3v4l.org

run code in 300+ PHP versions simultaneously
<?php function flatten($arr) { $result = []; foreach ($arr as $key => $value) { if (is_array($value)) { foreach (flatten($value) as $subKey => $scalar) { $result[$key . ':' . $subKey] = $scalar; } } else if (is_scalar($value)) { $result[$key] = $value; } } return $result; } var_dump(['foo' => 123, 'bar' => 456]); var_dump(['foo' => ['bar' => 123, 'baz' => 456]]);

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)
8.3.60.0070.00716.75
8.3.50.0240.00821.87
8.3.40.0070.01418.56
8.3.30.0000.01519.09
8.3.20.0040.00420.39
8.3.10.0020.00523.60
8.3.00.0000.00822.57
8.2.180.0040.01516.38
8.2.170.0070.00722.96
8.2.160.0070.01022.08
8.2.150.0050.00324.18
8.2.140.0030.00524.66
8.2.130.0080.00026.16
8.2.120.0040.00422.04
8.2.110.0050.00521.00
8.2.100.0040.00817.72
8.2.90.0030.00519.00
8.2.80.0000.00817.97
8.2.70.0040.00417.38
8.2.60.0030.00517.68
8.2.50.0000.00818.10
8.2.40.0050.00320.64
8.2.30.0000.00717.94
8.2.20.0000.00717.55
8.2.10.0050.00319.32
8.2.00.0040.00417.46
8.1.280.0150.00025.92
8.1.270.0030.00524.66
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0030.00622.30
8.1.230.0090.00317.70
8.1.220.0030.00517.74
8.1.210.0100.00018.77
8.1.200.0000.00817.23
8.1.190.0030.00617.10
8.1.180.0030.00518.10
8.1.170.0040.00418.50
8.1.160.0040.00422.07
8.1.150.0040.00418.43
8.1.140.0040.00417.20
8.1.130.0000.00717.67
8.1.120.0040.00417.36
8.1.110.0030.00517.34
8.1.100.0040.00417.38
8.1.90.0050.00517.20
8.1.80.0070.00017.27
8.1.70.0040.00417.32
8.1.60.0030.00517.46
8.1.50.0000.00717.43
8.1.40.0060.00317.26
8.1.30.0080.00017.40
8.1.20.0040.00417.54
8.1.10.0000.00717.29
8.1.00.0030.00617.33
8.0.300.0050.00419.66
8.0.290.0050.00316.63
8.0.280.0030.00518.29
8.0.270.0030.00317.13
8.0.260.0070.00016.60
8.0.250.0040.00416.84
8.0.240.0000.00716.78
8.0.230.0000.00716.75
8.0.220.0000.00716.75
8.0.210.0090.00016.76
8.0.200.0000.00816.79
8.0.190.0050.00316.75
8.0.180.0000.00716.80
8.0.170.0040.00416.82
8.0.160.0000.00816.68
8.0.150.0040.00316.62
8.0.140.0000.00716.73
8.0.130.0000.00513.15
8.0.120.0000.00716.63
8.0.110.0070.00016.76
8.0.100.0040.00416.59
8.0.90.0000.00716.77
8.0.80.0130.00616.69
8.0.70.0040.00416.77
8.0.60.0050.00216.59
8.0.50.0000.00716.71
8.0.30.0080.01116.80
8.0.20.0130.00917.40
8.0.10.0050.00316.92
8.0.00.0110.01116.62
7.4.330.0000.00515.03
7.4.320.0030.00316.38
7.4.300.0030.00316.26
7.4.290.0000.00716.36
7.4.280.0030.00616.46
7.4.270.0060.00316.51
7.4.260.0040.00416.50
7.4.250.0000.00716.27
7.4.240.0040.00316.36
7.4.230.0000.00716.46
7.4.220.0120.00616.50
7.4.210.0090.00616.44
7.4.200.0040.00416.21
7.4.190.0030.00316.55
7.4.160.0060.01116.24
7.4.150.0030.01517.40
7.4.140.0100.00817.86
7.4.130.0080.01016.43
7.4.120.0060.01216.33
7.4.110.0070.01016.46
7.4.100.0130.01016.29
7.4.90.0030.01416.27
7.4.80.0130.00719.37
7.4.70.0110.00516.22
7.4.60.0080.00816.14
7.4.50.0060.00316.36
7.4.40.0090.00322.77
7.4.30.0090.00916.17
7.4.00.0030.01014.73
7.3.330.0050.00213.04
7.3.320.0050.00013.20
7.3.310.0000.00716.08
7.3.300.0000.00716.10
7.3.290.0090.00616.18
7.3.280.0070.01216.16
7.3.270.0040.01417.40
7.3.260.0170.00016.18
7.3.250.0110.00916.33
7.3.240.0130.00416.48
7.3.230.0070.01016.39
7.3.210.0100.01316.44
7.3.200.0130.01019.39
7.3.190.0130.01016.30
7.3.180.0140.00716.14
7.3.170.0040.01116.27
7.3.160.0150.00616.27
7.3.120.0100.00614.47
7.3.10.0050.01016.28
7.3.00.0080.00516.37
7.2.330.0120.00616.28
7.2.320.0120.00916.59
7.2.310.0080.00916.30
7.2.300.0090.00916.18
7.2.290.0110.00616.52
7.2.130.0030.01316.41
7.2.120.0000.01216.27
7.2.110.0040.00716.30
7.2.100.0070.00716.46
7.2.90.0080.00316.63
7.2.80.0080.00416.62
7.2.70.0000.01216.89
7.2.60.0040.01116.62
7.2.50.0070.00716.31
7.2.40.0030.00916.50
7.2.30.0080.00816.17
7.2.20.0040.00816.46
7.2.10.0040.00816.36
7.2.00.0020.00817.83
7.1.250.0020.00715.66
7.1.100.0040.00718.16
7.1.70.0070.00317.06
7.1.60.0070.01719.29
7.1.50.0250.01116.82
7.1.00.0030.07322.45
7.0.200.0080.00816.66
7.0.140.0100.06721.96
7.0.60.0130.03321.66
7.0.50.0100.07017.89
7.0.40.0100.08720.27
7.0.30.0500.07020.06
7.0.20.0330.07320.16
7.0.10.0130.07720.09
7.0.00.0030.09020.23
5.6.280.0070.07021.10
5.6.210.0100.08020.53
5.6.200.0000.05318.16
5.6.190.0100.08020.62
5.6.180.0370.03720.41
5.6.170.0330.07320.71
5.6.160.0070.05020.43
5.6.150.0070.04718.19
5.6.140.0100.04018.19
5.6.130.0100.05018.28
5.6.120.0170.07020.90
5.6.110.0070.05320.99
5.6.100.0100.04321.11
5.6.90.0100.08020.98
5.6.80.0000.08720.39
5.5.350.0170.05320.53
5.5.340.0070.08317.99
5.5.330.0030.05320.15
5.5.320.0330.05020.52
5.5.310.0170.04020.38
5.5.300.0070.05017.95
5.5.290.0130.07718.04
5.5.280.0100.06720.96
5.5.270.0000.04320.80
5.5.260.0030.06320.80
5.5.250.0000.09020.59
5.5.240.0130.07320.19
5.4.450.3030.04319.48
5.4.440.3430.03719.55
5.4.430.0000.04019.54
5.4.420.3830.04319.45
5.4.410.4100.03719.34
5.4.400.3900.03319.27
5.4.390.3970.04319.26
5.4.380.4600.03019.04
5.4.370.4030.03019.13
5.4.360.3700.04318.93
5.4.350.3970.03319.14
5.4.340.3930.03719.11
5.4.320.3630.03319.22
5.4.310.3700.04318.98
5.4.300.3930.03319.22
5.4.290.3800.03719.09
5.4.280.3770.04319.13
5.4.270.3930.03319.10
5.4.260.4000.04019.13
5.4.250.4730.03019.09
5.4.240.3570.03318.93
5.4.230.3700.04318.98
5.4.220.4330.04019.16
5.4.210.4200.04319.05
5.4.200.4330.03319.06
5.4.190.4770.03718.94
5.4.180.4100.03719.21
5.4.170.4730.04319.10
5.4.160.3570.03719.24
5.4.150.3900.03319.04
5.4.140.3670.03716.46
5.4.130.4170.03316.34
5.4.120.3830.03716.28
5.4.110.4430.03316.45
5.4.100.4370.03716.52
5.4.90.4530.03316.45
5.4.80.4100.03316.24
5.4.70.3930.03716.24
5.4.60.3770.03016.33
5.4.50.3900.03316.23
5.4.40.3830.04016.42
5.4.30.3770.03016.32
5.4.20.3700.03316.41
5.4.10.3670.03316.50
5.4.00.3630.03715.84
5.3.290.3930.03714.72
5.3.280.3830.03014.67
5.3.270.3870.04314.61
5.3.260.3870.03714.63
5.3.250.3930.03714.67
5.3.240.3670.03014.53
5.3.230.3930.03714.60
5.3.220.3700.03714.56
5.3.210.3600.03714.59
5.3.200.4470.03314.52
5.3.190.3930.03714.59
5.3.180.3600.03714.61
5.3.170.3670.03714.57
5.3.160.3770.03714.45
5.3.150.3530.03714.57
5.3.140.3800.03314.61
5.3.130.3870.04014.57
5.3.120.3970.04014.58
5.3.110.3930.04014.55
5.3.100.3400.03314.07
5.3.90.2400.02314.02
5.3.80.1900.04014.08
5.3.70.3270.03314.05
5.3.60.3530.04314.02
5.3.50.3830.03013.95
5.3.40.3730.03713.98
5.3.30.3200.04313.91
5.3.20.3600.03313.76
5.3.10.3630.04313.62
5.3.00.1700.03313.58
5.2.170.3100.02711.20
5.2.160.3300.02711.30
5.2.150.3270.03311.09
5.2.140.3130.03311.03
5.2.130.2370.02011.25
5.2.120.3000.03011.15
5.2.110.2730.02711.13
5.2.100.0030.03011.14
5.2.90.0000.03311.11
5.2.80.0030.02710.97
5.2.70.1300.02311.06
5.2.60.3600.03010.93
5.2.50.3300.02311.01
5.2.40.2430.02710.99
5.2.30.2670.02710.96
5.2.20.2430.03010.92
5.2.10.2870.02710.94
5.2.00.2770.03310.86
5.1.60.2770.02710.13
5.1.50.2630.02710.04
5.1.40.2570.0179.99
5.1.30.2830.02710.36
5.1.20.2670.03010.39
5.1.10.2430.02310.02
5.1.00.2370.0279.97
5.0.50.1500.0208.54
5.0.40.1300.0178.46
5.0.30.1370.0338.27
5.0.20.1430.0208.34
5.0.10.1470.0278.07
5.0.00.1430.0378.18
4.4.90.0970.0176.48
4.4.80.1200.0136.48
4.4.70.1270.0136.48
4.4.60.1230.0206.48
4.4.50.0870.0136.48
4.4.40.1370.0276.48
4.4.30.1500.0176.48
4.4.20.1470.0176.48
4.4.10.1370.0176.48
4.4.00.1270.0276.48
4.3.110.1570.0236.48
4.3.100.1430.0206.48
4.3.90.1370.0206.48
4.3.80.0600.0236.48
4.3.70.0070.0176.48
4.3.60.0000.0406.48
4.3.50.0100.0236.48
4.3.40.0000.0506.48
4.3.30.0030.0236.48
4.3.20.0070.0306.48
4.3.10.0000.0276.48
4.3.00.0030.0206.48

preferences:
43.21 ms | 401 KiB | 5 Q