3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a' $str += 'b';

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)
5.4.260.0070.04212.36
5.4.250.0080.05012.36
5.4.240.0090.04412.36
5.4.230.0050.04112.36
5.4.220.0060.03712.35
5.4.210.0040.03612.35
5.4.200.0050.03712.36
5.4.190.0060.03612.35
5.4.180.0100.03212.35
5.4.170.0050.03612.36
5.4.160.0070.03312.35
5.4.150.0060.03612.35
5.4.140.0040.03912.04
5.4.130.0060.03612.02
5.4.120.0050.04111.98
5.4.110.0020.03811.98
5.4.100.0060.03411.98
5.4.90.0030.03911.98
5.4.80.0010.04111.98
5.4.70.0030.03711.98
5.4.60.0060.03511.98
5.4.50.0070.03411.98
5.4.40.0090.03211.96
5.4.30.0050.03611.96
5.4.20.0030.03811.96
5.4.10.0030.03611.96
5.4.00.0020.03911.45
5.3.280.0050.03912.71
5.3.270.0050.03912.72
5.3.260.0050.03912.72
5.3.250.0040.03712.71
5.3.240.0050.03712.71
5.3.230.0070.03612.71
5.3.220.0040.03812.68
5.3.210.0030.04012.68
5.3.200.0060.03512.68
5.3.190.0030.03912.68
5.3.180.0050.03612.67
5.3.170.0060.03412.67
5.3.160.0040.03712.67
5.3.150.0050.03712.68
5.3.140.0030.04012.66
5.3.130.0040.03912.66
5.3.120.0040.03912.66
5.3.110.0050.03912.66
5.3.100.0030.03812.12
5.3.90.0060.03612.08
5.3.80.0060.03512.08
5.3.70.0040.03712.08
5.3.60.0040.03712.06
5.3.50.0050.03512.00
5.3.40.0020.03912.00
5.3.30.0060.03311.94
5.3.20.0050.03511.70
5.3.10.0040.03711.65
5.3.00.0030.03811.64
5.2.170.0070.0279.14
5.2.160.0030.0309.14
5.2.150.0020.0329.14
5.2.140.0040.0319.14
5.2.130.0060.0279.10
5.2.120.0050.0279.10
5.2.110.0040.0309.11
5.2.100.0030.0309.10
5.2.90.0060.0319.10
5.2.80.0040.0309.09
5.2.70.0030.0319.09
5.2.60.0050.0299.05
5.2.50.0040.0309.02
5.2.40.0040.0288.99
5.2.30.0040.0298.96
5.2.20.0040.0298.96
5.2.10.0040.0308.88
5.2.00.0030.0298.74
5.1.60.0050.0228.03
5.1.50.0030.0248.03
5.1.40.0050.0238.01
5.1.30.0020.0278.36
5.1.20.0050.0318.38
5.1.10.0060.0238.11
5.1.00.0040.0258.11
5.0.50.0030.0216.58
5.0.40.0020.0206.44
5.0.30.0030.0316.26
5.0.20.0040.0186.23
5.0.10.0030.0206.21
5.0.00.0020.0326.20
4.4.90.0030.0154.78
4.4.80.0040.0144.76
4.4.70.0020.0164.75
4.4.60.0030.0154.76
4.4.50.0030.0144.77
4.4.40.0030.0254.71
4.4.30.0030.0154.76
4.4.20.0030.0164.84
4.4.10.0030.0204.85
4.4.00.0030.0244.76
4.3.110.0020.0154.67
4.3.100.0030.0154.66
4.3.90.0060.0134.64
4.3.80.0040.0224.59
4.3.70.0020.0144.63
4.3.60.0020.0154.63
4.3.50.0020.0164.63
4.3.40.0040.0224.53
4.3.30.0020.0163.27
4.3.20.0010.0173.25
4.3.10.0030.0153.21
4.3.00.0030.0275.80

preferences:
142.89 ms | 1394 KiB | 7 Q