3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); echo $str = json_encode($arr); echo "\n"; echo $str = json_decode((string)$str);

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)
8.3.60.0070.01416.75
8.3.50.0050.01122.05
8.3.40.0110.00418.84
8.3.30.0030.01218.95
8.3.20.0080.00019.93
8.3.10.0090.00023.73
8.3.00.0080.00019.13
8.2.180.0160.00916.50
8.2.170.0120.00922.96
8.2.160.0130.00720.35
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0070.00020.85
8.2.110.0090.00022.06
8.2.100.0000.01217.67
8.2.90.0040.00419.17
8.2.80.0000.00817.97
8.2.70.0060.00317.75
8.2.60.0120.00017.40
8.2.50.0040.00418.07
8.2.40.0040.00419.95
8.2.30.0000.00818.23
8.2.20.0040.00417.64
8.2.10.0000.00717.98
8.2.00.0030.00517.57
8.1.280.0170.00325.92
8.1.270.0000.00823.63
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0040.00423.87
8.1.230.0040.00719.09
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0030.00617.35
8.1.190.0000.00817.23
8.1.180.0040.00418.10
8.1.170.0080.00018.43
8.1.160.0000.00721.93
8.1.150.0060.00318.56
8.1.140.0040.00417.29
8.1.130.0070.00017.82
8.1.120.0030.00317.41
8.1.110.0080.00017.43
8.1.100.0050.00317.37
8.1.90.0000.00717.42
8.1.80.0030.00517.38
8.1.70.0030.00317.30
8.1.60.0030.00517.47
8.1.50.0080.00017.42
8.1.40.0050.00217.46
8.1.30.0050.00317.48
8.1.20.0080.00017.57
8.1.10.0040.00417.49
8.1.00.0040.00417.34
8.0.300.0070.00018.77
8.0.290.0040.00416.93
8.0.280.0000.00718.39
8.0.270.0070.00017.16
8.0.260.0000.00717.24
8.0.250.0000.00716.92
8.0.240.0040.00416.99
8.0.230.0040.00416.91
8.0.220.0000.00716.88
8.0.210.0070.00016.88
8.0.200.0040.00416.98
8.0.190.0030.00516.91
8.0.180.0050.00316.94
8.0.170.0070.00016.98
8.0.160.0040.00416.84
8.0.150.0000.00816.71
8.0.140.0000.00716.75
8.0.130.0000.00613.28
8.0.120.0040.00416.80
8.0.110.0000.00716.86
8.0.100.0050.00216.94
8.0.90.0040.00416.84
8.0.80.0110.00716.88
8.0.70.0050.00316.84
8.0.60.0080.00016.89
8.0.50.0000.00816.73
8.0.30.0100.00817.20
8.0.20.0120.01017.40
8.0.10.0030.00316.86
8.0.00.0120.00516.94
7.4.330.0050.00015.00
7.4.320.0030.00316.45
7.4.300.0000.00616.48
7.4.290.0030.00316.58
7.4.280.0060.00016.41
7.4.270.0000.00716.58
7.4.260.0070.00016.57
7.4.250.0000.00716.52
7.4.240.0030.00416.51
7.4.230.0000.00616.41
7.4.220.0150.01216.41
7.4.210.0090.00516.49
7.4.200.0040.00416.48
7.4.190.0020.00516.35
7.4.160.0080.00816.39
7.4.150.0120.00617.40
7.4.140.0190.01317.86
7.4.130.0100.01016.51
7.4.120.0120.00516.53
7.4.110.0130.00316.39
7.4.100.0060.01216.52
7.4.90.0130.00616.54
7.4.80.0160.00319.39
7.4.70.0060.00916.58
7.4.60.0070.01016.54
7.4.50.0030.00416.30
7.4.40.0080.00816.71
7.4.30.0100.00616.59
7.4.00.0040.01214.96
7.3.330.0000.00513.14
7.3.320.0000.00613.23
7.3.310.0050.00316.05
7.3.300.0040.00216.21
7.3.290.0080.00816.20
7.3.280.0080.01316.23
7.3.270.0070.01617.40
7.3.260.0040.01416.30
7.3.250.0150.00216.37
7.3.240.0120.00916.18
7.3.230.0110.00616.43
7.3.210.0070.01016.28
7.3.200.0090.01219.39
7.3.190.0070.01416.39
7.3.180.0060.01016.36
7.3.170.0100.00716.27
7.3.160.0100.00716.24
7.3.120.0030.00814.74
7.2.330.0100.01316.53
7.2.320.0090.00916.60
7.2.310.0120.00616.39
7.2.300.0090.00616.36
7.2.290.0150.00916.44
7.2.60.0120.00316.03
7.2.00.0030.01319.16
7.1.200.0110.00415.70
7.1.100.0060.01018.35
7.1.70.0090.00617.29
7.1.60.0120.01219.46
7.1.50.0090.00916.71
7.1.00.0070.07322.34
7.0.200.0000.00816.88
7.0.140.0070.07322.02
7.0.90.0030.04319.89
7.0.80.0100.03319.98
7.0.70.0070.03319.87
7.0.60.0000.04320.01
7.0.50.0200.04320.16
7.0.40.0000.04020.18
7.0.30.0070.04019.95
7.0.20.0130.03020.17
7.0.10.0030.04020.09
7.0.00.0000.04720.14
5.6.280.0030.07320.90
5.6.240.0030.04020.66
5.6.230.0100.04720.53
5.6.220.0070.04020.64
5.6.210.0070.03720.39
5.6.200.0070.04021.01
5.6.190.0100.03720.95
5.6.180.0070.04320.95
5.6.170.0070.04021.01
5.6.160.0000.04721.13
5.6.150.0070.03321.05
5.6.140.0100.06320.99
5.6.130.0070.04021.05
5.6.120.0070.07720.99
5.6.110.0100.04021.05
5.6.100.0000.04321.00
5.6.90.0030.05321.00
5.6.80.0070.05320.45
5.6.70.0000.03720.55
5.6.60.0000.05320.29
5.6.50.0030.06720.41
5.6.40.0030.07320.39
5.6.30.0100.05020.39
5.6.20.0030.06320.47
5.6.10.0070.03720.28
5.6.00.0130.07320.26
5.5.380.0130.03320.48
5.5.370.0100.03020.38
5.5.360.0030.03720.50
5.5.350.0030.04020.37
5.5.340.0030.04020.77
5.5.330.0030.04320.75
5.5.320.0030.04020.85
5.5.310.0070.04320.91
5.5.300.0000.04320.86
5.5.290.0030.03720.87
5.5.280.0070.04720.86
5.5.270.0030.04320.86
5.5.260.0070.04020.86
5.5.250.0030.03720.61
5.5.240.0030.08020.14
5.5.230.0100.05720.18
5.5.220.0070.05020.23
5.5.210.0070.07720.09
5.5.200.0030.04020.25
5.5.190.0130.08020.11
5.5.180.0100.07320.11
5.5.160.0100.04320.21
5.5.150.0170.05319.98
5.5.140.0030.04320.22
5.5.130.0070.05720.11
5.5.120.0130.07320.20
5.5.110.0070.05020.24
5.5.100.0170.06720.15
5.5.90.0030.05319.93
5.5.80.0070.06720.06
5.5.70.0100.06020.16
5.5.60.0030.05020.05
5.5.50.0100.07020.12
5.5.40.0070.07320.02
5.5.30.0170.07020.13
5.5.20.0130.06720.04
5.5.10.0170.06320.02
5.5.00.0070.05020.06
5.4.450.0030.04019.47
5.4.440.0000.04319.29
5.4.430.0000.04319.27
5.4.420.0070.03719.32
5.4.410.0030.04019.27
5.4.400.0030.03718.96
5.4.390.0070.08018.97
5.4.380.0170.06019.02
5.4.370.0130.07319.05
5.4.360.0070.05019.04
5.4.350.0130.07318.90
5.4.340.0170.06318.97
5.4.320.0170.03319.09
5.4.310.0130.06718.97
5.4.300.0070.07718.80
5.4.290.0030.07719.04
5.4.280.0130.06719.11
5.4.270.0030.07319.19
5.4.260.0100.04319.22
5.4.250.0130.06018.80
5.4.240.0070.08018.93
5.4.230.0070.05318.80
5.4.220.0030.05718.77
5.4.210.0100.05318.98
5.4.200.0070.05318.93
5.4.190.0100.07319.04
5.4.180.0100.05319.06
5.4.170.0200.06718.95
5.4.160.0130.07319.09
5.4.150.0130.07319.09
5.4.140.0100.07016.01
5.4.130.0000.06316.22
5.4.120.0130.04016.25
5.4.110.0030.04316.26
5.4.100.0070.04716.21
5.4.90.0070.06716.25
5.4.80.0070.04316.42
5.4.70.0070.07316.24
5.4.60.0170.06316.42
5.4.50.0100.06716.26
5.4.40.0100.03716.47
5.4.30.0030.08016.29
5.4.20.0100.05316.32
5.4.10.0100.06716.23
5.4.00.0030.08015.66
5.3.290.0000.04714.52
5.3.280.0000.07314.44
5.3.270.0070.08014.60
5.3.260.0070.07314.43
5.3.250.0000.06314.58
5.3.240.0030.04714.58
5.3.230.0070.08014.56
5.3.220.0100.05714.55
5.3.210.0070.07314.53
5.3.200.0100.07714.51
5.3.190.0030.04714.53
5.3.180.0070.05714.55
5.3.170.0130.04014.56
5.3.160.0030.08014.57
5.3.150.0070.04314.47
5.3.140.0070.07714.50
5.3.130.0100.07314.40
5.3.120.0000.07314.45
5.3.110.0070.07714.50
5.3.100.0070.07013.94
5.3.90.0070.04013.97
5.3.80.0070.07313.87
5.3.70.0070.07313.87
5.3.60.0000.04713.98
5.3.50.0030.05013.93
5.3.40.0070.07713.80
5.3.30.0100.07013.89
5.3.20.0030.04713.54
5.3.10.0070.06313.63
5.3.00.0070.06713.62
5.2.170.0070.02710.97
5.2.160.0070.02711.18
5.2.150.0070.06011.16
5.2.140.0070.06311.05
5.2.130.0070.05711.13
5.2.120.0030.05710.96
5.2.110.0130.05310.93
5.2.100.0030.06311.09
5.2.90.0030.05010.94
5.2.80.0030.04011.09
5.2.70.0100.05711.07
5.2.60.0100.05311.04
5.2.50.0000.03310.99
5.2.40.0130.05010.98
5.2.30.0000.03310.79
5.2.20.0030.06010.84
5.2.10.0070.06010.78
5.2.00.0100.05310.62
5.1.60.0030.05310.01
5.1.50.0070.0539.97
5.1.40.0100.0339.81
5.1.30.0100.05010.38
5.1.20.0130.04310.27
5.1.10.0070.05310.11
5.1.00.0070.05010.04
5.0.50.0000.0278.54
5.0.40.0000.0478.46
5.0.30.0000.0678.22
5.0.20.0030.0208.27
5.0.10.0000.0208.19
5.0.00.0000.0738.23
4.4.90.0070.0135.79
4.4.80.0000.0205.82
4.4.70.0030.0335.80
4.4.60.0030.0235.75
4.4.50.0030.0375.81
4.4.40.0000.0405.82
4.4.30.0000.0335.72
4.4.20.0000.0375.80
4.4.10.0070.0205.79
4.4.00.0030.0405.77
4.3.110.0030.0335.68
4.3.100.0100.0275.74
4.3.90.0030.0135.65
4.3.80.0030.0505.69
4.3.70.0030.0235.65
4.3.60.0030.0175.73
4.3.50.0030.0335.65
4.3.40.0000.0475.71
4.3.30.0000.0375.65
4.3.20.0030.0275.65
4.3.10.0000.0305.65
4.3.00.0000.0275.65

preferences:
37.71 ms | 400 KiB | 5 Q