3v4l.org

run code in 300+ PHP versions simultaneously
<?php function is_palindrome($word) { for ($i = 0, $length = strlen($word); $i < $length \ 2; $i++) { if ($word[$i] !== $word[$length-$i-1]) { return false; } } return true; } echo is_palindrome("ded");

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)
5.4.340.0070.04112.03
5.4.320.0130.05312.52
5.4.310.0100.03912.52
5.4.300.0070.04212.52
5.4.290.0070.04312.52
5.4.280.0060.03612.41
5.4.270.0050.04112.41
5.4.260.0090.04012.41
5.4.250.0050.03912.41
5.4.240.0070.03512.41
5.4.230.0070.03912.40
5.4.220.0080.05012.40
5.4.210.0090.03912.40
5.4.200.0070.03812.40
5.4.190.0070.05612.40
5.4.180.0090.04012.39
5.4.170.0040.04312.41
5.4.160.0120.05012.40
5.4.150.0090.04212.40
5.4.140.0070.04312.09
5.4.130.0080.04412.07
5.4.120.0180.05212.04
5.4.110.0180.06012.03
5.4.100.0080.04212.03
5.4.90.0120.04912.03
5.4.80.0100.06812.03
5.4.70.0140.06012.03
5.4.60.0100.04012.02
5.4.50.0130.05812.03
5.4.40.0070.04312.02
5.4.30.0130.04012.01
5.4.20.0080.04412.00
5.4.10.0100.03112.01
5.4.00.0110.05711.50
5.3.290.0070.04212.80
5.3.280.0050.04112.71
5.3.270.0070.03912.72
5.3.260.0080.03912.72
5.3.250.0090.03712.72
5.3.240.0070.03712.71
5.3.230.0080.03712.71
5.3.220.0040.04212.68
5.3.210.0090.03612.68
5.3.200.0050.03712.68
5.3.190.0040.03912.68
5.3.180.0080.03512.67
5.3.170.0050.04012.67
5.3.160.0070.03812.68
5.3.150.0030.04112.68
5.3.140.0090.04112.66
5.3.130.0110.05112.66
5.3.120.0110.04212.66
5.3.110.0080.07012.66
5.3.100.0110.04612.13
5.3.90.0090.04112.11
5.3.80.0060.04112.09
5.3.70.0070.03812.09
5.3.60.0080.03812.08
5.3.50.0070.03712.02
5.3.40.0040.03812.02
5.3.30.0110.03011.98
5.3.20.0070.03911.76
5.3.10.0070.04011.74
5.3.00.0050.03711.71
5.2.170.0050.0329.21
5.2.160.0090.0319.21
5.2.150.0070.0369.21
5.2.140.0060.0349.21
5.2.130.0030.0309.18
5.2.120.0060.0289.18
5.2.110.0040.0319.18
5.2.100.0060.0309.18
5.2.90.0090.0319.18
5.2.80.0070.0299.17
5.2.70.0050.0339.17
5.2.60.0060.0299.13
5.2.50.0040.0319.09
5.2.40.0070.0279.07
5.2.30.0090.0269.05
5.2.20.0030.0319.05
5.2.10.0080.0258.95
5.2.00.0070.0288.80
5.1.60.0040.0258.08
5.1.50.0040.0288.08
5.1.40.0070.0338.07
5.1.30.0090.0358.43
5.1.20.0050.0308.44
5.1.10.0070.0338.16
5.1.00.0020.0378.16
5.0.50.0060.0266.64
5.0.40.0040.0236.50
5.0.30.0040.0346.31
5.0.20.0040.0206.28
5.0.10.0020.0216.26
5.0.00.0040.0326.25
4.4.90.0050.0174.78
4.4.80.0060.0124.75
4.4.70.0040.0154.75
4.4.60.0030.0164.75
4.4.50.0030.0174.77
4.4.40.0040.0244.71
4.4.30.0040.0164.76
4.4.20.0050.0154.85
4.4.10.0050.0144.84
4.4.00.0030.0254.76
4.3.110.0060.0254.67
4.3.100.0040.0264.67
4.3.90.0020.0164.63
4.3.80.0010.0264.59
4.3.70.0050.0134.63
4.3.60.0020.0184.62
4.3.50.0050.0134.63
4.3.40.0020.0254.54
4.3.30.0020.0173.30
4.3.20.0030.0153.29
4.3.10.0030.0163.25
4.3.00.0130.0236.96

preferences:
145.37 ms | 1398 KiB | 7 Q