3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a= & $_POST; $a=array(); function isRef($var) { $info = getZvalRefCountInfo($var); return (boolean) $info['is_ref']; } function getZvalRefCountInfo($var) { ob_start(); xdebug_debug_zval($var); $info = ob_get_clean(); preg_match('(: \(refcount=(\d+), is_ref=(\d+)\))', $info, $match); return array('refcount' => $match[1], 'is_ref' => $match[2]); } var_dump(isRef($a));

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)
8.3.70.0040.01116.75
8.3.60.0140.00718.41
8.3.50.0130.00821.02
8.3.40.0120.00319.01
8.3.30.0110.00420.34
8.3.20.0040.00421.96
8.3.10.0040.00422.12
8.3.00.0030.00622.39
8.2.180.0100.01016.75
8.2.170.0040.01222.96
8.2.160.0070.00722.25
8.2.150.0000.00824.18
8.2.140.0090.00024.66
8.2.130.0040.00426.16
8.2.120.0080.00020.66
8.2.110.0040.00420.32
8.2.100.0030.01017.84
8.2.90.0000.00819.05
8.2.80.0040.00419.21
8.2.70.0060.00317.50
8.2.60.0030.00617.80
8.2.50.0030.00518.07
8.2.40.0000.00819.95
8.2.30.0030.00619.35
8.2.20.0100.00017.74
8.2.10.0080.00017.89
8.2.00.0000.00717.81
8.1.280.0030.01725.92
8.1.270.0040.00423.99
8.1.260.0070.00026.35
8.1.250.0030.00528.09
8.1.240.0040.00423.73
8.1.230.0040.00824.03
8.1.220.0000.00818.77
8.1.210.0080.00018.95
8.1.200.0060.00317.23
8.1.190.0030.00517.55
8.1.180.0040.00418.10
8.1.170.0040.00418.54
8.1.160.0000.00719.01
8.1.150.0000.00718.58
8.1.140.0040.00417.46
8.1.130.0070.00017.86
8.1.120.0040.00317.47
8.1.110.0000.00717.37
8.1.100.0000.00717.36
8.1.90.0040.00417.39
8.1.80.0040.00417.45
8.1.70.0030.00517.38
8.1.60.0030.00617.63
8.1.50.0070.00017.51
8.1.40.0050.00217.45
8.1.30.0030.00617.63
8.1.20.0030.00517.71
8.1.10.0040.00417.59
8.1.00.0000.00817.60
8.0.300.0040.00419.97
8.0.290.0070.00016.93
8.0.280.0070.00018.42
8.0.270.0040.00417.21
8.0.260.0030.00316.91
8.0.250.0060.00017.13
8.0.240.0030.00817.00
8.0.230.0000.00817.02
8.0.220.0040.00316.86
8.0.210.0040.00416.97
8.0.200.0030.00316.92
8.0.190.0000.00817.06
8.0.180.0040.00417.03
8.0.170.0030.00616.91
8.0.160.0000.00816.84
8.0.150.0040.00416.93
8.0.140.0070.00017.00
8.0.130.0000.00513.41
8.0.120.0000.00716.85
8.0.110.0000.00716.92
8.0.100.0080.00016.88
8.0.90.0070.00016.86
8.0.80.0070.00716.99
8.0.70.0000.00716.78
8.0.60.0040.00416.96
8.0.50.0040.00417.08
8.0.30.0070.01217.23
8.0.20.0110.01217.40
8.0.10.0040.00416.94
8.0.00.0130.00516.68
7.4.330.0000.00515.00
7.4.320.0060.00016.43
7.4.300.0030.00316.50
7.4.290.0070.00016.45
7.4.280.0080.00016.55
7.4.270.0000.00716.55
7.4.260.0040.00313.29
7.4.250.0040.00416.39
7.4.240.0020.00516.63
7.4.230.0070.00016.50
7.4.220.0090.00916.55
7.4.210.0060.00816.58
7.4.200.0070.00016.59
7.4.190.0000.00716.66
7.4.160.0060.01016.50
7.4.150.0130.00317.40
7.4.140.0100.00917.86
7.4.130.0130.00316.63
7.4.120.0160.00116.58
7.4.110.0090.00916.60
7.4.100.0070.01716.55
7.4.90.0100.00716.69
7.4.80.0070.01019.39
7.4.70.0100.00616.50
7.4.60.0060.00916.44
7.4.50.0040.00416.72
7.4.40.0030.00722.77
7.4.30.0180.00616.50
7.4.00.0040.01114.74
7.3.330.0000.00513.39
7.3.320.0050.00013.24
7.3.310.0000.00816.27
7.3.300.0030.00316.36
7.3.290.0080.00616.36
7.3.280.0050.01316.27
7.3.270.0110.00617.40
7.3.260.0070.01016.51
7.3.250.0080.01016.56
7.3.240.0090.00916.32
7.3.230.0060.01816.45
7.3.210.0070.01016.52
7.3.200.0000.01619.39
7.3.190.0130.00716.49
7.3.180.0070.01016.45
7.3.170.0080.00816.32
7.3.160.0130.00616.61
7.3.120.0140.00314.75
7.2.330.0120.00616.39
7.2.320.0060.01216.51
7.2.310.0060.01216.71
7.2.300.0060.00916.45
7.2.290.0040.01216.60
7.2.60.0070.00716.68
7.1.200.0060.00615.81
7.1.70.0000.01116.93
7.1.60.0140.00719.32
7.1.50.0070.01316.46
7.1.00.0000.05322.54
7.0.200.0030.00516.57
7.0.140.0070.06321.96
7.0.60.0030.04719.87
7.0.50.0100.05317.98
7.0.40.0130.03320.04
7.0.30.0330.07320.24
7.0.20.0270.08320.07
7.0.10.0230.07020.07
7.0.00.0000.05020.33
5.6.280.0070.06720.89
5.6.210.0100.07720.50
5.6.200.0000.04318.22
5.6.190.0170.07020.52
5.6.180.0300.07320.58
5.6.170.0230.03720.39
5.6.160.0100.05020.71
5.6.150.0070.04018.18
5.6.140.0100.07718.27
5.6.130.0070.06018.18
5.6.120.0130.08021.02
5.6.110.0070.04020.99
5.6.100.0100.06721.03
5.6.90.0100.07321.11
5.6.80.0170.06720.36
5.5.350.0030.08020.50
5.5.340.0070.08317.95
5.5.330.0100.08020.40
5.5.320.0400.05720.14
5.5.310.0100.04720.29
5.5.300.0070.03317.98
5.5.290.0030.05018.01
5.5.280.0070.08720.88
5.5.270.0030.04020.76
5.5.260.0030.04720.87
5.5.250.0100.07020.79
5.5.240.0130.07720.37
5.4.450.1900.05019.56
5.4.440.0130.04319.59
5.4.430.0970.05719.54
5.4.420.3130.04719.51
5.4.410.2900.04719.36
5.4.400.2970.03719.13
5.4.390.3100.03318.98
5.4.380.3370.04018.94
5.4.370.3500.03719.06
5.4.360.2800.04718.94
5.4.350.2870.03719.12
5.4.340.3030.03318.93
5.4.320.3700.04019.19
5.4.310.3930.05319.10
5.4.300.3500.04019.06
5.4.290.4170.04019.10
5.4.280.3700.04318.94
5.4.270.3500.03719.20
5.4.260.2500.04319.22
5.4.250.0030.05019.20
5.4.240.1900.06019.20
5.4.230.3100.03319.10
5.4.220.3670.04019.18
5.4.210.3070.04019.14
5.4.200.3330.05719.14
5.4.190.3670.03719.20
5.4.180.3300.03719.11
5.4.170.3270.03718.96
5.4.160.0030.06719.20
5.4.150.1000.04319.17
5.4.140.2900.03316.54
5.4.130.3600.03316.39
5.4.120.3830.03716.55
5.4.110.3730.03716.50
5.4.100.4030.03316.27
5.4.90.2930.03716.53
5.4.80.3000.04016.52
5.4.70.1330.03716.61
5.4.60.2070.03316.21
5.4.50.2030.03316.50
5.4.40.2130.03716.52
5.4.30.1670.03716.30
5.4.20.1630.03716.50
5.4.10.1970.03316.50
5.4.00.1870.02715.93
5.3.290.3100.04014.71
5.3.280.3470.04014.62
5.3.270.3170.04014.61
5.3.260.0070.06314.53
5.3.250.3800.04314.63
5.3.240.3800.03714.61
5.3.230.3730.03714.64
5.3.220.3630.03314.58
5.3.210.2400.03714.56
5.3.200.3570.03714.57
5.3.190.1870.03714.57
5.3.180.2330.03314.63
5.3.170.1930.04714.59
5.3.160.2070.03714.58
5.3.150.2930.03014.64
5.3.140.1930.04014.56
5.3.130.2170.04014.54
5.3.120.1230.03714.59
5.3.110.1900.04014.59
5.3.100.2370.03313.93
5.3.90.2270.03013.95
5.3.80.3430.03314.03
5.3.70.4200.04013.99
5.3.60.3030.03013.98
5.3.50.3130.04014.01
5.3.40.4170.04013.98
5.3.30.4000.03314.06
5.3.20.2970.03713.86
5.3.10.3170.03313.56
5.3.00.3030.03713.71
5.2.170.3230.03011.11
5.2.160.2930.02711.12
5.2.150.3130.02711.13
5.2.140.2300.02011.30
5.2.130.2900.03011.16
5.2.120.3270.02311.04
5.2.110.2170.03311.08
5.2.100.3200.02711.17
5.2.90.2900.03311.16
5.2.80.2530.03310.98
5.2.70.2830.03011.16
5.2.60.3000.03011.22
5.2.50.2300.03310.98
5.2.40.2400.03011.05
5.2.30.2300.02311.05
5.2.20.2030.03310.88
5.2.10.2800.02310.87
5.2.00.2170.03010.80
5.1.60.2330.02710.02
5.1.50.2200.0309.91
5.1.40.2170.02310.00
5.1.30.2730.03310.27
5.1.20.2000.02710.32
5.1.10.2370.02310.05
5.1.00.0670.04010.09
5.0.50.0600.0208.62
5.0.40.1600.0278.33
5.0.30.1530.0308.22
5.0.20.1270.0208.30
5.0.10.1230.0238.23
5.0.00.1300.0308.23
4.4.90.1330.0205.83
4.4.80.1200.0205.83
4.4.70.1130.0135.89
4.4.60.0830.0175.89
4.4.50.1430.0175.82
4.4.40.1130.0275.79
4.4.30.1330.0175.82
4.4.20.0870.0235.93
4.4.10.0600.0175.90
4.4.00.1430.0305.89
4.3.110.1330.0205.88
4.3.100.1100.0135.82
4.3.90.1200.0135.71
4.3.80.1100.0235.75
4.3.70.1030.0175.71
4.3.60.1100.0175.81
4.3.50.1130.0205.74
4.3.40.1570.0275.69
4.3.30.0630.0275.13
4.3.20.0630.0205.13
4.3.10.0700.0135.13
4.3.00.0770.0135.13

preferences:
42.62 ms | 401 KiB | 5 Q