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 - 1); } 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)
8.3.40.0150.00018.82
8.3.30.0080.00619.08
8.3.20.0070.00720.22
8.3.10.0060.00321.70
8.3.00.0040.00422.46
8.2.170.0060.01022.96
8.2.160.0070.01019.26
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0100.00326.16
8.2.120.0170.00319.48
8.2.110.0030.00622.25
8.2.100.0110.00417.78
8.2.90.0080.00019.17
8.2.80.0050.00317.97
8.2.70.0040.00417.63
8.2.60.0080.00018.05
8.2.50.0030.00618.07
8.2.40.0050.00220.07
8.2.30.0000.00718.22
8.2.20.0060.00317.78
8.2.10.0040.00417.73
8.2.00.0050.00317.73
8.1.270.0080.00022.19
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0000.00923.84
8.1.230.0080.00319.08
8.1.220.0050.00317.76
8.1.210.0050.00318.77
8.1.200.0060.00317.23
8.1.190.0060.00317.66
8.1.180.0030.00518.69
8.1.170.0060.00618.48
8.1.160.0040.00422.09
8.1.150.0050.00218.50
8.1.140.0000.00817.48
8.1.130.0000.00817.84
8.1.120.0000.00717.36
8.1.110.0070.00017.37
8.1.100.0000.00717.50
8.1.90.0040.00417.33
8.1.80.0000.00717.47
8.1.70.0000.00717.35
8.1.60.0030.00617.54
8.1.50.0000.00917.52
8.1.40.0050.00317.50
8.1.30.0050.00317.66
8.1.20.0090.00017.69
8.1.10.0030.00517.52
8.1.00.0060.00317.29
8.0.300.0040.00418.77
8.0.290.0000.00717.18
8.0.280.0030.00318.43
8.0.270.0050.00317.30
8.0.260.0030.00316.86
8.0.250.0000.00716.92
8.0.240.0080.00017.00
8.0.230.0030.00317.04
8.0.220.0070.00016.97
8.0.210.0030.00316.95
8.0.200.0000.00716.98
8.0.190.0060.00316.98
8.0.180.0040.00416.96
8.0.170.0070.00016.79
8.0.160.0040.00417.04
8.0.150.0000.00716.95
8.0.140.0000.00716.80
8.0.130.0030.00313.43
8.0.120.0050.00316.98
8.0.110.0000.00716.79
8.0.100.0040.00417.01
8.0.90.0040.00417.02
8.0.80.0070.01016.92
8.0.70.0000.00716.84
8.0.60.0040.00416.85
8.0.50.0040.00416.93
8.0.30.0130.00516.92
8.0.20.0160.01117.40
8.0.10.0000.00716.94
8.0.00.0110.00716.87
7.4.330.0000.00515.00
7.4.320.0030.00316.60
7.4.300.0030.00316.50
7.4.290.0000.00816.58
7.4.280.0050.00216.54
7.4.270.0030.00316.60
7.4.260.0000.00716.58
7.4.250.0070.00016.35
7.4.240.0030.00416.49
7.4.230.0030.00316.57
7.4.220.0120.00616.66
7.4.210.0070.00816.53
7.4.200.0000.00816.35
7.4.190.0070.00016.39
7.4.160.0060.01016.48
7.4.150.0100.00717.40
7.4.140.0140.00617.86
7.4.130.0030.01416.41
7.4.120.0090.01516.52
7.4.110.0060.01216.55
7.4.100.0060.01216.57
7.4.90.0090.00916.58
7.4.80.0000.01719.39
7.4.70.0150.00416.27
7.4.60.0060.01016.49
7.4.50.0050.00316.42
7.4.40.0030.01322.77
7.4.30.0000.01616.51
7.4.00.0030.01014.88
7.3.330.0050.00013.29
7.3.320.0000.00513.27
7.3.310.0000.00816.32
7.3.300.0030.00316.38
7.3.290.0100.00316.31
7.3.280.0070.01116.27
7.3.270.0100.00717.40
7.3.260.0140.00416.56
7.3.250.0130.00816.37
7.3.240.0100.00716.59
7.3.230.0070.01016.39
7.3.210.0070.01116.29
7.3.200.0120.00819.39
7.3.190.0100.00716.59
7.3.180.0080.00916.59
7.3.170.0110.01116.48
7.3.160.0000.01616.55
7.3.120.0030.00815.07
7.2.330.0070.01116.74
7.2.320.0070.01216.79
7.2.310.0120.00916.82
7.2.300.0000.01716.63
7.2.290.0130.00916.79
7.2.00.0040.00819.38
7.1.100.0000.01618.21
7.1.70.0030.00317.07
7.1.60.0150.00919.82
7.1.50.0090.01516.93
7.1.00.0070.07322.37
7.0.200.0120.00016.90
7.0.140.0000.07321.92
7.0.60.0030.05719.91
7.0.50.0070.05017.87
7.0.40.0000.05020.39
7.0.30.0300.07720.25
7.0.20.0330.07720.33
7.0.10.0400.07020.12
7.0.00.0100.09020.16
5.6.210.0170.06720.67
5.6.200.0100.05718.15
5.6.190.0170.07720.63
5.6.180.3530.04020.64
5.6.170.0370.08020.50
5.6.160.0130.07320.47
5.6.150.0100.07318.14
5.6.140.0100.07318.11
5.6.130.0100.08018.24
5.6.120.0070.08321.05
5.6.110.0000.04320.99
5.6.100.0030.04021.13
5.6.90.0070.07721.02
5.6.80.0170.07320.38
5.6.70.3770.04320.28
5.5.350.0170.04020.39
5.5.340.0030.07717.99
5.5.330.0070.07020.19
5.5.320.0170.04720.34
5.5.310.0230.07720.31
5.5.300.0070.07318.00
5.5.290.0000.09017.97
5.5.280.0100.05020.73
5.5.270.0070.04020.88
5.5.260.0170.05020.77
5.5.250.0070.07720.70
5.5.240.0100.07720.36
5.4.450.0400.05019.61
5.4.440.0700.06019.53
5.4.430.0730.06019.30
5.4.420.0370.05019.53
5.4.410.0600.05319.48
5.4.400.0400.05718.54
5.4.390.0400.05318.63
5.4.380.0130.06718.80
5.4.370.0070.06018.78
5.4.360.0300.03718.59
5.4.350.0200.05318.83
5.4.340.0130.05318.77
5.4.320.0080.03812.50
5.4.310.0110.03712.50
5.4.300.0030.03912.51
5.4.290.0060.03912.50
5.4.280.0020.03912.39
5.4.270.0060.03612.40
5.4.260.0070.05319.02
5.4.250.0130.04718.91
5.4.240.0070.05319.02
5.4.230.0030.06718.95
5.4.220.0130.07318.80
5.4.210.0000.05718.66
5.4.200.0170.06319.10
5.4.190.0200.04018.95
5.4.180.0100.07018.97
5.4.170.0170.04718.80
5.4.160.0100.07718.95
5.4.150.0170.04718.79
5.4.140.0070.05016.43
5.4.130.0130.05716.38
5.4.120.0030.05316.35
5.4.110.0070.05016.56
5.4.100.0100.04716.50
5.4.90.0130.04016.56
5.4.80.0200.03716.40
5.4.70.0070.04716.32
5.4.60.0000.06016.34
5.4.50.0130.05016.46
5.4.40.0130.05016.52
5.4.30.0000.06016.54
5.4.20.0030.05016.50
5.4.10.0030.05316.52
5.4.00.0070.05015.80
5.3.290.0060.03812.80
5.3.280.0030.05314.67
5.3.270.0070.06314.63
5.3.260.0100.06714.62
5.3.250.0170.05714.43
5.3.240.0070.05014.68
5.3.230.0100.05014.68
5.3.220.0030.05714.54
5.3.210.0130.04714.63
5.3.200.0070.06014.64
5.3.190.0000.06314.72
5.3.180.0100.06714.73
5.3.170.0030.05314.64
5.3.160.0200.04014.69
5.3.150.0100.04714.63
5.3.140.0070.06314.57
5.3.130.0100.05014.62
5.3.120.0070.05314.37
5.3.110.0070.05314.64
5.3.100.0100.06714.02
5.3.90.0100.05014.20
5.3.80.0070.05013.85
5.3.70.0130.04314.00
5.3.60.0130.04714.00
5.3.50.0030.05314.03
5.3.40.0070.06013.96
5.3.30.0100.04713.88
5.3.20.0000.05713.71
5.3.10.0100.04713.55
5.3.00.0030.05013.80
5.2.170.0000.04311.15
5.2.160.0100.04711.16
5.2.150.0070.04310.97
5.2.140.0070.04011.15
5.2.130.0070.03711.11
5.2.120.0100.03710.93
5.2.110.0000.04311.09
5.2.100.0000.04711.19
5.2.90.0030.04311.11
5.2.80.0070.04711.10
5.2.70.0100.04011.20
5.2.60.0100.04310.95
5.2.50.0070.04311.12
5.2.40.0030.04010.91
5.2.30.0030.04011.12
5.2.20.0000.04710.97
5.2.10.0030.04010.77
5.2.00.0030.04010.88
5.1.60.0030.03710.05
5.1.50.0200.03310.02
5.1.40.0000.03710.03
5.1.30.0070.03310.40
5.1.20.0000.04010.24
5.1.10.0070.0339.91
5.1.00.0030.03710.15
5.0.50.0030.0308.51
5.0.40.0030.0278.50
5.0.30.0000.0438.28
5.0.20.0000.0308.34
5.0.10.0070.0238.11
5.0.00.0070.0378.19
4.4.90.0030.0207.36
4.4.80.0000.0237.36
4.4.70.0030.0207.36
4.4.60.0030.0207.36
4.4.50.0000.0237.36
4.4.40.0070.0277.36
4.4.30.0000.0277.36
4.4.20.0070.0177.36
4.4.10.0100.0207.36
4.4.00.0100.0407.36
4.3.110.0030.0207.36
4.3.100.0070.0177.36
4.3.90.0000.0207.36
4.3.80.0000.0377.36
4.3.70.0030.0207.36
4.3.60.0000.0207.36
4.3.50.0070.0177.36
4.3.40.0000.0337.36
4.3.30.0000.0237.36
4.3.20.0000.0237.36
4.3.10.0000.0237.36
4.3.00.0030.0307.14

preferences:
40.88 ms | 400 KiB | 5 Q