3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "this is a string"; var_dump(json_encode($string));

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)
8.3.40.0100.00718.50
8.3.30.0110.00418.88
8.3.20.0020.00520.29
8.3.10.0050.00223.62
8.3.00.0040.00418.99
8.2.170.0060.00922.96
8.2.160.0090.00620.35
8.2.150.0070.00024.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0080.00020.75
8.2.110.0040.00422.21
8.2.100.0090.00317.78
8.2.90.0030.00519.23
8.2.80.0080.00017.97
8.2.70.0030.00617.63
8.2.60.0050.00317.91
8.2.50.0100.00018.07
8.2.40.0000.00819.83
8.2.30.0040.00418.05
8.2.20.0070.00017.69
8.2.10.0050.00318.04
8.2.00.0070.00017.65
8.1.270.0050.00323.96
8.1.260.0040.00426.35
8.1.250.0110.00728.09
8.1.240.0000.00822.07
8.1.230.0080.00419.11
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.22
8.1.190.0000.00817.00
8.1.180.0030.00618.10
8.1.170.0040.00418.48
8.1.160.0030.00521.84
8.1.150.0050.00218.56
8.1.140.0060.00317.28
8.1.130.0000.00717.87
8.1.120.0040.00417.39
8.1.110.0000.00717.36
8.1.100.0070.00017.28
8.1.90.0050.00217.43
8.1.80.0080.00017.35
8.1.70.0000.00717.36
8.1.60.0060.00317.50
8.1.50.0030.00617.31
8.1.40.0080.00017.36
8.1.30.0040.00417.57
8.1.20.0040.00417.52
8.1.10.0070.00017.43
8.1.00.0040.00417.29
8.0.300.0000.00718.77
8.0.290.0070.00017.16
8.0.280.0000.00718.35
8.0.270.0000.00717.17
8.0.260.0040.00417.22
8.0.250.0050.00316.87
8.0.240.0030.00316.77
8.0.230.0060.00316.92
8.0.220.0000.00716.77
8.0.210.0000.00716.72
8.0.200.0000.00716.85
8.0.190.0030.00316.91
8.0.180.0030.00516.83
8.0.170.0000.00716.90
8.0.160.0000.00716.66
8.0.150.0040.00416.75
8.0.140.0040.00416.63
8.0.130.0060.00013.20
8.0.120.0000.00816.82
8.0.110.0040.00416.72
8.0.100.0050.00216.71
8.0.90.0030.00316.77
8.0.80.0110.00616.73
8.0.70.0000.00716.77
8.0.60.0040.00416.86
8.0.50.0000.00716.59
8.0.30.0130.00816.95
8.0.20.0130.00817.40
8.0.10.0040.00416.89
8.0.00.0100.00816.65
7.4.330.0030.00315.00
7.4.320.0000.00616.41
7.4.300.0030.00316.47
7.4.290.0030.00316.33
7.4.280.0000.00716.51
7.4.270.0000.00716.51
7.4.260.0000.00716.39
7.4.250.0030.00316.47
7.4.240.0010.00616.43
7.4.230.0000.00716.44
7.4.220.0060.01216.51
7.4.210.0100.00416.46
7.4.200.0050.00216.22
7.4.190.0000.00716.68
7.4.160.0120.00316.46
7.4.150.0150.00917.40
7.4.140.0080.00917.86
7.4.130.0090.00916.53
7.4.120.0080.00816.33
7.4.110.0040.01916.33
7.4.100.0070.01016.47
7.4.90.0070.01016.36
7.4.80.0060.01319.39
7.4.70.0100.01316.24
7.4.60.0230.01216.52
7.4.50.0000.00416.20
7.4.40.0120.00416.53
7.4.30.0090.00616.33
7.4.00.0060.00614.77
7.3.330.0060.00013.05
7.3.320.0060.00012.92
7.3.310.0000.00716.12
7.3.300.0020.00515.95
7.3.290.0070.01016.09
7.3.280.0090.00816.12
7.3.270.0130.00317.40
7.3.260.0070.01116.29
7.3.250.0100.00716.20
7.3.240.0040.01216.54
7.3.230.0030.01316.39
7.3.210.0070.01016.11
7.3.200.0130.00919.39
7.3.190.0070.01016.41
7.3.180.0140.00316.17
7.3.170.0170.00616.36
7.3.160.0120.00316.19
7.3.120.0030.01314.79
7.3.110.0060.01014.46
7.3.100.0030.01314.88
7.3.90.0030.00814.54
7.3.80.0040.01014.54
7.3.70.0070.00714.74
7.3.60.0050.00514.81
7.3.50.0070.00414.61
7.3.40.0070.00714.73
7.3.30.0090.00014.77
7.3.20.0030.01016.27
7.3.10.0030.01016.52
7.3.00.0110.00416.39
7.2.330.0070.01116.26
7.2.320.0090.00916.54
7.2.310.0040.01616.31
7.2.300.0000.01716.22
7.2.290.0090.00916.54
7.2.240.0030.01315.07
7.2.230.0100.00714.98
7.2.220.0060.00914.76
7.2.210.0040.01414.66
7.2.200.0090.00014.73
7.2.190.0000.01614.73
7.2.180.0070.00714.93
7.2.170.0030.01114.82
7.2.160.0030.01014.72
7.2.150.0100.00716.91
7.2.140.0090.00616.86
7.2.130.0030.01016.68
7.2.120.0030.01416.60
7.2.110.0040.00816.68
7.2.100.0020.01316.76
7.2.90.0030.01016.70
7.2.80.0070.01116.59
7.2.70.0070.01016.68
7.2.60.0060.00616.66
7.2.50.0060.01016.76
7.2.40.0100.00716.78
7.2.30.0060.00616.78
7.2.20.0060.01216.95
7.2.10.0100.00616.79
7.2.00.0050.00517.86
7.1.330.0030.01015.71
7.1.320.0040.01215.55
7.1.310.0000.01115.55
7.1.300.0030.01315.71
7.1.290.0080.00515.45
7.1.280.0040.01215.77
7.1.270.0040.01115.94
7.1.260.0060.00915.48
7.1.250.0030.01015.70
7.1.100.0060.00618.19
7.1.70.0030.00716.89
7.1.60.0030.01619.46
7.1.50.0200.01034.54
7.1.00.0030.07722.48
7.0.200.0050.00216.67
7.0.140.0030.07322.12
7.0.90.0230.02020.02
7.0.80.0030.04319.85
7.0.70.0030.04319.91
7.0.60.0070.04320.06
7.0.50.0730.07020.16
7.0.40.0130.05020.17
7.0.30.0070.05320.17
7.0.20.0030.07320.18
7.0.10.0130.07720.14
7.0.00.0070.07720.07
5.6.280.0100.06721.11
5.6.240.0200.05720.72
5.6.230.0030.04020.60
5.6.220.0100.03020.73
5.6.210.0000.04720.68
5.6.200.0070.07021.16
5.6.190.0070.08321.04
5.6.180.0030.08721.01
5.6.170.0070.07321.04
5.6.160.0030.05021.04
5.6.150.0070.08321.13
5.6.140.0070.08021.03
5.6.130.0000.06020.95
5.6.120.0100.07721.04
5.6.110.0070.04720.93
5.6.100.0070.04320.98
5.6.90.0170.06720.93
5.6.80.0100.05020.33
5.6.70.0100.07720.41
5.6.60.0070.06020.53
5.6.50.0100.07720.48
5.6.40.0100.08320.36
5.6.30.0170.06720.52
5.6.20.0130.07720.35
5.6.10.0070.05720.35
5.6.00.0030.08320.35
5.5.380.0000.04320.51
5.5.370.0000.04320.50
5.5.360.0070.04020.48
5.5.350.0070.04320.45
5.5.340.0070.06020.92
5.5.330.0070.08020.73
5.5.320.0070.06320.87
5.5.310.0070.07720.78
5.5.300.0100.08020.89
5.5.290.0070.08320.82
5.5.280.0070.04320.75
5.5.270.0130.04020.86
5.5.260.0070.05320.77
5.5.250.0070.04720.66
5.5.240.0070.05320.11
5.5.230.0070.08320.10
5.5.220.0030.08320.23
5.5.210.0030.08320.20
5.5.200.0100.07720.27
5.5.190.0100.08019.98
5.5.180.0070.06020.14
5.5.160.0130.05720.21
5.5.150.0100.08320.09
5.5.140.0070.08320.12
5.5.130.0070.04720.17
5.5.120.0030.08020.21
5.5.110.0200.06720.16
5.5.100.0100.04720.10
5.5.90.0070.03720.05
5.5.80.0070.07320.03
5.5.70.0000.04719.99
5.5.60.0070.05720.13
5.5.50.0000.05720.14
5.5.40.0170.06320.15
5.5.30.0170.06319.91
5.5.20.0130.04720.14
5.5.10.0030.08320.01
5.5.00.0100.07320.02
5.4.450.0000.08319.58
5.4.440.0000.04719.13
5.4.430.0070.06319.39
5.4.420.0070.07019.35
5.4.410.0230.06718.98
5.4.400.0030.08019.07
5.4.390.0170.04318.94
5.4.380.0070.07719.03
5.4.370.0100.07719.11
5.4.360.0000.08019.09
5.4.350.0130.06019.07
5.4.340.0000.04319.04
5.4.320.0100.08018.95
5.4.310.0070.08318.96
5.4.300.0000.06319.07
5.4.290.0000.07718.89
5.4.280.0030.04319.03
5.4.270.0100.04019.05
5.4.260.0030.09319.23
5.4.250.0100.04319.04
5.4.240.0100.06719.05
5.4.230.0170.06318.94
5.4.220.0030.08018.93
5.4.210.0070.07319.05
5.4.200.0170.05318.89
5.4.190.0100.07719.03
5.4.180.0070.07719.04
5.4.170.0030.04319.11
5.4.160.0100.07718.94
5.4.150.0070.08018.94
5.4.140.0100.07016.34
5.4.130.0100.04716.31
5.4.120.0070.04316.23
5.4.110.0070.06316.27
5.4.100.0130.06316.26
5.4.90.0070.04716.45
5.4.80.0070.04716.19
5.4.70.0170.05316.31
5.4.60.0070.07016.38
5.4.50.0070.06016.27
5.4.40.0070.06716.45
5.4.30.0070.04316.39
5.4.20.0130.07016.39
5.4.10.0030.08016.34
5.4.00.0100.04315.72
5.3.290.0070.08014.65
5.3.280.0030.04314.50
5.3.270.0000.06714.59
5.3.260.0070.05314.51
5.3.250.0070.06314.59
5.3.240.0100.07714.46
5.3.230.0130.06314.52
5.3.220.0130.05714.42
5.3.210.0100.07014.55
5.3.200.0070.06314.55
5.3.190.0100.06314.42
5.3.180.0070.07314.56
5.3.170.0070.07314.42
5.3.160.0000.06314.54
5.3.150.0070.05314.42
5.3.140.0070.07714.51
5.3.130.0070.04314.53
5.3.120.0030.04314.50
5.3.110.0070.07714.54
5.3.100.0130.06713.85
5.3.90.0070.06013.87
5.3.80.0070.07013.95
5.3.70.0100.07314.00
5.3.60.0170.05313.95
5.3.50.0130.06713.95
5.3.40.0030.05013.94
5.3.30.0100.07313.84
5.3.20.0000.06013.64
5.3.10.0030.07313.64
5.3.00.0200.05013.54
5.2.170.0070.06310.93
5.2.160.0070.04310.96
5.2.150.0030.06311.19
5.2.140.0070.06311.20
5.2.130.0070.04711.09
5.2.120.0030.06711.02
5.2.110.0070.05011.09
5.2.100.0070.05310.96
5.2.90.0070.05710.89
5.2.80.0030.04711.10
5.2.70.0070.04311.15
5.2.60.0100.05710.96
5.2.50.0030.06310.82
5.2.40.0070.06710.94
5.2.30.0130.05710.95
5.2.20.0070.04011.00
5.2.10.0030.03010.90
5.2.00.0100.05310.76
5.1.60.0030.05010.02
5.1.50.0070.03710.01
5.1.40.0030.04310.00
5.1.30.0030.05710.33
5.1.20.0030.05710.20
5.1.10.0030.05310.08
5.1.00.0070.05310.05
5.0.50.0030.0338.42
5.0.40.0000.0438.46
5.0.30.0070.0408.25
5.0.20.0030.0378.18
5.0.10.0070.0338.16
5.0.00.0000.0738.14
4.4.90.0000.0237.41
4.4.80.0000.0377.41
4.4.70.0030.0377.41
4.4.60.0070.0207.41
4.4.50.0030.0237.41
4.4.40.0000.0407.41
4.4.30.0000.0377.41
4.4.20.0000.0377.41
4.4.10.0030.0337.41
4.4.00.0000.0407.41
4.3.110.0030.0377.41
4.3.100.0030.0337.41
4.3.90.0030.0377.41
4.3.80.0070.0537.41
4.3.70.0000.0307.41
4.3.60.0030.0237.41
4.3.50.0000.0237.41
4.3.40.0000.0277.41
4.3.30.0030.0337.41
4.3.20.0070.0237.41
4.3.10.0030.0377.41
4.3.00.0000.0377.41

preferences:
41.41 ms | 400 KiB | 5 Q