3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f(n) { if (n > 1) { return f(n-1) + f(n-2); } return n; } f(20);

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)
5.4.350.0070.03712.02
5.4.340.0060.03612.03
5.4.320.0060.04712.52
5.4.310.0080.03712.51
5.4.300.0040.03812.52
5.4.290.0080.03612.51
5.4.280.0030.03712.41
5.4.270.0050.04112.40
5.4.260.0070.03812.40
5.4.250.0050.03712.41
5.4.240.0050.03712.41
5.4.230.0050.03912.40
5.4.220.0030.04012.40
5.4.210.0060.03512.39
5.4.200.0040.04112.40
5.4.190.0040.03812.39
5.4.180.0060.03712.39
5.4.170.0060.04012.40
5.4.160.0070.03712.39
5.4.150.0080.03712.39
5.4.140.0100.03612.09
5.4.130.0050.03612.07
5.4.120.0030.03712.03
5.4.110.0060.04012.03
5.4.100.0080.03512.03
5.4.90.0050.04112.03
5.4.80.0060.04212.02
5.4.70.0050.04012.02
5.4.60.0060.03512.02
5.4.50.0070.03312.02
5.4.40.0030.03612.01
5.4.30.0090.03712.01
5.4.20.0050.04012.00
5.4.10.0050.03712.00
5.4.00.0060.03611.50
5.3.290.0090.03712.80
5.3.280.0040.04212.70
5.3.270.0060.04312.72
5.3.260.0060.03912.71
5.3.250.0060.04312.72
5.3.240.0070.05012.72
5.3.230.0060.04412.71
5.3.220.0050.04012.68
5.3.210.0060.04112.68
5.3.200.0020.04212.68
5.3.190.0040.03912.68
5.3.180.0060.04312.68
5.3.170.0080.03812.66
5.3.160.0050.03712.68
5.3.150.0060.03712.68
5.3.140.0070.03612.66
5.3.130.0060.04712.65
5.3.120.0090.03612.66
5.3.110.0060.04112.66
5.3.100.0090.03612.13
5.3.90.0100.03612.11
5.3.80.0080.04512.09
5.3.70.0060.04012.09
5.3.60.0070.03812.08
5.3.50.0080.03912.02
5.3.40.0070.04212.02
5.3.30.0090.03611.98
5.3.20.0080.03811.77
5.3.10.0130.04311.73
5.3.00.0070.03911.71
5.2.170.0030.0359.21
5.2.160.0080.0279.21
5.2.150.0090.0339.22
5.2.140.0100.0309.21
5.2.130.0030.0329.18
5.2.120.0070.0319.18
5.2.110.0140.0399.18
5.2.100.0110.0369.18
5.2.90.0080.0379.18
5.2.80.0070.0329.17
5.2.70.0060.0329.17
5.2.60.0060.0349.12
5.2.50.0090.0369.09
5.2.40.0100.0339.07
5.2.30.0070.0329.05
5.2.20.0070.0319.04
5.2.10.0070.0288.95
5.2.00.0070.0298.80
5.1.60.0070.0248.09
5.1.50.0080.0258.08
5.1.40.0060.0278.07
5.1.30.0080.0338.42
5.1.20.0070.0338.44
5.1.10.0060.0368.16
5.1.00.0110.0338.16
5.0.50.0070.0206.64
5.0.40.0040.0246.50
5.0.30.0060.0316.31
5.0.20.0050.0286.29
5.0.10.0070.0216.25
5.0.00.0060.0326.25
4.4.90.0050.0174.77
4.4.80.0060.0154.76
4.4.70.0010.0224.76
4.4.60.0070.0224.76
4.4.50.0060.0164.77
4.4.40.0270.0414.71
4.4.30.0150.0164.76
4.4.20.0070.0184.85
4.4.10.0080.0174.85
4.4.00.0070.0414.76
4.3.110.0050.0174.67
4.3.100.0020.0184.66
4.3.90.0030.0144.63
4.3.80.0050.0254.59
4.3.70.0040.0204.63
4.3.60.0030.0214.63
4.3.50.0040.0214.62
4.3.40.0060.0284.53
4.3.30.0040.0193.30
4.3.20.0050.0173.29
4.3.10.0030.0183.23
4.3.00.0100.0236.65

preferences:
141.13 ms | 1386 KiB | 7 Q