3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "0 "; $a = (++$a) + ($a++); print $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)
5.4.310.0060.03812.46
5.4.300.0060.03612.46
5.4.290.0070.03612.46
5.4.280.0050.03612.36
5.4.270.0060.03612.36
5.4.260.0070.03712.36
5.4.250.0070.04012.36
5.4.240.0090.03412.36
5.4.230.0050.03912.35
5.4.220.0080.03912.35
5.4.210.0050.03512.35
5.4.200.0080.03612.35
5.4.190.0040.03812.35
5.4.180.0080.03412.35
5.4.170.0070.03512.36
5.4.160.0090.03212.36
5.4.150.0070.03412.35
5.4.140.0060.03712.04
5.4.130.0050.03612.02
5.4.120.0090.03111.98
5.4.110.0060.03511.98
5.4.100.0060.03511.98
5.4.90.0050.03711.98
5.4.80.0090.03311.98
5.4.70.0060.03511.97
5.4.60.0040.03611.98
5.4.50.0060.03911.98
5.4.40.0060.03411.96
5.4.30.0070.03611.96
5.4.20.0060.03511.96
5.4.10.0060.03611.96
5.4.00.0050.03711.45
5.3.280.0090.03512.71
5.3.270.0070.03712.73
5.3.260.0070.03812.72
5.3.250.0050.03912.72
5.3.240.0050.03912.72
5.3.230.0040.03912.71
5.3.220.0070.03612.68
5.3.210.0070.03812.68
5.3.200.0050.03812.68
5.3.190.0080.03612.68
5.3.180.0070.03612.68
5.3.170.0070.03612.67
5.3.160.0050.03712.68
5.3.150.0060.03712.67
5.3.140.0100.03612.66
5.3.130.0120.03212.65
5.3.120.0110.03412.66
5.3.110.0020.04212.66
5.3.100.0080.04012.12
5.3.90.0080.03712.08
5.3.80.0080.03712.07
5.3.70.0030.03912.07
5.3.60.0050.03712.07
5.3.50.0070.03512.00
5.3.40.0040.03812.00
5.3.30.0100.03511.95
5.3.20.0060.03811.73
5.3.10.0050.04011.69
5.3.00.0080.03311.69
5.2.170.0060.0289.18
5.2.160.0050.0299.18
5.2.150.0050.0299.18
5.2.140.0060.0299.18
5.2.130.0070.0259.14
5.2.120.0030.0369.14
5.2.110.0040.0299.14
5.2.100.0040.0319.14
5.2.90.0060.0369.14
5.2.80.0040.0309.14
5.2.70.0050.0299.14
5.2.60.0060.0289.09
5.2.50.0030.0359.06
5.2.40.0040.0339.04
5.2.30.0030.0359.01
5.2.20.0030.0319.00
5.2.10.0060.0258.93
5.2.00.0070.0268.78
5.1.60.0040.0288.07
5.1.50.0050.0308.07
5.1.40.0050.0288.05
5.1.30.0120.0238.40
5.1.20.0050.0308.42
5.1.10.0080.0258.15
5.1.00.0080.0238.15
5.0.50.0030.0246.62
5.0.40.0050.0236.48
5.0.30.0060.0316.29
5.0.20.0040.0246.27
5.0.10.0070.0196.24
5.0.00.0030.0366.23
4.4.90.0030.0184.78
4.4.80.0040.0174.75
4.4.70.0060.0154.76
4.4.60.0030.0174.76
4.4.50.0040.0204.77
4.4.40.0030.0244.71
4.4.30.0030.0164.76
4.4.20.0020.0164.84
4.4.10.0040.0214.85
4.4.00.0010.0264.76
4.3.110.0010.0184.67
4.3.100.0030.0174.66
4.3.90.0000.0204.63
4.3.80.0030.0344.59
4.3.70.0050.0124.63
4.3.60.0040.0174.63
4.3.50.0040.0144.63
4.3.40.0060.0334.53
4.3.30.0030.0153.28
4.3.20.0060.0153.26
4.3.10.0030.0203.21
4.3.00.0000.01315.90

preferences:
140.41 ms | 1394 KiB | 7 Q