04320.14
5.4.450.0030.05719.39
5.4.440.0170.07319.39
5.4.430.0100.03719.11
5.4.420.0070.04019.54
5.4.410.0070.03719.28
5.4.400.0030.06019.03
5.4.390.0100.03718.97
5.4.380.0070.03719.07
5.4.370.0000.04018.96
5.4.360.0070.03318.96
5.4.350.0100.05018.81
5.4.340.0000.05019.02
5.4.320.0100.07018.81
5.4.310.0030.04318.81
5.4.300.0070.06319.09
5.4.290.0100.03018.96
5.4.280.0000.04719.14
5.4.270.0070.07719.06
5.4.260.0030.05319.02
5.4.250.0000.04719.02
5.4.240.0170.03719.09
5.4.230.0200.06018.96
5.4.220.0100.07019.22
5.4.210.0130.06318.80
5.4.200.0070.06318.96
5.4.190.0030.04718.82
5.4.180.0000.04719.08
5.4.170.0070.05719.11
5.4.160.0030.05318.87
5.4.150.0030.04718.94
5.4.140.0100.07016.10
5.4.130.0130.04016.41
5.4.120.0100.06016.33
5.4.110.0130.05016.27
5.4.100.0070.06716.38
5.4.90.0100.05316.43
5.4.80.0030.06316.40
5.4.70.0070.06716.40
5.4.60.0130.05716.31
5.4.50.0100.04716.21
5.4.40.0070.07716.25
5.4.30.0030.07016.19
5.4.20.0070.07016.20
5.4.10.0130.04716.19
5.4.00.0030.06715.74
5.3.290.0030.05314.57
5.3.280.0100.07314.58
5.3.270.0070.08014.59
5.3.260.0030.05014.58
5.3.250.0030.05714.58
5.3.240.0070.05014.42
5.3.230.0030.07714.55
5.3.220.0100.06714.52
5.3.210.0030.08314.56
5.3.200.0030.03714.55
5.3.190.0170.06014.41
5.3.180.0100.06314.55
5.3.170.0070.07714.41
5.3.160.0030.07014.42
5.3.150.0030.06014.56
5.3.140.0000.04714.52
5.3.130.0070.08014.36
5.3.120.0000.07714.48
5.3.110.0230.03014.50
5.3.100.0070.07314.03
5.3.90.0030.08014.00
5.3.80.0100.07014.02
5.3.70.0130.06313.97
5.3.60.0100.03313.96
5.3.50.0100.06713.93
5.3.40.0100.06713.85
5.3.30.0000.03713.89
5.3.20.0000.07313.66
5.3.10.0070.07313.61
5.3.00.0070.03713.64
5.2.170.0000.06310.99
5.2.160.0000.05711.13
5.2.150.0070.05310.99
5.2.140.0070.05011.20
5.2.130.0100.02010.90
5.2.120.0070.05011.16
5.2.110.0100.02011.09
5.2.100.0070.05311.02
5.2.90.0100.04311.14
5.2.80.0000.05010.95
5.2.70.0070.05011.10
5.2.60.0030.05710.89
5.2.50.0030.05310.83
5.2.40.0100.05310.91
5.2.30.0030.06310.99
5.2.20.0070.05010.94
5.2.10.0130.04710.89
5.2.00.0000.03710.77
5.1.60.0030.0239.82
5.1.50.0030.04010.00
5.1.40.0070.04010.00
5.1.30.0070.04710.42
5.1.20.0000.05310.40
5.1.10.0000.05710.08
5.1.00.0070.05310.09
5.0.50.0000.0278.94
5.0.40.0070.0408.94
5.0.30.0000.0478.94
5.0.20.0000.0478.94
5.0.10.0030.0378.94
5.0.00.0000.0378.94
4.4.90.0030.0338.94
4.4.80.0000.0378.94
4.4.70.0000.0338.94
4.4.60.0030.0308.94
4.4.50.0030.0338.94
4.4.40.0030.0308.94
4.4.30.0100.0208.94
4.4.20.0030.0338.94
4.4.10.0000.0178.94
4.4.00.0000.0278.94
4.3.110.0000.0378.94
4.3.100.0000.0238.94
4.3.90.0000.0378.94
4.3.80.0030.0238.94
4.3.70.0100.0208.94
4.3.60.0000.0308.94
4.3.50.0070.0108.94
4.3.40.0000.0238.94
4.3.30.0030.0338.94
4.3.20.0000.0338.94
4.3.10.0000.0178.94
4.3.00.0030.0308.94

preferences:
40.88 ms | 400 KiB | 5 Q