3v4l.org

run code in 300+ PHP versions simultaneously
<?php function func(&$arraykey) { return $arraykey; // function returns by value! } $array = array('a', 'b', 'c'); foreach (array_keys($array) as $key) { $y = &func($array[$key]); $z[] =& $y; } var_dump($z); ?>

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)
8.3.60.0070.01416.63
8.3.50.0170.00322.00
8.3.40.0070.01118.67
8.3.30.0110.00319.02
8.3.20.0000.00720.39
8.3.10.0050.00523.51
8.3.00.0040.00421.02
8.2.180.0090.00916.50
8.2.170.0170.00322.96
8.2.160.0080.00520.30
8.2.150.0080.00024.18
8.2.140.0030.00524.66
8.2.130.0040.00826.16
8.2.120.0040.00420.67
8.2.110.0070.00322.17
8.2.100.0040.00817.90
8.2.90.0090.00018.02
8.2.80.0080.00018.05
8.2.70.0030.00617.75
8.2.60.0050.00317.63
8.2.50.0060.00317.93
8.2.40.0040.00419.48
8.2.30.0000.00718.21
8.2.20.0030.00617.71
8.2.10.0000.00718.00
8.2.00.0040.00417.72
8.1.280.0040.01125.92
8.1.270.0030.00622.05
8.1.260.0090.00026.35
8.1.250.0070.00028.09
8.1.240.0000.00922.00
8.1.230.0040.00820.90
8.1.220.0080.00017.91
8.1.210.0060.00318.77
8.1.200.0090.00017.41
8.1.190.0030.00617.23
8.1.180.0030.00518.10
8.1.170.0040.00417.62
8.1.160.0000.00722.05
8.1.150.0000.00718.52
8.1.140.0000.00717.38
8.1.130.0000.00717.81
8.1.120.0020.00517.43
8.1.110.0000.00817.37
8.1.100.0080.00017.34
8.1.90.0030.00517.36
8.1.80.0040.00417.52
8.1.70.0000.00717.38
8.1.60.0000.00817.57
8.1.50.0040.00417.54
8.1.40.0030.00517.52
8.1.30.0030.00617.48
8.1.20.0080.00017.63
8.1.10.0030.00617.49
8.1.00.0040.00417.46
8.0.300.0040.00420.14
8.0.290.0070.00016.75
8.0.280.0000.00818.36
8.0.270.0070.00016.89
8.0.260.0030.00317.29
8.0.250.0030.00317.03
8.0.240.0000.00716.95
8.0.230.0080.00017.06
8.0.220.0040.00416.87
8.0.210.0070.00016.88
8.0.200.0000.00717.03
8.0.190.0030.00317.03
8.0.180.0050.00216.98
8.0.170.0030.00616.96
8.0.160.0040.00316.85
8.0.150.0030.00416.95
8.0.140.0040.00416.80
8.0.130.0030.00313.35
8.0.120.0040.00416.93
8.0.110.0070.00016.84
8.0.100.0080.00016.93
8.0.90.0040.00417.00
8.0.80.0040.01116.97
8.0.70.0080.00016.77
8.0.60.0050.00216.93
8.0.50.0040.00416.86
8.0.30.0170.00517.06
8.0.20.0140.00517.40
8.0.10.0040.00416.95
8.0.00.0130.00916.80
7.4.330.0050.00015.10
7.4.320.0060.00016.46
7.4.300.0000.00616.40
7.4.290.0000.00716.43
7.4.280.0060.00316.59
7.4.270.0000.00816.43
7.4.260.0060.00316.48
7.4.250.0040.00416.42
7.4.240.0020.00516.57
7.4.230.0070.00016.58
7.4.220.0120.00616.67
7.4.210.0030.01416.60
7.4.200.0040.00416.58
7.4.160.0080.00816.54
7.4.150.0060.01117.40
7.4.140.0050.01217.86
7.4.130.0060.01116.48
7.4.120.0110.00516.53
7.4.110.0090.00916.52
7.4.100.0150.00816.70
7.4.90.0040.01316.39
7.4.80.0110.01019.39
7.4.70.0090.00916.45
7.4.60.0040.01516.59
7.4.50.0040.00016.29
7.4.40.0120.00616.50
7.4.30.0070.01316.31
7.4.00.0040.01115.05
7.3.330.0070.00013.20
7.3.320.0030.00313.35
7.3.310.0080.00016.14
7.3.300.0050.00316.25
7.3.290.0160.00316.30
7.3.280.0090.00816.35
7.3.270.0100.01417.40
7.3.260.0140.00316.26
7.3.250.0110.00916.48
7.3.240.0120.00716.35
7.3.230.0120.00816.51
7.3.210.0100.01316.39
7.3.200.0040.01219.39
7.3.190.0140.00416.57
7.3.180.0030.01316.61
7.3.170.0100.00716.46
7.3.160.0080.00816.45
7.3.120.0080.00814.83
7.3.110.0100.00714.85
7.3.100.0100.00614.70
7.3.90.0070.00914.82
7.3.80.0020.01014.87
7.3.70.0060.00714.81
7.3.60.0020.01314.62
7.3.50.0030.00914.86
7.3.40.0020.01014.63
7.3.30.0060.00914.83
7.3.20.0050.00516.65
7.3.10.0070.00516.52
7.3.00.0040.00916.67
7.2.330.0100.01316.64
7.2.320.0080.00816.43
7.2.310.0060.01016.78
7.2.300.0080.00816.71
7.2.290.0110.00716.45
7.2.250.0060.01015.04
7.2.240.0100.01014.86
7.2.230.0040.01114.91
7.2.220.0050.01215.07
7.2.210.0040.00914.96
7.2.200.0050.00714.91
7.2.190.0120.00415.04
7.2.180.0070.00714.98
7.2.170.0050.01114.75
7.2.60.0030.01016.73
7.2.00.0070.00719.44
7.1.330.0060.00815.78
7.1.320.0070.00415.74
7.1.310.0090.00715.88
7.1.300.0050.00815.71
7.1.290.0030.00915.72
7.1.280.0100.00515.73
7.1.270.0070.00615.77
7.1.260.0060.00615.79
7.1.200.0030.01015.79
7.1.70.0000.00717.13
7.1.60.0100.00317.17
7.1.50.0040.01816.79
7.1.00.0070.07322.37
7.0.200.0120.00316.74
7.0.140.0030.07022.00
7.0.60.0100.07319.93
7.0.50.0070.03717.88
7.0.40.0030.07020.23
7.0.30.0230.04320.06
7.0.20.0230.09020.28
7.0.10.0300.08020.07
7.0.00.0070.08720.08
5.6.280.0070.07021.11
5.6.210.0100.08320.64
5.6.200.0070.03718.19
5.6.190.0130.08720.49
5.6.180.0230.04320.58
5.6.170.0270.04720.44
5.6.160.0100.08020.50
5.6.150.0000.04318.23
5.6.140.0070.05018.20
5.6.130.0030.08318.25
5.6.120.0030.05321.03
5.6.110.0070.08721.12
5.6.100.0100.05021.12
5.6.90.0070.08721.02
5.6.80.0070.07020.45
5.6.70.0130.03320.50
5.5.350.0100.08020.44
5.5.340.0170.04317.93
5.5.330.0030.05320.07
5.5.320.0130.07020.57
5.5.310.0270.05020.36
5.5.300.0100.07018.07
5.5.290.0030.04017.97
5.5.280.0200.07020.80
5.5.270.0130.04320.83
5.5.260.0070.07720.86
5.5.250.0100.08020.69
5.5.240.0130.03320.37
5.4.450.3900.03019.27
5.4.440.3470.03319.30
5.4.430.3530.04719.17
5.4.420.3530.03319.40
5.4.410.3670.03319.17
5.4.400.4100.03719.18
5.4.390.3770.03719.22
5.4.380.3970.04319.10
5.4.370.3370.03719.09
5.4.360.3630.04719.22
5.4.350.3530.03319.06
5.4.340.4030.03719.06
5.4.320.3870.03319.15
5.4.310.3870.04019.06
5.4.300.3870.04019.22
5.4.290.3430.04019.14
5.4.280.3530.03318.87
5.4.270.3270.04019.05
5.4.260.3730.03719.15
5.4.250.3130.03718.98
5.4.240.3470.03719.13
5.4.230.3570.04319.15
5.4.220.3000.03019.22
5.4.210.3000.03719.21
5.4.200.2870.03719.23
5.4.190.3070.04019.09
5.4.180.2930.03719.14
5.4.170.3000.03319.30
5.4.160.3230.03319.20
5.4.150.3270.04019.11
5.4.140.4030.04316.50
5.4.130.4170.04016.35
5.4.120.4200.03316.39
5.4.110.3570.02716.56
5.4.100.4230.02716.53
5.4.90.3500.03316.19
5.4.80.4070.03716.53
5.4.70.3670.02716.55
5.4.60.3300.05316.54
5.4.50.3700.03316.43
5.4.40.3200.03716.23
5.4.30.3630.03016.54
5.4.20.3230.03716.53
5.4.10.3200.03716.42
5.4.00.3830.03716.16
5.3.290.3300.03314.58
5.3.280.2470.04014.52
5.3.270.3530.03714.76
5.3.260.3470.03314.77
5.3.250.4330.03714.62
5.3.240.4200.03314.83
5.3.230.4100.03714.57
5.3.220.3670.03314.58
5.3.210.3300.04314.57
5.3.200.3770.03314.64
5.3.190.3630.04014.49
5.3.180.3770.03714.72
5.3.170.4300.03314.68
5.3.160.3700.03314.64
5.3.150.3530.04014.68
5.3.140.3470.04014.46
5.3.130.3330.04014.63
5.3.120.3370.03714.56
5.3.110.3600.04014.47
5.3.100.3470.04313.94
5.3.90.3200.03713.94
5.3.80.3700.03313.93
5.3.70.3430.02714.13
5.3.60.3230.03314.18
5.3.50.3230.03314.17
5.3.40.3170.04013.86
5.3.30.4170.03313.81
5.3.20.4130.03313.59
5.3.10.3500.04013.58
5.3.00.4300.03313.75
5.2.170.3070.03011.22
5.2.160.2970.03011.07
5.2.150.3130.02311.23
5.2.140.3500.03311.06
5.2.130.3530.03311.32
5.2.120.3600.02311.19
5.2.110.3670.02311.18
5.2.100.3370.03011.01
5.2.90.3130.03011.00
5.2.80.3400.02711.02
5.2.70.3400.03011.18
5.2.60.3600.03011.27
5.2.50.3470.02711.02
5.2.40.2530.03011.01
5.2.30.2700.02711.19
5.2.20.2530.03711.04
5.2.10.2330.03010.95
5.2.00.2470.03010.68
5.1.60.2370.0309.92
5.1.50.2170.0309.89
5.1.40.2770.02310.02
5.1.30.2500.02310.45
5.1.20.2300.02710.32
5.1.10.2470.02310.00
5.1.00.2400.02710.15
5.0.50.1200.0208.63
5.0.40.1400.0238.53
5.0.30.1500.0308.13
5.0.20.1700.0208.09
5.0.10.1630.0238.39
5.0.00.1500.0308.05
4.4.90.1830.0137.77
4.4.80.0970.0237.77
4.4.70.1270.0177.77
4.4.60.1530.0137.77
4.4.50.1400.0177.77
4.4.40.1130.0237.77
4.4.30.1570.0137.77
4.4.20.1330.0207.77
4.4.10.1270.0177.77
4.4.00.1370.0237.77
4.3.110.1400.0177.77
4.3.100.1630.0177.77
4.3.90.1430.0137.77
4.3.80.1270.0307.79
4.3.70.1430.0107.79
4.3.60.1400.0177.79
4.3.50.1470.0177.80
4.3.40.1430.0307.80
4.3.30.0800.0177.80
4.3.20.0770.0137.81
4.3.10.0730.0237.81
4.3.00.0770.0177.81

preferences:
54.23 ms | 401 KiB | 5 Q