3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C implements JsonSerializable { var $a = 'lol'; var $b = 'fa'; public function jsonSerialize() { echo __METHOD__, PHP_EOL; $aux = clone($this); unset($aux->a); return $aux; } } echo json_encode(new C());

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)
8.3.60.0480.00717.88
8.3.50.0470.00717.34
8.3.40.0720.00319.88
8.3.30.0340.00720.13
8.3.20.0200.01020.07
8.3.10.0180.01120.23
8.3.00.0230.00419.88
8.2.180.0310.02120.13
8.2.170.0480.02222.96
8.2.160.0490.00922.14
8.2.150.0130.00324.18
8.2.140.0250.00424.66
8.2.130.0290.00526.16
8.2.120.0210.00722.23
8.2.110.0170.01023.60
8.2.100.0200.01020.66
8.2.90.0130.00621.13
8.2.80.0140.00721.98
8.2.70.0120.00821.18
8.2.60.0180.00021.41
8.2.50.0070.01421.00
8.2.40.0120.00622.98
8.2.30.0090.00922.55
8.2.20.0070.01120.56
8.2.10.0050.01421.11
8.2.00.0210.00421.22
8.1.280.0230.01525.92
8.1.270.0340.00325.31
8.1.260.0310.00026.35
8.1.250.0250.00428.09
8.1.240.0210.00426.54
8.1.230.0310.00424.32
8.1.220.0070.01420.78
8.1.210.0110.00820.73
8.1.200.0090.01420.75
8.1.190.0150.00420.73
8.1.180.0060.01022.27
8.1.170.0040.00820.56
8.1.160.0080.01022.39
8.1.150.0040.01521.97
8.1.140.0150.00320.90
8.1.130.0050.00519.56
8.1.120.0090.00920.86
8.1.110.0060.01220.76
8.1.100.0190.00020.87
8.1.90.0170.00020.88
8.1.80.0100.00720.84
8.1.70.0000.02120.80
8.1.60.0120.00820.98
8.1.50.0090.00920.88
8.1.40.0130.00921.00
8.1.30.0150.00720.91
8.1.20.0190.00420.93
8.1.10.0040.01621.02
8.1.00.0100.00720.94
8.0.300.0140.00319.88
8.0.290.0150.00720.00
8.0.280.0190.00021.62
8.0.270.0100.00820.43
8.0.260.0000.00917.98
8.0.250.0100.00718.54
8.0.240.0150.00420.25
8.0.230.0170.00420.26
8.0.220.0130.00917.98
8.0.210.0080.00820.12
8.0.200.0090.00920.20
8.0.190.0150.01220.27
8.0.180.0130.00820.14
8.0.170.0060.00919.70
8.0.160.0200.00020.23
8.0.150.0100.01420.09
8.0.140.0050.01520.05
8.0.130.0120.00816.72
8.0.120.0130.00520.17
8.0.110.0070.01020.13
8.0.100.0100.01020.24
8.0.90.0140.00320.00
8.0.80.0200.04720.12
8.0.70.0110.00719.98
8.0.60.0110.01020.07
8.0.50.0130.00320.16
8.0.30.0440.02020.67
8.0.20.0460.03720.48
8.0.10.0050.01420.21
8.0.00.0610.05119.02
7.4.330.0000.01516.27
7.4.320.0060.00619.48
7.4.300.0130.00419.78
7.4.290.0120.01219.85
7.4.280.0040.01218.69
7.4.270.0200.00019.85
7.4.260.0100.00616.56
7.4.250.0140.01019.83
7.4.240.0090.00318.88
7.4.230.0150.00519.97
7.4.220.0310.03819.68
7.4.210.0210.01418.51
7.4.200.0120.00819.57
7.4.190.0120.00819.84
7.4.160.0490.02020.00
7.4.150.0530.03519.78
7.4.140.0430.01518.96
7.4.130.0670.04119.79
7.4.120.0410.02919.72
7.4.110.1110.03519.89
7.4.100.0790.06619.71
7.4.90.0370.01318.74
7.4.80.0450.04319.93
7.4.70.0310.05819.90
7.4.60.0460.03419.78
7.4.50.0310.00019.64
7.4.40.0480.01819.89
7.4.30.0390.03119.88
7.4.00.0070.02418.20
7.3.330.0190.00316.76
7.3.320.0130.00416.64
7.3.310.0200.00019.62
7.3.300.0100.00619.57
7.3.290.0380.03519.57
7.3.280.0190.03119.52
7.3.270.0680.02719.63
7.3.260.0430.02619.63
7.3.240.0480.02219.86
7.3.230.0630.02419.82
7.3.210.0510.05519.50
7.3.200.0330.03119.54
7.3.190.0620.03619.69
7.3.180.0560.03119.75
7.3.170.0350.03819.54
7.3.160.0790.04819.61
7.3.120.0290.00918.16
7.3.10.0280.00619.34
7.3.00.0240.02019.23
7.2.330.1010.02719.54
7.2.320.0810.04819.81
7.2.310.0590.03019.83
7.2.300.0530.04019.85
7.2.290.0370.02419.62
7.2.130.0290.01519.46
7.2.120.0110.01519.47
7.2.110.0120.01219.51
7.2.100.0090.01819.41
7.2.90.0090.01519.48
7.2.80.0210.00819.42
7.2.70.0150.00317.12
7.2.60.0120.01919.49
7.2.50.0090.01217.12
7.2.40.0190.01019.62
7.2.30.0140.01119.60
7.2.20.0190.00919.34
7.2.10.0180.01819.23
7.2.00.0190.01120.75
7.1.250.0160.00918.34
7.1.200.0070.01518.45
7.1.100.0320.00420.13
7.1.70.0060.01217.42
7.1.60.0180.01819.66
7.1.50.0200.00019.68
7.1.00.0130.07324.94
7.0.200.0070.00419.30
7.0.140.0270.06024.85
7.0.120.0130.07724.96
7.0.90.0270.05721.89
7.0.80.0330.05723.39
7.0.70.0400.05322.12
7.0.60.0470.04321.84
7.0.50.0300.03723.85
7.0.40.0070.05020.95
7.0.30.0070.04721.03
7.0.20.0130.04720.97
7.0.10.0100.04320.87
7.0.00.0000.05020.98
5.6.280.0230.08329.88
5.6.240.0130.04729.38
5.6.230.0130.04729.46
5.6.220.0170.07329.28
5.6.210.0170.05029.57
5.6.200.0100.04729.86
5.6.190.0170.04329.89
5.6.180.0170.03730.04
5.6.170.0170.03329.91
5.6.160.0170.04028.99
5.6.150.0130.04329.98
5.6.140.0070.04030.00
5.6.130.0100.03729.95
5.6.120.0070.04330.03
5.6.110.0100.05029.86
5.6.100.0130.04329.55
5.6.90.0170.03729.92
5.6.80.0070.04029.32
5.6.70.0170.03029.25
5.6.60.0170.03329.18
5.6.50.0070.03723.59
5.6.40.0130.03023.60
5.6.30.0130.03023.59
5.6.20.0030.04023.57
5.6.10.0130.03323.48
5.6.00.0170.07323.63
5.5.380.0170.08023.53
5.5.370.0130.04323.73
5.5.360.0300.05023.66
5.5.350.0100.08723.64
5.5.340.0100.04024.07
5.5.330.0130.04024.07
5.5.320.0130.04024.01
5.5.310.0070.04722.45
5.5.300.0130.04724.00
5.5.290.0070.04322.16
5.5.280.0100.03724.04
5.5.270.0100.03323.93
5.5.260.0130.03723.98
5.5.250.0030.04323.90
5.5.240.0100.03323.43
5.5.230.0100.03323.42
5.5.220.0100.04723.34
5.5.210.0100.03323.31
5.5.200.0070.03723.43
5.5.190.0100.03323.30
5.5.180.0130.03323.45
5.5.160.0030.05323.38
5.5.150.0130.04023.41
5.5.140.0070.05723.52
5.5.130.0170.08323.23
5.5.120.0100.03022.17
5.5.110.0070.05023.32
5.5.100.0100.08323.29
5.5.90.0200.06023.29
5.5.80.0070.06323.25
5.5.70.0100.04723.20
5.5.60.0070.06023.30
5.5.50.0100.04323.27
5.5.40.0170.03723.18
5.5.30.0130.07723.05
5.5.20.0170.04023.20
5.5.10.0100.04323.21
5.5.00.0230.09023.25
5.4.450.0070.03722.50
5.4.440.0100.04322.43
5.4.430.0100.04322.29
5.4.420.0070.04322.41
5.4.410.0000.04722.47
5.4.400.0130.03322.19
5.4.390.0100.03022.12
5.4.380.0100.03322.20
5.4.370.0000.04022.21
5.4.360.0030.04022.16
5.4.350.0070.03321.45
5.4.340.0100.03022.21
5.4.320.0070.08022.12
5.4.310.0070.03721.17
5.4.300.0170.04722.11
5.4.290.0170.04022.10
5.4.280.0030.08021.46
5.4.270.0130.06720.53
5.4.260.0100.08722.09
5.4.250.0030.06022.10
5.4.240.0130.08021.94
5.4.230.0100.05722.18
5.4.220.0070.07722.18
5.4.210.0130.04021.98
5.4.200.0070.05322.01
5.4.190.0200.03322.10
5.4.180.0130.06322.10
5.4.170.0200.06322.10
5.4.160.0030.04022.14
5.4.150.0170.08022.07
5.4.140.0100.06319.51
5.4.130.0130.07719.53
5.4.120.0200.08019.43
5.4.110.0130.06719.47
5.4.100.0200.08019.63
5.4.90.0130.06719.28
5.4.80.0030.08019.58
5.4.70.0100.03019.61
5.4.60.0070.04719.61
5.4.50.0230.04319.43
5.4.40.0100.04019.61
5.4.30.0100.04018.23
5.4.20.0030.04318.24
5.4.10.0030.06718.04
5.4.00.0100.04317.51
5.3.290.0030.08314.80
5.3.280.0070.05014.64
5.3.270.0000.08014.63
5.3.260.0000.08314.52
5.3.250.0070.04714.64
5.3.240.0130.05014.58
5.3.230.0070.03314.57
5.3.220.0030.08314.52
5.3.210.0070.06714.62
5.3.200.0130.03014.59
5.3.190.0000.04014.61
5.3.180.0070.07014.67
5.3.170.0030.03314.58
5.3.160.0030.03014.61
5.3.150.0030.03314.55
5.3.140.0070.04714.58
5.3.130.0070.03314.52
5.3.120.0070.05014.68
5.3.110.0030.06714.52
5.3.100.0000.07713.98
5.3.90.0130.06714.06
5.3.80.0030.06014.00
5.3.70.0070.07014.04
5.3.60.0100.07013.93
5.3.50.0030.08313.83
5.3.40.0070.06013.86
5.3.30.0070.06713.92
5.3.20.0070.07313.75
5.3.10.0000.08013.77
5.3.00.0070.07313.69

preferences:
44.81 ms | 401 KiB | 5 Q