3v4l.org

run code in 300+ PHP versions simultaneously
<?php function levenshteinDistance($a, $b) { echo("a = ".$a.",b = ".$b); $matrix = array(count($a) + 1); echo("matrix=".$matrix); for ($i=0; $i<count($a)+1; $i++) { $matrix[$i] = array(count($b) + 1); echo("matrix[".$i."]=".$matrix[$i]); } for ($i=0; $i<count($a)+1; $i++) { $matrix[$i][0] = $i; } for ($j=0; $j<count($b)+1; $j++) { $matrix[0][$j] = $j; } for ($i=1; $i<count($a)+1; $i++) { for ($j=1; $j<count($b)+1; $j++) { //$x = $a[$i - 1] == $b[$j -1] ? 0 : 1; if($a[$i-1] == $b[$j-1]){ $x = 0; } else{ $x = 1; } $matrix[$i][$j] = min( $matrix[$i - 1][$j] + 1, $matrix[$i][$j - 1] + 1, $matrix[$i - 1][$j- 1] + $x ); } } return $matrix[count($a)][count($b)]; } echo levenshteinDistance("aaa","bbb"); ?>

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)
8.3.60.0140.00316.88
8.3.50.0110.00621.89
8.3.40.0110.00718.79
8.3.30.0110.00419.04
8.3.20.0040.00420.34
8.3.10.0050.00323.52
8.3.00.0040.00420.84
8.2.180.0090.00616.75
8.2.170.0180.00322.96
8.2.160.0140.00420.52
8.2.150.0080.00024.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0080.00020.85
8.2.110.0060.00322.16
8.2.100.0090.00317.57
8.2.90.0050.00319.27
8.2.80.0030.00617.97
8.2.70.0080.00017.50
8.2.60.0070.00417.93
8.2.50.0000.00918.07
8.2.40.0030.00621.01
8.2.30.0040.00418.15
8.2.20.0040.00417.86
8.2.10.0040.00418.09
8.2.00.0080.00017.63
8.1.280.0150.00025.92
8.1.270.0080.00023.71
8.1.260.0060.00326.35
8.1.250.0080.00028.09
8.1.240.0060.00323.86
8.1.230.0070.00419.15
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0000.01117.36
8.1.190.0050.00317.22
8.1.180.0030.00618.10
8.1.170.0000.00818.64
8.1.160.0040.00421.96
8.1.150.0040.00418.54
8.1.140.0040.00417.32
8.1.130.0000.00717.69
8.1.120.0050.00217.45
8.1.110.0040.00417.29
8.1.100.0040.00417.29
8.1.90.0000.00717.41
8.1.80.0040.00417.36
8.1.70.0000.00717.35
8.1.60.0040.00417.42
8.1.50.0030.00617.50
8.1.40.0000.00817.37
8.1.30.0050.00317.49
8.1.20.0040.00417.54
8.1.10.0080.00017.51
8.1.00.0000.00717.50
8.0.300.0040.00418.77
8.0.290.0040.00416.63
8.0.280.0050.00218.45
8.0.270.0030.00317.28
8.0.260.0040.00417.30
8.0.250.0070.00017.04
8.0.240.0000.00816.98
8.0.230.0000.00817.02
8.0.220.0000.00816.94
8.0.210.0000.00816.93
8.0.200.0000.00717.02
8.0.190.0040.00417.02
8.0.180.0040.00417.04
8.0.170.0040.00416.95
8.0.160.0000.00717.10
8.0.150.0000.00716.84
8.0.140.0000.00916.94
8.0.130.0000.00513.36
8.0.120.0060.00316.85
8.0.110.0040.00416.99
8.0.100.0030.00616.95
8.0.90.0000.00716.82
8.0.80.0100.01017.06
8.0.70.0070.00316.93
8.0.60.0000.00717.08
8.0.50.0020.00516.81
8.0.30.0070.01217.12
8.0.20.0160.00617.40
8.0.10.0050.00316.81
8.0.00.0130.00616.83
7.4.330.0000.00515.09
7.4.320.0000.00616.52
7.4.300.0030.00316.56
7.4.290.0030.00316.54
7.4.280.0000.00716.55
7.4.270.0040.00316.62
7.4.260.0000.00716.64
7.4.250.0080.00016.63
7.4.240.0040.00316.62
7.4.230.0040.00416.62
7.4.220.0030.01516.42
7.4.210.0030.01216.59
7.4.200.0040.00416.64
7.4.190.0000.00716.70
7.4.160.0090.00916.42
7.4.150.0170.00317.40
7.4.140.0090.00917.86
7.4.130.0140.00616.47
7.4.120.0070.01016.54
7.4.110.0180.00016.66
7.4.100.0130.00316.41
7.4.90.0110.00716.63
7.4.80.0160.00419.39
7.4.70.0100.00616.68
7.4.60.0060.01216.67
7.4.50.0080.00016.48
7.4.40.0080.00916.27
7.4.30.0040.01216.59
7.4.00.0030.01214.75
7.3.330.0070.00013.30
7.3.320.0050.00013.51
7.3.310.0000.00816.37
7.3.300.0000.00716.27
7.3.290.0090.01216.46
7.3.280.0100.00716.43
7.3.270.0100.00717.40
7.3.260.0140.00416.54
7.3.250.0160.00416.38
7.3.240.0080.01116.43
7.3.230.0110.00716.54
7.3.210.0160.00616.63
7.3.200.0120.00619.39
7.3.190.0100.01016.41
7.3.180.0140.00416.54
7.3.170.0110.00716.46
7.3.160.0080.00616.55
7.3.120.0030.00714.91
7.2.330.0200.02016.50
7.2.320.0090.01016.80
7.2.310.0090.01216.85
7.2.300.0030.01416.77
7.2.290.0100.00916.86
7.2.80.0040.00716.70
7.2.60.0080.00317.02
7.2.00.0070.00719.30
7.1.200.0030.01015.91
7.1.100.0030.01018.29
7.1.70.0000.00717.21
7.1.60.0060.01919.46
7.1.50.0070.00716.94
7.1.00.0070.07322.34
7.0.200.0310.00316.82
7.0.140.0000.07722.15
7.0.60.0070.03719.97
7.0.50.0070.05317.92
7.0.40.0100.08320.30
7.0.30.0200.05320.16
7.0.20.0300.07320.10
7.0.10.0030.04320.30
7.0.00.0070.05020.09
5.6.280.0000.07720.93
5.6.210.0000.04320.78
5.6.200.0100.07318.22
5.6.190.0000.09720.34
5.6.180.0030.07020.39
5.6.170.0270.06720.46
5.6.160.0100.06320.51
5.6.150.0070.06018.29
5.6.140.0100.04718.17
5.6.130.0030.07318.18
5.6.120.0170.04721.04
5.6.110.0030.08721.15
5.6.100.0070.07721.15
5.6.90.0070.04721.02
5.6.80.0000.08720.52
5.5.350.0100.07320.34
5.5.340.0000.05317.94
5.5.330.0030.05020.43
5.5.320.0230.03720.32
5.5.310.0270.05020.28
5.5.300.0070.06717.98
5.5.290.0030.05018.08
5.5.280.0100.08020.79
5.5.270.0030.07320.85
5.5.260.0130.07020.90
5.5.250.0000.08720.70
5.5.240.0030.03320.28
5.4.450.0900.05319.46
5.4.440.0530.06319.29
5.4.430.0770.06319.48
5.4.420.1000.06719.55
5.4.410.0470.07719.41
5.4.400.0970.06019.34
5.4.390.0830.06019.23
5.4.380.0100.05718.58
5.4.370.0200.04718.45
5.4.360.0100.05318.75
5.4.350.0130.05318.81
5.4.340.0230.04718.46
5.4.320.0040.03712.51
5.4.310.0060.05112.51
5.4.300.0050.04412.52
5.4.290.0140.03712.50
5.4.280.0070.03512.40
5.4.270.0060.04412.41
5.4.260.0090.03912.41
5.4.250.0080.03712.41
5.4.240.0050.03812.41
5.4.230.0070.03912.40
5.4.220.0080.04512.40
5.4.210.0070.04112.40
5.4.200.0090.03812.39
5.4.190.0060.03712.39
5.4.180.0040.04012.39
5.4.170.0070.03812.40
5.4.160.0080.04312.39
5.4.150.0060.04912.39
5.4.140.0060.03812.07
5.4.130.0070.03512.07
5.4.120.0110.03312.03
5.4.110.0060.04012.02
5.4.100.0090.03612.02
5.4.90.0060.04012.02
5.4.80.0060.04212.02
5.4.70.0070.04312.02
5.4.60.0100.04112.02
5.4.50.0080.04912.02
5.4.40.0060.04812.00
5.4.30.0070.04512.00
5.4.20.0130.04312.00
5.4.10.0090.03512.00
5.4.00.0050.03911.49
5.3.290.0060.03812.80
5.3.280.0090.03612.71
5.3.270.0090.04112.72
5.3.260.0040.05412.72
5.3.250.0070.05512.72
5.3.240.0090.05212.71
5.3.230.0050.05412.71
5.3.220.0040.05712.68
5.3.210.0040.05812.68
5.3.200.0080.05312.68
5.3.190.0070.05212.68
5.3.180.0060.05512.68
5.3.170.0090.05112.67
5.3.160.0070.03712.67
5.3.150.0100.04012.68
5.3.140.0060.03712.66
5.3.130.0060.03912.66
5.3.120.0090.04512.66
5.3.110.0070.04112.66
5.3.100.0060.03812.13
5.3.90.0040.04212.11
5.3.80.0080.03812.11
5.3.70.0080.04812.11
5.3.60.0120.06512.09
5.3.50.0070.04512.04
5.3.40.0080.04412.04
5.3.30.0090.05512.00
5.3.20.0090.04411.78
5.3.10.0090.04811.74
5.3.00.0120.03911.73
5.2.170.0070.0369.23
5.2.160.0080.0389.23
5.2.150.0050.0339.24
5.2.140.0040.0339.23
5.2.130.0050.0319.19
5.2.120.0070.0289.20
5.2.110.0120.0459.20
5.2.100.0100.0379.20
5.2.90.0070.0389.20
5.2.80.0060.0389.19
5.2.70.0050.0379.19
5.2.60.0070.0409.14
5.2.50.0090.0369.11
5.2.40.0080.0309.09
5.2.30.0070.0409.06
5.2.20.0060.0399.05
5.2.10.0070.0388.96
5.2.00.0050.0428.82
5.1.60.0050.0308.10
5.1.50.0060.0268.09
5.1.40.0060.0318.08
5.1.30.0070.0268.43
5.1.20.0040.0288.45
5.1.10.0020.0318.18
5.1.00.0030.0298.18
5.0.50.0090.0266.66
5.0.40.0050.0186.53
5.0.30.0060.0326.33
5.0.20.0070.0266.30
5.0.10.0080.0376.28
5.0.00.0040.0376.28
4.4.90.0050.0214.78
4.4.80.0060.0204.76
4.4.70.0030.0234.76
4.4.60.0050.0174.75
4.4.50.0050.0214.77
4.4.40.0030.0354.70
4.4.30.0030.0234.76
4.4.20.0050.0304.84
4.4.10.0040.0174.85
4.4.00.0010.0284.76
4.3.110.0040.0154.67
4.3.100.0020.0164.66
4.3.90.0040.0134.63
4.3.80.0030.0264.59
4.3.70.0050.0154.63
4.3.60.0060.0204.63
4.3.50.0050.0254.62
4.3.40.0070.0624.54
4.3.30.0040.0223.34
4.3.20.0040.0313.31
4.3.10.0040.0203.27
4.3.00.0100.0277.09

preferences:
40.19 ms | 401 KiB | 5 Q