3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcdefghijklmn"; $arr= str_split($str); $nstr=""; foreach($arr as $k=>$v) { if($k%2!=0){ $nstr.= $v; } } echo strrev($nstr); //"prints" nljhfdb

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)
8.3.60.0140.00718.41
8.3.50.0120.00621.15
8.3.40.0030.01018.67
8.3.30.0110.00419.04
8.3.20.0000.00720.29
8.3.10.0080.00022.06
8.3.00.0000.00822.52
8.2.180.0040.01116.63
8.2.170.0130.00722.96
8.2.160.0070.00719.16
8.2.150.0050.00324.18
8.2.140.0150.00424.66
8.2.130.0090.00926.16
8.2.120.0080.00019.77
8.2.110.0090.00021.99
8.2.100.0040.00819.28
8.2.90.0090.00019.34
8.2.80.0080.00017.97
8.2.70.0030.00617.50
8.2.60.0050.00317.80
8.2.50.0070.00418.07
8.2.40.0000.00818.16
8.2.30.0090.00018.00
8.2.20.0050.00217.59
8.2.10.0040.00417.77
8.2.00.0050.00317.68
8.1.280.0140.00725.92
8.1.270.0060.00318.68
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0090.00023.82
8.1.230.0040.00719.11
8.1.220.0090.00017.79
8.1.210.0000.00818.77
8.1.200.0000.00817.35
8.1.190.0000.00817.41
8.1.180.0050.00318.65
8.1.170.0000.00818.46
8.1.160.0070.00022.07
8.1.150.0030.00718.63
8.1.140.0040.00417.36
8.1.130.0030.00317.95
8.1.120.0000.00717.54
8.1.110.0000.00917.38
8.1.100.0000.00717.46
8.1.90.0000.00817.48
8.1.80.0000.00717.43
8.1.70.0050.00317.41
8.1.60.0030.00617.47
8.1.50.0040.00417.47
8.1.40.0000.00717.41
8.1.30.0040.00417.64
8.1.20.0040.00417.55
8.1.10.0080.00017.43
8.1.00.0000.00817.37
8.0.300.0000.00818.77
8.0.290.0030.00316.93
8.0.280.0000.00718.45
8.0.270.0030.00317.21
8.0.260.0080.00016.87
8.0.250.0040.00416.97
8.0.240.0040.00416.87
8.0.230.0040.00416.96
8.0.220.0000.00716.80
8.0.210.0020.00516.93
8.0.200.0030.00316.96
8.0.190.0030.00316.91
8.0.180.0050.00316.93
8.0.170.0030.00616.94
8.0.160.0070.00016.84
8.0.150.0000.00716.68
8.0.140.0040.00416.86
8.0.130.0000.00513.27
8.0.120.0000.00816.78
8.0.110.0080.00016.80
8.0.100.0030.00516.70
8.0.90.0040.00316.86
8.0.80.0110.00716.86
8.0.70.0000.00817.00
8.0.60.0090.00016.93
8.0.50.0040.00416.77
8.0.30.0120.00917.12
8.0.20.0110.01117.40
8.0.10.0050.00217.07
8.0.00.0140.00516.84
7.4.330.0000.00515.00
7.4.320.0060.00016.50
7.4.300.0030.00316.61
7.4.290.0030.00316.52
7.4.280.0060.00316.54
7.4.270.0000.00816.59
7.4.260.0030.00316.60
7.4.250.0050.00316.57
7.4.240.0040.00416.50
7.4.230.0030.00316.44
7.4.220.0060.01016.54
7.4.210.0110.00316.61
7.4.200.0030.00416.62
7.4.190.0030.00316.66
7.4.160.0100.00716.65
7.4.150.0060.01117.40
7.4.140.0150.00317.86
7.4.130.0090.01116.43
7.4.120.0060.01416.65
7.4.110.0000.01816.39
7.4.100.0060.01216.54
7.4.90.0100.00716.57
7.4.80.0110.01119.39
7.4.70.0110.00516.47
7.4.60.0060.01016.36
7.4.50.0040.00416.38
7.4.40.0120.00322.77
7.4.30.0030.01316.60
7.4.10.0090.00914.84
7.4.00.0070.01114.86
7.3.330.0060.00013.09
7.3.320.0020.00213.16
7.3.310.0030.00316.15
7.3.300.0030.00316.36
7.3.290.0100.00316.38
7.3.280.0080.00716.34
7.3.270.0120.00617.40
7.3.260.0060.01616.43
7.3.250.0110.00616.42
7.3.240.0110.00716.43
7.3.230.0070.01016.49
7.3.210.0130.00316.68
7.3.200.0030.01419.39
7.3.190.0070.01016.39
7.3.180.0090.00916.22
7.3.170.0040.01616.37
7.3.160.0100.00616.58
7.3.130.0030.01414.95
7.3.120.0030.01014.79
7.3.110.0090.01015.12
7.3.100.0070.00814.76
7.3.90.0070.00914.93
7.3.80.0030.01014.86
7.3.70.0040.00714.91
7.3.60.0050.00814.91
7.3.50.0060.00814.99
7.3.40.0020.00714.83
7.3.30.0070.00714.64
7.3.20.0090.00716.70
7.3.10.0050.00916.51
7.3.00.0030.00916.53
7.2.330.0100.00716.39
7.2.320.0040.01816.70
7.2.310.0180.00516.59
7.2.300.0090.00616.75
7.2.290.0090.00916.65
7.2.260.0030.01714.79
7.2.250.0050.01315.19
7.2.240.0070.01015.08
7.2.230.0060.00815.19
7.2.220.0070.01115.12
7.2.210.0070.00714.91
7.2.200.0040.01015.11
7.2.190.0030.01015.10
7.2.180.0020.01115.19
7.2.170.0060.01015.03
7.2.160.0060.01015.14
7.2.150.0070.00717.02
7.2.140.0000.01316.82
7.2.130.0070.00916.74
7.2.120.0060.00816.68
7.2.110.0030.01016.80
7.2.100.0080.00816.82
7.2.90.0120.00316.75
7.2.80.0110.00516.88
7.2.70.0030.00916.88
7.2.60.0050.00916.88
7.2.50.0120.00816.96
7.2.40.0110.00516.80
7.2.30.0060.01216.69
7.2.20.0080.00816.92
7.2.10.0070.01316.86
7.2.00.0080.00917.72
7.1.330.0050.00715.71
7.1.320.0050.01115.60
7.1.310.0030.01115.75
7.1.300.0090.00515.88
7.1.290.0030.01115.79
7.1.280.0040.01115.92
7.1.270.0080.00615.70
7.1.260.0020.00815.78
7.1.250.0100.00315.74
7.1.240.0090.00615.71
7.1.230.0040.01115.55
7.1.220.0030.00916.02
7.1.210.0030.01315.71
7.1.200.0030.00915.93
7.1.190.0110.00615.84
7.1.180.0100.00015.57
7.1.170.0000.01315.93
7.1.160.0110.00415.96
7.1.150.0040.00815.84
7.1.140.0070.00715.96
7.1.130.0040.00715.79
7.1.120.0040.00515.65
7.1.110.0100.00715.94
7.1.100.0060.00817.06
7.1.90.0040.00715.92
7.1.80.0060.00615.78
7.1.70.0050.00716.47
7.1.60.0040.01617.81
7.1.50.0020.01116.40
7.1.40.0080.00315.95
7.1.30.0150.00015.80
7.1.20.0030.00515.88
7.1.10.0060.00615.94
7.1.00.0060.01819.09
7.0.330.0060.00315.47
7.0.320.0080.00015.10
7.0.310.0060.00315.33
7.0.300.0060.00315.27
7.0.290.0030.01015.07
7.0.280.0040.00915.10
7.0.270.0060.00715.21
7.0.260.0090.00315.50
7.0.250.0040.01115.59
7.0.240.0000.00815.29
7.0.230.0040.00715.28
7.0.220.0070.00715.62
7.0.210.0030.00615.51
7.0.200.0020.01416.08
7.0.190.0000.01415.43
7.0.180.0080.00315.55
7.0.170.0070.00315.41
7.0.160.0150.00015.43
7.0.150.0080.00815.29
7.0.140.0040.04018.81
7.0.130.0080.00415.40
7.0.120.0030.01015.62
7.0.110.0040.00415.57
7.0.100.0110.00315.36
7.0.90.0000.01015.19
7.0.80.0140.00015.16
7.0.70.0060.00615.32
7.0.60.0070.03017.61
7.0.50.0070.03216.71
7.0.40.0040.04416.86
7.0.30.0170.03616.92
7.0.20.0130.03716.79
7.0.10.0130.04616.82
7.0.00.0100.04216.88
5.6.400.0040.00914.55
5.6.390.0080.00314.59
5.6.380.0040.01114.62
5.6.370.0040.00413.96
5.6.360.0030.00714.67
5.6.350.0060.00614.33
5.6.340.0040.00714.79
5.6.330.0030.00814.56
5.6.320.0100.00013.89
5.6.310.0030.00614.56
5.6.300.0000.01714.42
5.6.290.0080.00414.29
5.6.280.0040.01114.49
5.6.270.0000.01114.48
5.6.260.0060.00314.29
5.6.250.0040.00814.61
5.6.240.0060.00614.50
5.6.230.0000.01214.61
5.6.220.0070.00314.32
5.6.210.0080.02517.62
5.6.200.0050.03916.38
5.6.190.0020.03117.56
5.6.180.2010.02517.40
5.6.170.0180.03517.44
5.6.160.0100.03817.26
5.6.150.0010.02716.35
5.6.140.0020.02716.26
5.6.130.0030.02916.29
5.6.120.0070.02017.65
5.6.110.0040.04917.61
5.6.100.0110.04117.65
5.6.90.0050.02717.79
5.6.80.0050.04317.34
5.6.70.0150.04017.42
5.6.60.0060.00914.28
5.6.50.0080.00814.26
5.6.40.0110.00714.45
5.6.30.0060.00614.20
5.6.20.0030.00614.52
5.6.10.0080.00414.45
5.6.00.0050.00814.11
5.5.380.0050.00514.38
5.5.370.0100.00314.33
5.5.360.0110.00014.57
5.5.350.0130.04217.42
5.5.340.0080.03816.35
5.5.330.0030.03717.33
5.5.320.0130.02417.13
5.5.310.0130.03317.35
5.5.300.0100.03716.11
5.5.290.0150.03816.07
5.5.280.0080.02117.51
5.5.270.0040.02717.60
5.5.260.0030.05017.50
5.5.250.0070.04517.50
5.5.240.0110.03717.00
5.5.230.0110.00314.21
5.5.220.0060.00614.19
5.5.210.0070.00714.43
5.5.200.0130.00314.05
5.5.190.0030.01213.93
5.5.180.0060.00914.32
5.5.170.0110.00414.13
5.5.160.0040.00814.18
5.5.150.0000.01014.52
5.5.140.0080.00014.51
5.5.130.0060.00614.24
5.5.120.0100.00314.44
5.5.110.0100.00714.38
5.5.100.0000.01514.13
5.5.90.0080.00714.05
5.5.80.0060.00614.32
5.5.70.0100.00314.07
5.5.60.0030.01014.20
5.5.50.0040.01114.04
5.5.40.0040.00814.23
5.5.30.0030.00614.37
5.5.20.0090.00314.05
5.5.10.0040.00413.77
5.5.00.0100.00014.03
5.4.450.0440.03015.66
5.4.440.0330.03215.63
5.4.430.0400.03215.63
5.4.420.0050.03215.60
5.4.410.0430.03615.62
5.4.400.0220.03715.25
5.4.390.0180.03615.21
5.4.380.0250.03015.20
5.4.370.0130.02515.15
5.4.360.0080.03115.25
5.4.350.0070.02811.88
5.4.340.0050.02211.88
5.4.330.0050.00511.79
5.4.320.0080.02012.12
5.4.310.0050.02312.12
5.4.300.0060.02512.12
5.4.290.0060.02212.12
5.4.280.0050.02212.07
5.4.270.0040.02212.07
5.4.260.0070.02112.07
5.4.250.0020.03015.28
5.4.240.0090.02515.33
5.4.230.0050.02815.34
5.4.220.0050.03115.39
5.4.210.0090.02715.33
5.4.200.0100.03515.38
5.4.190.0100.03815.40
5.4.180.0110.02715.26
5.4.170.0050.03215.33
5.4.160.0040.04215.36
5.4.150.0080.02815.25
5.4.140.0080.02614.16
5.4.130.0070.03614.02
5.4.120.0120.03014.10
5.4.110.0080.02514.07
5.4.100.0030.02914.06
5.4.90.0100.02014.13
5.4.80.0090.02313.99
5.4.70.0030.03114.07
5.4.60.0020.03114.14
5.4.50.0030.03013.99
5.4.40.0070.03214.12
5.4.30.0120.02314.03
5.4.20.0020.02814.08
5.4.10.0050.03114.01
5.4.00.0030.03213.82
5.3.290.0050.02712.30
5.3.280.0040.03313.16
5.3.270.0050.02713.21
5.3.260.0100.03713.20
5.3.250.0090.02713.13
5.3.240.0070.02713.04
5.3.230.0070.03013.15
5.3.220.0110.02413.18
5.3.210.0100.02713.12
5.3.200.0050.02813.18
5.3.190.0030.02813.11
5.3.180.0080.02313.07
5.3.170.0050.02813.18
5.3.160.0030.03513.06
5.3.150.0100.03713.10
5.3.140.0050.02713.18
5.3.130.0070.02713.17
5.3.120.0020.03413.19
5.3.110.0160.02513.11
5.3.100.0090.02512.91
5.3.90.0050.02812.82
5.3.80.0080.02812.75
5.3.70.0020.03312.90
5.3.60.0050.03512.94
5.3.50.0030.02712.89
5.3.40.0070.02512.72
5.3.30.0090.03712.92
5.3.20.0080.02312.82
5.3.10.0120.02312.68
5.3.00.0100.02012.64
5.2.170.0070.04011.06
5.2.160.0130.04011.04
5.2.150.0030.04011.14
5.2.140.0030.04311.04
5.2.130.0070.04011.11
5.2.120.0130.04711.02
5.2.110.0030.04010.86
5.2.100.0070.05011.06
5.2.90.0070.04010.98
5.2.80.0070.04011.02
5.2.70.0100.04011.11
5.2.60.0070.04310.96
5.2.50.0130.03011.02
5.2.40.0230.05011.01
5.2.30.0100.03710.98
5.2.20.0100.04010.88
5.2.10.0030.06010.91
5.2.00.0030.04010.72
5.1.60.0100.02710.02
5.1.50.0000.05010.23
5.1.40.0030.03310.21
5.1.30.0030.05010.26
5.1.20.0070.03310.23
5.1.10.0070.04010.15
5.1.00.0170.04310.26
5.0.50.0070.0238.75
5.0.40.0000.0378.46
5.0.30.0000.0438.37
5.0.20.0030.0408.22
5.0.10.0070.0238.13
5.0.00.0000.0508.32
4.4.90.0030.0276.99
4.4.80.0000.0236.99
4.4.70.0030.0307.00
4.4.60.0070.0277.00
4.4.50.0030.0237.00
4.4.40.0030.0337.00
4.4.30.0000.0237.00
4.4.20.0070.0176.99
4.4.10.0100.0136.99
4.4.00.0030.0306.99
4.3.110.0000.0236.99
4.3.100.0000.0236.99
4.3.90.0030.0206.99
4.3.80.0030.0307.00
4.3.70.0030.0207.00
4.3.60.0000.0237.00
4.3.50.0030.0207.00
4.3.40.0000.0337.00
4.3.30.0000.0237.00
4.3.20.0030.0207.00
4.3.10.0030.0237.00
4.3.00.0130.0206.53

preferences:
41.22 ms | 404 KiB | 6 Q