3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C implements JsonSerializable { var $a = 'lol'; var $b = 'fa'; public function jsonSerialize() { return clone($this); } } 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)
8.3.40.0360.02635.54
8.3.30.0320.02237.07
8.3.20.0160.01037.21
8.3.10.0160.00636.85
8.3.00.0060.01638.33
8.2.170.0650.01348.08
8.2.160.0340.02749.84
8.2.150.0180.01447.89
8.2.140.0260.01048.15
8.2.130.0140.00750.18
8.2.120.0260.01348.54
8.2.110.0100.02848.46
8.2.100.0320.01347.16
8.2.90.0160.01348.32
8.2.80.0130.01747.03
8.2.70.0220.00946.88
8.2.60.0160.02047.17
8.2.50.0210.01046.63
8.2.40.0170.01747.59
8.2.30.0140.01448.75
8.2.20.0180.01146.80
8.2.10.0170.01047.00
8.2.00.0220.01147.00
8.1.270.0200.01351.07
8.1.260.0200.01049.42
8.1.250.0130.01351.88
8.1.240.0260.00651.57
8.1.230.0330.01650.15
8.1.220.0130.01646.80
8.1.210.0130.01948.52
8.1.200.0210.01446.60
8.1.190.0160.01346.66
8.1.180.0190.01346.60
8.1.170.0150.01547.84
8.1.160.0100.01747.96
8.1.150.0100.02447.68
8.1.140.0170.01046.56
8.1.130.0140.01446.79
8.1.120.0270.01546.57
8.1.110.0130.01346.61
8.1.100.0150.01246.47
8.1.90.0100.01646.59
8.1.80.0100.01646.56
8.1.70.0130.01346.59
8.1.60.0220.00746.73
8.1.50.0170.01046.67
8.1.40.0160.01346.62
8.1.30.0070.02146.73
8.1.20.0130.01646.74
8.1.10.0130.02056.89
8.1.00.0140.02056.81
8.0.300.0240.01059.35
8.0.290.0130.02356.29
8.0.280.0070.02757.84
8.0.270.0130.01956.71
8.0.260.0140.02156.25
8.0.250.0130.01956.23
8.0.240.0350.01756.23
8.0.230.0130.01956.18
8.0.220.0160.01656.22
8.0.210.0140.01756.14
8.0.200.0210.01056.16
8.0.190.0160.01656.23
8.0.180.0200.02056.30
8.0.170.0180.01856.22
8.0.160.0100.02356.29
8.0.150.0300.00356.26
8.0.140.0330.01056.11
8.0.130.0100.02152.73
8.0.120.0170.02156.28
8.0.110.0100.02356.09
8.0.100.0200.01356.27
8.0.90.0130.01956.20
8.0.80.0410.03856.22
8.0.70.0100.02156.12
8.0.60.0250.00656.21
8.0.50.0130.02056.23
8.0.30.0550.04056.44
8.0.20.0550.03056.28
8.0.10.0260.00756.16
8.0.00.0500.03556.17
7.4.330.0220.01354.88
7.4.320.0180.01455.74
7.4.300.0230.01055.70
7.4.290.0200.01355.79
7.4.280.0170.01755.88
7.4.270.0110.01855.81
7.4.260.0130.02052.72
7.4.250.0190.01555.76
7.4.240.0190.01355.89
7.4.230.0230.01055.88
7.4.220.0370.04155.92
7.4.210.0350.03355.86
7.4.200.0160.01655.66
7.4.190.0100.02155.98
7.4.160.0330.04355.77
7.4.150.0290.05255.82
7.4.140.0480.03855.86
7.4.130.0360.04455.91
7.4.120.0500.05255.92
7.4.110.0390.04955.85
7.4.100.0290.04855.71
7.4.90.0400.05455.89
7.4.80.0330.04655.94
7.4.70.0560.02055.93
7.4.60.0390.04255.83
7.4.50.0130.01755.99
7.4.40.0360.01655.87
7.4.30.0610.05055.89
7.4.10.0440.02554.21
7.4.00.0340.02254.22
7.3.330.0170.01452.77
7.3.320.0190.01952.59
7.3.310.0250.00955.72
7.3.300.0190.01655.75
7.3.290.0570.02355.70
7.3.280.0500.04355.63
7.3.270.0560.02255.73
7.3.260.0420.04055.73
7.3.250.0540.03655.58
7.3.240.0450.05555.58
7.3.230.0470.03355.83
7.3.210.0520.03655.73
7.3.200.0490.04555.61
7.3.190.0440.03555.63
7.3.180.0520.02855.87
7.3.170.0420.05855.66
7.3.160.0330.04755.89
7.3.130.0460.02754.19
7.3.120.0260.03354.18
7.3.110.0240.03054.45
7.3.100.0260.01754.18
7.3.90.0240.03454.13
7.3.80.0300.02653.99
7.3.70.0240.02854.17
7.3.60.0220.03854.06
7.3.50.0300.02654.15
7.3.40.0240.03253.96
7.3.30.0240.03754.18
7.3.20.0170.02756.44
7.3.10.0260.02756.70
7.3.00.0320.01656.58
7.2.330.0490.03955.92
7.2.320.0440.04155.73
7.2.310.0590.05656.07
7.2.300.0600.02756.05
7.2.290.0430.04355.64
7.2.260.0280.04954.36
7.2.250.0310.02754.37
7.2.240.0190.03954.18
7.2.230.0240.03454.02
7.2.220.0150.04354.12
7.2.210.0190.03954.38
7.2.200.0340.02454.07
7.2.190.0100.04554.25
7.2.180.0230.03354.04
7.2.170.0330.02754.32
7.2.160.0180.03354.33
7.2.150.0160.03056.87
7.2.140.0430.01654.55
7.2.130.0290.01456.56
7.2.120.0250.02656.40
7.2.110.0270.03056.93
7.2.100.0220.02656.85
7.2.90.0040.03456.90
7.2.80.0660.02955.28
7.2.70.0350.02456.37
7.2.60.0230.03056.55
7.2.50.0460.02356.57
7.2.40.0160.02354.54
7.2.30.0270.02156.44
7.2.20.0360.02756.65
7.2.10.0130.04256.68
7.2.00.0210.02253.77
7.1.330.0510.03353.80
7.1.320.0020.04753.82
7.1.310.0160.03153.50
7.1.300.0100.03953.68
7.1.290.0030.04553.78
7.1.280.0100.03953.64
7.1.270.0430.03053.73
7.1.260.0100.03853.71
7.1.250.0200.03353.48
7.1.240.0270.03053.80
7.1.230.0340.03053.38
7.1.220.0160.03753.60
7.1.210.0090.03753.71
7.1.200.0370.02753.62
7.1.190.0270.02753.43
7.1.180.0300.03353.53
7.1.170.0240.04453.65
7.1.160.0350.02253.49
7.1.150.0220.02853.83
7.1.140.0290.03353.36
7.1.130.0230.03353.47
7.1.120.0090.04153.27
7.1.110.0060.04553.65
7.1.100.1840.03151.82
7.1.90.0170.03053.81
7.1.80.0320.03853.74
7.1.70.0290.02054.34
7.1.60.0230.04154.46
7.1.50.0250.04354.40
7.1.40.0160.03653.46
7.1.30.0040.04853.67
7.1.20.0240.03453.66
7.1.10.0290.03753.63
7.1.00.0110.04556.76
7.0.330.0300.03453.52
7.0.320.0270.04253.56
7.0.310.0230.03053.61
7.0.300.0230.03053.77
7.0.290.0060.03453.83
7.0.280.0320.02953.79
7.0.270.0270.02753.80
7.0.260.0230.05053.79
7.0.250.0320.02653.52
7.0.240.0280.02453.66
7.0.230.0200.03753.60
7.0.220.0100.04053.62
7.0.210.0340.03453.44
7.0.200.0840.02654.51
7.0.190.0170.03853.34
7.0.180.0350.03253.63
7.0.170.0270.05053.79
7.0.160.0120.04453.63
7.0.150.0130.04053.84
7.0.140.0190.06456.95
7.0.130.0170.03353.61
7.0.120.0430.03053.52
7.0.110.0210.04553.84
7.0.100.0250.03153.50
7.0.90.3370.06156.65
7.0.80.2670.06356.55
7.0.70.2920.06756.61
7.0.60.2820.07256.77
7.0.50.2930.07556.92
7.0.40.0080.07725.08
7.0.30.0170.06924.99
7.0.20.0230.05724.99
7.0.10.0130.06625.05
7.0.00.0170.06824.99
5.6.400.0060.01826.11
5.6.390.0070.01726.13
5.6.380.0140.01126.34
5.6.370.0120.01226.19
5.6.360.0190.01026.22
5.6.350.0100.01426.05
5.6.340.0140.01026.01
5.6.330.0100.01926.38
5.6.320.0030.01926.38
5.6.310.0110.01426.11
5.6.300.0040.02026.39
5.6.290.0110.01526.42
5.6.280.0090.04629.51
5.6.270.0140.01026.30
5.6.260.0070.01826.46
5.6.250.0070.01526.07
5.6.240.0100.03229.41
5.6.230.0150.04229.26
5.6.220.0150.04529.45
5.6.210.0140.04829.22
5.6.200.0090.02829.58
5.6.190.0100.02729.38
5.6.180.0070.04829.57
5.6.170.0140.04929.55
5.6.160.0140.03829.74
5.6.150.0090.03429.51
5.6.140.0110.04829.54
5.6.130.0160.04129.34
5.6.120.0090.03429.53
5.6.110.0120.04629.51
5.6.100.0210.04329.48
5.6.90.0110.03229.56
5.6.80.0140.04129.20
5.6.70.0190.03829.05
5.6.60.0080.05529.13
5.6.50.0310.09364.42
5.6.40.0270.09364.20
5.6.30.0340.07264.28
5.6.20.0310.07064.23
5.6.10.0220.08264.24
5.6.00.0200.08364.16
5.5.380.0220.08864.17
5.5.370.0250.09064.44
5.5.360.0290.09664.27
5.5.350.0250.10464.14
5.5.340.0230.08564.53
5.5.330.0210.10664.49
5.5.320.0260.10364.30
5.5.310.0270.09564.23
5.5.300.0200.08564.46
5.5.290.0270.08864.46
5.5.280.0300.09564.37
5.5.270.0250.09164.32
5.5.260.0240.09664.50
5.5.250.0240.08964.24
5.5.240.0290.09964.09
5.5.230.0230.09163.94
5.5.220.0270.09264.09
5.5.210.0270.09564.08
5.5.200.0230.10564.13
5.5.190.0280.07164.19
5.5.180.0260.07664.08
5.5.170.0260.08061.21
5.5.160.0240.09564.04
5.5.150.0200.06964.05
5.5.140.0190.07864.15
5.5.130.0270.07764.06
5.5.120.0290.10464.16
5.5.110.0300.06963.89
5.5.100.0290.08163.91
5.5.90.0180.08564.13
5.5.80.0230.06564.01
5.5.70.0150.08264.06
5.5.60.0230.06563.88
5.5.50.0220.06664.10
5.5.40.0300.06363.98
5.5.30.0260.06264.02
5.5.20.0230.08564.07
5.5.10.0280.09463.90
5.5.00.0220.07663.92
5.4.450.0300.07461.78
5.4.440.0230.10361.81
5.4.430.0190.10361.90
5.4.420.0300.09661.86
5.4.410.0220.07061.72
5.4.400.0220.07161.57
5.4.390.0350.09461.72
5.4.380.0360.09161.91
5.4.370.0250.09561.98
5.4.360.0300.09661.92
5.4.350.0240.08161.68
5.4.340.0330.07361.96
5.4.330.0430.07057.82
5.4.320.0220.06861.91
5.4.310.0240.07361.85
5.4.300.0280.07061.86
5.4.290.0280.08061.80
5.4.280.0220.09361.75
5.4.270.0330.09861.79
5.4.260.0320.07861.91
5.4.250.0210.06761.86
5.4.240.0370.06161.96
5.4.230.0180.08161.87
5.4.220.0230.06861.87
5.4.210.0210.08761.98
5.4.200.0200.06961.98
5.4.190.0270.07161.70
5.4.180.0170.08361.94
5.4.170.0220.07861.76
5.4.160.0230.07061.96
5.4.150.0210.08661.75
5.4.140.0270.06260.43
5.4.130.0230.06160.55
5.4.120.0200.07460.49
5.4.110.0220.07260.51
5.4.100.0200.07560.66
5.4.90.0230.08260.65
5.4.80.0210.07360.61
5.4.70.0230.09560.74
5.4.60.0240.08360.63
5.4.50.0220.08260.67
5.4.40.0290.06560.61
5.4.30.0150.07235.70
5.4.20.0150.07635.69
5.4.10.0200.05735.87
5.4.00.0170.06735.40
5.3.290.0080.02013.88
5.3.280.0050.02713.76
5.3.270.0040.02813.74
5.3.260.0070.01913.74
5.3.250.0040.02413.81
5.3.240.0080.02013.78
5.3.230.0060.03113.74
5.3.220.0040.02513.73
5.3.210.0100.03013.74
5.3.200.0050.01713.81
5.3.190.0050.02113.77
5.3.180.0050.02113.75
5.3.170.0080.02113.72
5.3.160.0060.04113.80
5.3.150.0070.04313.82
5.3.140.0040.02413.81
5.3.130.0060.02013.76
5.3.120.0060.03413.78
5.3.110.0090.02213.82
5.3.100.0050.02513.56
5.3.90.0080.03313.48
5.3.80.0030.03113.52
5.3.70.0020.02513.50
5.3.60.0040.02913.44
5.3.50.0000.03613.48
5.3.40.0050.03213.45
5.3.30.0050.03513.45
5.3.20.0070.01913.36
5.3.10.0070.01613.27
5.3.00.0070.03613.32
5.2.170.0070.06011.29
5.2.160.0000.04011.13
5.2.150.0000.03311.00
5.2.140.0100.03011.21
5.2.130.0030.03311.04
5.2.120.0030.03011.01
5.2.110.0030.04311.16
5.2.100.0070.05711.16
5.2.90.0030.04311.20
5.2.80.0000.03310.95
5.2.70.0000.04311.20
5.2.60.0070.04011.15
5.2.50.0030.06010.93
5.2.40.0100.05711.13
5.2.30.0030.03710.98
5.2.20.0070.04711.02
5.2.10.0030.06010.99
5.2.00.0070.04310.66
5.1.60.0030.0539.85
5.1.50.0030.05310.04
5.1.40.0000.0309.96
5.1.30.0070.04710.44
5.1.20.0100.04010.35
5.1.10.0070.04010.14
5.1.00.0070.0509.93
5.0.50.0030.0208.64
5.0.40.0000.0608.64
5.0.30.0070.0638.64
5.0.20.0100.0278.64
5.0.10.0070.0438.64
5.0.00.0030.0678.64
4.4.90.0000.0338.64
4.4.80.0070.0308.64
4.4.70.0000.0308.64
4.4.60.0000.0338.64
4.4.50.0030.0278.64
4.4.40.0000.0308.64
4.4.30.0070.0278.64
4.4.20.0000.0378.64
4.4.10.0000.0238.64
4.4.00.0000.0538.64
4.3.110.0000.0408.64
4.3.100.0030.0338.64
4.3.90.0000.0378.64
4.3.80.0000.0278.64
4.3.70.0000.0338.64
4.3.60.0030.0278.64
4.3.50.0000.0378.64
4.3.40.0100.0378.64
4.3.30.0070.0208.64
4.3.20.0000.0208.64
4.3.10.0000.0378.64
4.3.00.0000.0378.64

preferences:
46.5 ms | 400 KiB | 5 Q