3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A {} $a = new A(); $b = new A(); $a->m = $b; $b->m = $a; var_dump(json_encode($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).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.40.0140.00718.79
8.3.30.0140.00020.39
8.3.20.0000.00818.61
8.3.10.0060.00321.00
8.3.00.0040.00423.66
8.2.170.0080.00822.96
8.2.160.0140.00020.53
8.2.150.0030.00625.66
8.2.140.0040.00424.66
8.2.130.0060.00326.16
8.2.120.0000.00719.69
8.2.110.0060.00320.47
8.2.100.0090.00317.78
8.2.90.0000.00819.23
8.2.80.0000.00817.97
8.2.70.0050.00317.37
8.2.60.0040.00417.90
8.2.50.0060.00318.07
8.2.40.0040.00418.03
8.2.30.0030.00619.32
8.2.20.0040.00417.61
8.2.10.0080.00017.54
8.2.00.0000.00817.49
8.1.270.0030.00623.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0080.00022.10
8.1.230.0070.00317.42
8.1.220.0080.00017.74
8.1.210.0070.00318.77
8.1.200.0050.00517.23
8.1.190.0040.00417.52
8.1.180.0050.00318.10
8.1.170.0040.00418.30
8.1.160.0000.00718.85
8.1.150.0080.00018.59
8.1.140.0000.00717.39
8.1.130.0030.00317.74
8.1.120.0040.00417.45
8.1.110.0040.00417.39
8.1.100.0050.00217.43
8.1.90.0000.00717.37
8.1.80.0000.00717.29
8.1.70.0030.00317.29
8.1.60.0050.00317.51
8.1.50.0030.00517.30
8.1.40.0040.00417.38
8.1.30.0000.00817.41
8.1.20.0030.00517.51
8.1.10.0080.00017.54
8.1.00.0050.00217.45
8.0.300.0040.00418.77
8.0.290.0020.00516.63
8.0.280.0040.00418.44
8.0.270.0030.00317.11
8.0.260.0050.00216.76
8.0.250.0040.00416.89
8.0.240.0060.00316.91
8.0.230.0030.00316.86
8.0.220.0070.00016.72
8.0.210.0000.00816.83
8.0.200.0040.00416.80
8.0.190.0030.00616.85
8.0.180.0000.00816.77
8.0.170.0030.00316.77
8.0.160.0070.00016.92
8.0.150.0030.00416.66
8.0.140.0000.00716.63
8.0.130.0030.00313.21
8.0.120.0080.00016.75
8.0.110.0040.00416.89
8.0.100.0040.00416.83
8.0.90.0040.00416.70
8.0.80.0050.01016.77
8.0.70.0020.00516.88
8.0.60.0000.00716.82
8.0.50.0000.00816.81
8.0.30.0090.00916.95
8.0.20.0100.01117.40
8.0.10.0000.00716.83
8.0.00.0060.01116.57
7.4.330.0030.00315.05
7.4.320.0040.00416.59
7.4.300.0070.00016.54
7.4.290.0020.00516.57
7.4.280.0040.00416.54
7.4.270.0030.00316.60
7.4.260.0060.00013.21
7.4.250.0040.00416.31
7.4.240.0070.00016.45
7.4.230.0070.00016.52
7.4.220.0040.01516.38
7.4.210.0030.01316.54
7.4.200.0030.00316.53
7.4.190.0070.00016.40
7.4.160.0090.00616.52
7.4.150.0030.01317.40
7.4.140.0080.01017.86
7.4.130.0130.00816.46
7.4.120.0090.00916.41
7.4.110.0070.01516.40
7.4.100.0090.00916.36
7.4.90.0090.01316.34
7.4.80.0000.01719.39
7.4.70.0090.01316.57
7.4.60.0150.00616.36
7.4.50.0030.00616.43
7.4.40.0060.00622.77
7.4.30.0090.01216.45
7.4.00.0080.00914.96
7.3.330.0000.00713.24
7.3.320.0000.00513.25
7.3.310.0040.00416.14
7.3.300.0060.00016.11
7.3.290.0100.00316.23
7.3.280.0050.01116.28
7.3.270.0120.00617.40
7.3.260.0130.00518.24
7.3.250.0100.00816.24
7.3.240.0130.00316.18
7.3.230.0110.00716.39
7.3.210.0150.00616.33
7.3.200.0100.01019.39
7.3.190.0090.01316.51
7.3.180.0120.00316.49
7.3.170.0060.00916.55
7.3.160.0140.00316.31
7.3.120.0050.01114.85
7.3.110.0070.01114.74
7.3.100.0070.00714.76
7.3.90.0070.00314.42
7.3.80.0100.00714.52
7.3.70.0100.00714.93
7.3.60.0000.01114.62
7.3.50.0130.00314.81
7.3.40.0070.00714.82
7.3.30.0070.00714.47
7.3.20.0130.00316.63
7.3.10.0160.00316.46
7.3.00.0080.00916.69
7.2.330.0100.00916.47
7.2.320.0090.00916.72
7.2.310.0090.00916.72
7.2.300.0060.01116.46
7.2.290.0140.00616.66
7.2.250.0070.01415.03
7.2.240.0000.02115.04
7.2.230.0120.00615.16
7.2.220.0030.00614.91
7.2.210.0060.00914.75
7.2.200.0060.00714.84
7.2.190.0120.00314.86
7.2.180.0000.01315.14
7.2.170.0090.00014.81
7.2.130.0060.01416.68
7.2.120.0060.01316.79
7.2.110.0080.01216.80
7.2.100.0210.00316.31
7.2.90.0130.01316.82
7.2.80.0070.01116.66
7.2.70.0100.01016.84
7.2.60.0100.01016.46
7.2.50.0060.01316.72
7.2.40.0250.01116.54
7.2.30.0090.00916.51
7.2.20.0270.00616.50
7.2.10.0140.00616.83
7.2.00.0130.00617.96
7.1.330.0090.00315.47
7.1.320.0040.00715.69
7.1.310.0030.01016.05
7.1.300.0120.00315.76
7.1.290.0030.01015.80
7.1.280.0000.01015.66
7.1.270.0030.01015.61
7.1.260.0100.00315.88
7.1.250.0200.00615.63
7.1.100.0000.01418.35
7.1.70.0030.00717.28
7.1.60.0070.01519.17
7.1.50.0100.01416.79
7.1.00.0000.03722.25
7.0.200.0030.00616.79
7.0.140.0000.07322.00
7.0.110.0030.07719.94
7.0.100.0130.07319.96
7.0.90.0130.06719.95
7.0.80.0130.04020.05
7.0.70.0100.04720.06
7.0.60.0170.05319.91
7.0.50.0100.07019.90
7.0.40.0130.07019.87
7.0.30.0070.08319.75
7.0.20.0070.07319.85
7.0.10.0130.05719.84
7.0.00.0170.03719.86
5.6.280.0000.07720.92
5.6.260.0070.08720.69
5.6.250.0130.07720.64
5.6.240.0070.08020.56
5.6.230.0030.06020.66
5.6.220.0030.08320.70
5.6.210.0000.05020.64
5.6.200.0070.08320.62
5.6.190.0070.08320.64
5.6.180.0100.08020.56
5.6.170.0130.08020.86
5.6.160.0130.05720.66
5.6.150.0000.08720.70
5.6.140.0100.03320.67
5.6.130.0030.08720.85
5.6.120.0030.04320.70
5.6.110.0130.06720.60
5.6.100.0170.07020.54
5.6.90.0070.08020.61
5.6.80.0170.07019.95
5.6.70.0100.07719.98
5.6.60.0170.06019.99
5.6.50.0100.04319.99
5.6.40.0130.07020.04
5.6.30.0070.07319.97
5.6.20.0070.07719.91
5.6.10.0100.06019.99
5.6.00.0170.06719.98
5.5.380.0100.07317.52
5.5.370.0170.07317.67
5.5.360.0070.08317.62
5.5.350.0070.08317.61
5.5.340.0070.07317.93
5.5.330.0030.07718.09
5.5.320.0100.07717.89
5.5.310.0100.06718.09
5.5.300.0070.08017.91
5.5.290.0100.08018.09
5.5.280.0070.04718.10
5.5.270.0130.07018.09
5.5.260.0070.06018.22
5.5.250.0100.07718.04
5.5.240.0130.07017.43
5.5.230.0170.06717.48
5.5.220.0070.07017.29
5.5.210.0100.04317.46
5.5.200.0100.06017.45
5.5.190.0100.08017.45
5.5.180.0030.04017.18
5.5.160.0270.02717.58
5.5.150.0070.07717.47
5.5.140.0100.07717.16
5.5.130.0070.05717.43
5.5.120.0030.08017.25
5.5.110.0000.05317.46
5.5.100.0000.05017.35
5.5.90.0100.03717.50
5.5.80.0070.07317.37
5.5.70.0000.05017.16
5.5.60.0100.07017.50
5.5.50.0030.08017.34
5.5.40.0030.04317.19
5.5.30.0070.08017.33
5.5.20.0030.05017.16
5.5.10.0030.05017.50
5.5.00.0170.06017.37
5.4.450.0070.07719.36
5.4.440.0100.08019.30
5.4.430.0230.06319.66
5.4.420.0100.08019.27
5.4.410.0130.05319.21
5.4.400.0070.04019.01
5.4.390.0170.07018.98
5.4.380.0130.06719.25
5.4.370.0000.08319.23
5.4.360.0000.05319.14
5.4.350.0070.08019.34
5.4.340.0030.06719.25
5.4.320.0030.08018.93
5.4.310.0070.08018.99
5.4.300.0030.07019.31
5.4.290.0070.07719.13
5.4.280.0100.07319.33
5.4.270.0130.07019.16
5.4.260.0070.06719.00
5.4.250.0030.07319.00
5.4.240.0100.07318.94
5.4.230.0100.07019.00
5.4.220.0030.09319.18
5.4.210.0130.07019.21
5.4.200.0030.07719.02
5.4.190.0030.06019.08
5.4.180.0070.06019.17
5.4.170.0070.07719.13
5.4.160.0100.07719.16
5.4.150.0100.04019.14
5.4.140.0100.06716.31
5.4.130.0100.06716.29
5.4.120.0030.07016.44
5.4.110.0000.07016.32
5.4.100.0100.06316.50
5.4.90.0030.07316.55
5.4.80.0130.05316.45
5.4.70.0200.05716.32
5.4.60.0100.07016.29
5.4.50.0070.06716.33
5.4.40.0030.05016.53
5.4.30.0070.07316.38
5.4.20.0070.06716.47
5.4.10.0070.06316.39
5.4.00.0130.07315.88
5.3.290.0070.07314.80
5.3.280.0000.05714.72
5.3.270.0030.04714.56
5.3.260.0030.05714.57
5.3.250.0070.06714.45
5.3.240.0130.07014.59
5.3.230.0030.05314.66
5.3.220.0070.07014.54
5.3.210.0100.07014.79
5.3.200.0000.07714.70
5.3.190.0130.07014.51
5.3.180.0070.07714.51
5.3.170.0100.06014.55
5.3.160.0070.06014.58
5.3.150.0100.06714.52
5.3.140.0070.07714.54
5.3.130.0100.06314.54
5.3.120.0070.07714.67
5.3.110.0100.07714.55
5.3.100.0070.07314.04
5.3.90.0030.08014.12
5.3.80.0170.04714.03
5.3.70.0170.06313.99
5.3.60.0070.07314.03
5.3.50.0070.06713.96
5.3.40.0030.07713.93
5.3.30.0100.06714.03
5.3.20.0000.08013.76
5.3.10.0070.07013.64
5.3.00.0070.07713.61
5.2.170.0130.06012.21
5.2.160.0030.03712.21
5.2.150.0070.06312.21
5.2.140.0100.05712.21
5.2.130.0000.03712.21
5.2.120.0070.04312.21
5.2.110.0100.06012.21
5.2.100.0070.04012.21
5.2.90.0100.05712.21
5.2.80.0100.05012.21
5.2.70.0030.05312.21
5.2.60.0000.07312.21
5.2.50.0070.04012.21
5.2.40.0100.05712.21
5.2.30.0100.03312.21
5.2.20.0030.06012.21
5.2.10.0030.03712.21
5.2.00.0070.06012.21
5.1.60.0100.04012.21
5.1.50.0100.05012.21
5.1.40.0070.05012.21
5.1.30.0030.05712.21
5.1.20.0070.05012.21
5.1.10.0030.05012.21
5.1.00.0030.04312.21
5.0.50.0070.04312.21
5.0.40.0070.04012.21
5.0.30.0030.06712.21
5.0.20.0070.03712.21
5.0.10.0030.04312.21
5.0.00.0000.04712.21
4.4.90.0070.03312.21
4.4.80.0030.03312.21
4.4.70.0100.03012.21
4.4.60.0000.02012.21
4.4.50.0030.03012.21
4.4.40.0030.05012.21
4.4.30.0030.03712.21
4.4.20.0000.04012.21
4.4.10.0000.02012.21
4.4.00.0070.04312.21
4.3.110.0000.02312.21
4.3.100.0070.03012.21
4.3.90.0070.01712.21
4.3.80.0030.05312.21
4.3.70.0070.03012.21
4.3.60.0000.03712.21
4.3.50.0070.03312.21
4.3.40.0000.05012.21
4.3.30.0030.03312.21
4.3.20.0000.04012.21
4.3.10.0070.03012.21
4.3.00.0000.02012.21

preferences:
42.34 ms | 400 KiB | 5 Q