3v4l.org

run code in 300+ PHP versions simultaneously
<?php const BACK_OFF_SCALE_FACTOR = 1; function get_back_off_sleep_time(&$int_back_off_multiplier) { if ($int_back_off_multiplier++) { return BACK_OFF_SCALE_FACTOR * pow(2, $int_back_off_multiplier - 2); } return 0; } $foo = 0; for ($i = 0; $i < 10; $i++) { echo get_back_off_sleep_time($foo), "\n"; }

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)
8.3.60.0130.00318.07
8.3.50.0040.01221.14
8.3.40.0120.00318.70
8.3.30.0100.01018.85
8.3.20.0080.00018.72
8.3.10.0080.00020.62
8.3.00.0000.01019.51
8.2.180.0060.01516.38
8.2.170.0100.00722.96
8.2.160.0070.00722.26
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00419.83
8.2.110.0060.00321.00
8.2.100.0110.00017.72
8.2.90.0040.00419.09
8.2.80.0000.00818.16
8.2.70.0030.00717.63
8.2.60.0000.00818.05
8.2.50.0040.00418.07
8.2.40.0040.00418.22
8.2.30.0000.00719.78
8.2.20.0060.00317.71
8.2.10.0050.00317.80
8.2.00.0000.00817.71
8.1.270.0000.00723.99
8.1.260.0080.00026.35
8.1.250.0070.00028.09
8.1.240.0030.00622.60
8.1.230.0110.00020.96
8.1.220.0060.00318.77
8.1.210.0000.00818.97
8.1.200.0030.00617.35
8.1.190.0030.00617.53
8.1.180.0030.00518.10
8.1.170.0080.00018.87
8.1.160.0050.00218.88
8.1.150.0020.00518.61
8.1.140.0040.00417.44
8.1.130.0030.00517.80
8.1.120.0030.00317.52
8.1.110.0070.00017.47
8.1.100.0070.00017.35
8.1.90.0050.00317.47
8.1.80.0000.00717.42
8.1.70.0040.00417.38
8.1.60.0080.00017.54
8.1.50.0000.00817.36
8.1.40.0040.00417.50
8.1.30.0020.00517.59
8.1.20.0000.00917.63
8.1.10.0050.00217.50
8.1.00.0040.00417.30
8.0.300.0040.00419.98
8.0.290.0070.00016.75
8.0.280.0040.00418.46
8.0.270.0030.00317.17
8.0.260.0030.00318.72
8.0.250.0000.00717.01
8.0.240.0060.00316.89
8.0.230.0000.00716.95
8.0.220.0050.00516.96
8.0.210.0000.00716.95
8.0.200.0000.00716.89
8.0.190.0040.00416.99
8.0.180.0040.00416.93
8.0.170.0060.00316.97
8.0.160.0000.00716.98
8.0.150.0030.00616.91
8.0.140.0000.00716.96
8.0.130.0000.00613.34
8.0.120.0040.00416.93
8.0.110.0080.00016.89
8.0.100.0040.00417.05
8.0.90.0000.00717.01
8.0.80.0080.00716.90
8.0.70.0000.00716.97
8.0.60.0000.00716.82
8.0.50.0030.00616.87
8.0.30.0120.00717.10
8.0.20.0080.01017.40
8.0.10.0000.00716.95
8.0.00.0110.01016.82
7.4.330.0050.00013.43
7.4.320.0000.00616.35
7.4.300.0000.00616.48
7.4.290.0030.00316.51
7.4.280.0040.00416.45
7.4.270.0000.00716.48
7.4.260.0030.00313.25
7.4.250.0030.00516.58
7.4.240.0070.00016.57
7.4.230.0020.00516.56
7.4.220.0170.00316.66
7.4.210.0080.00816.53
7.4.200.0000.00716.59
7.4.190.0070.00016.57
7.4.160.0120.00916.59
7.4.150.0120.00617.40
7.4.140.0160.00217.08
7.4.130.0110.01016.44
7.4.120.0090.00716.50
7.4.110.0100.01616.30
7.4.100.0080.01116.48
7.4.90.0120.00616.39
7.4.80.0120.00619.03
7.4.70.0110.01116.64
7.4.60.0080.00816.42
7.4.50.0090.00016.48
7.4.40.0070.00422.27
7.4.30.0060.00916.55
7.4.00.0000.01714.73
7.3.330.0030.00313.13
7.3.320.0000.00713.21
7.3.310.0040.00416.41
7.3.300.0030.00316.26
7.3.290.0100.00316.30
7.3.280.0100.00516.31
7.3.270.0130.00917.40
7.3.260.0090.00918.24
7.3.250.0130.00816.51
7.3.240.0140.01016.41
7.3.230.0050.01116.64
7.3.210.0100.00716.28
7.3.200.0080.00919.39
7.3.190.0110.00816.21
7.3.180.0090.00616.52
7.3.170.0110.00616.54
7.3.160.0060.01216.30
7.3.120.0030.01314.69
7.2.330.0090.01216.61
7.2.320.0090.01516.85
7.2.310.0100.00716.54
7.2.300.0120.00816.63
7.2.290.0090.01316.45
7.2.00.0000.01519.27
7.1.100.0000.01117.95
7.1.70.0030.00617.36
7.1.60.0130.01019.40
7.1.50.0000.01216.98
7.1.00.0070.05022.33
7.0.200.0440.00314.54
7.0.140.0030.07321.91
7.0.60.0130.05319.95
7.0.50.0070.08017.89
7.0.40.0070.08320.40
7.0.30.0270.07020.07
7.0.20.0230.05720.32
7.0.10.0000.09020.17
7.0.00.0100.05020.30
5.6.280.0000.07721.04
5.6.210.0130.04320.65
5.6.200.0100.05318.18
5.6.190.0100.06720.50
5.6.180.0230.08320.61
5.6.170.0130.04320.48
5.6.160.0200.07020.50
5.6.150.0100.08318.25
5.6.140.0100.07318.16
5.6.130.0030.06318.19
5.6.120.0130.08021.00
5.6.110.0130.07321.03
5.6.100.0200.06720.96
5.6.90.0170.06721.01
5.6.80.0100.06720.41
5.5.350.0270.07720.47
5.5.340.0030.08718.01
5.5.330.0030.05020.32
5.5.320.0570.06320.35
5.5.310.0130.04320.34
5.5.300.0030.06717.99
5.5.290.0030.08718.08
5.5.280.0070.08720.75
5.5.270.0170.07720.76
5.5.260.0200.07020.88
5.5.250.0030.04020.68
5.5.240.0300.07720.15
5.4.450.3430.03719.57
5.4.440.0130.06319.43
5.4.430.3270.04019.59
5.4.420.3000.03319.63
5.4.410.3500.04019.36
5.4.400.3330.03319.16
5.4.390.3270.03019.00
5.4.380.3200.03319.09
5.4.370.3370.04019.15
5.4.360.3270.04319.20
5.4.350.3200.03718.95
5.4.340.3800.05319.18
5.4.320.3230.04018.98
5.4.310.3170.03318.87
5.4.300.2170.03019.09
5.4.290.2630.03719.16
5.4.280.2530.04019.13
5.4.270.3270.04019.16
5.4.260.2770.04019.09
5.4.250.2130.03318.94
5.4.240.2930.03719.22
5.4.230.3070.03019.13
5.4.220.3630.04719.08
5.4.210.3370.04018.93
5.4.200.3530.04019.30
5.4.190.3400.03319.18
5.4.180.3600.04019.08
5.4.170.3470.03019.00
5.4.160.4000.03718.93
5.4.150.3400.03319.06
5.4.140.3370.03016.52
5.4.130.3130.02316.39
5.4.120.3230.04016.37
5.4.110.3100.03716.31
5.4.100.2900.03716.46
5.4.90.3670.03716.30
5.4.80.3330.03316.40
5.4.70.3430.03316.49
5.4.60.3200.03316.45
5.4.50.3700.03316.16
5.4.40.3270.03716.53
5.4.30.3700.03716.52
5.4.20.3430.03016.53
5.4.10.3400.03316.43
5.4.00.3570.04015.91
5.3.290.2870.03014.79
5.3.280.2770.03314.56
5.3.270.3430.03714.57
5.3.260.3430.03314.82
5.3.250.3400.03714.58
5.3.240.3200.04014.50
5.3.230.3430.03014.75
5.3.220.3330.04714.46
5.3.210.3400.04714.68
5.3.200.3470.03714.46
5.3.190.3330.04014.47
5.3.180.3430.04014.48
5.3.170.3270.04014.55
5.3.160.3570.04014.63
5.3.150.3370.03714.56
5.3.140.3300.04314.46
5.3.130.3330.03314.77
5.3.120.2730.05014.52
5.3.110.3570.03714.55
5.3.100.2670.03313.94
5.3.90.3300.03313.99
5.3.80.3300.03714.02
5.3.70.3400.03313.93
5.3.60.3330.03313.90
5.3.50.3270.04014.11
5.3.40.3830.03714.07
5.3.30.3770.03713.91
5.3.20.3370.03713.72
5.3.10.2970.03013.63
5.3.00.3330.03313.55
5.2.170.3170.03311.08
5.2.160.2800.03011.05
5.2.150.3170.03011.00
5.2.140.2830.03311.00
5.2.130.3000.03010.95
5.2.120.2800.03011.17
5.2.110.2770.03011.14
5.2.100.3170.03711.20
5.2.90.3300.02310.95
5.2.80.2770.03011.11
5.2.70.2970.02311.11
5.2.60.2730.03011.13
5.2.50.2630.03010.95
5.2.40.2300.02011.09
5.2.30.2500.03710.88
5.2.20.2400.02710.82
5.2.10.2500.03310.95
5.2.00.2370.02710.65
5.1.60.2300.02710.11
5.1.50.2370.02310.11
5.1.40.2230.0239.98
5.1.30.2270.02310.48
5.1.20.2370.03010.21
5.1.10.2300.0309.99
5.1.00.1730.02710.14
5.0.50.1100.0208.53
5.0.40.1100.0208.27
5.0.30.1130.0278.11
5.0.20.1170.0138.18
5.0.10.1030.0238.33
5.0.00.1330.0338.03
4.4.90.1130.0106.87
4.4.80.1330.0206.87
4.4.70.1230.0176.87
4.4.60.1100.0136.87
4.4.50.1170.0136.87
4.4.40.1130.0206.87
4.4.30.1100.0176.87
4.4.20.1070.0236.87
4.4.10.1130.0136.87
4.4.00.1330.0376.87
4.3.110.1330.0136.87
4.3.100.1100.0176.87
4.3.90.1070.0176.87
4.3.80.1130.0306.87
4.3.70.1130.0106.87
4.3.60.1100.0136.87
4.3.50.1270.0176.87
4.3.40.1230.0236.87
4.3.30.0630.0176.87
4.3.20.0570.0136.87
4.3.10.0600.0176.87
4.3.00.0570.0136.87

preferences:
51.91 ms | 400 KiB | 5 Q