3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round(strlen($string) / 2); for ($i = 0; $i < round(strlen($string) / 2)-$i; $i++) { $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$strLengthHalf - $i]; } var_dump($substr1); var_dump($substr2); return $string = $substr1.$substr2; } var_dump(reverse('12345'));

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)
8.3.60.0040.01118.56
8.3.50.0110.01021.21
8.3.40.0150.00618.92
8.3.30.0110.00419.29
8.3.20.0040.00420.37
8.3.10.0040.00423.79
8.3.00.0080.00019.51
8.2.180.0180.00016.88
8.2.170.0100.01022.96
8.2.160.0100.00720.38
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0100.00326.16
8.2.120.0040.00422.31
8.2.110.0090.00022.21
8.2.100.0090.00317.88
8.2.90.0000.00819.17
8.2.80.0030.00517.97
8.2.70.0040.00417.75
8.2.60.0000.01018.05
8.2.50.0030.00618.07
8.2.40.0000.00819.88
8.2.30.0000.00718.17
8.2.20.0040.00417.70
8.2.10.0040.00418.24
8.2.00.0050.00217.69
8.1.280.0070.00725.92
8.1.270.0030.00622.18
8.1.260.0070.00026.35
8.1.250.0060.00328.09
8.1.240.0030.00623.98
8.1.230.0080.00319.14
8.1.220.0080.00017.78
8.1.210.0040.00418.77
8.1.200.0000.00817.35
8.1.190.0060.00317.36
8.1.180.0040.00418.10
8.1.170.0050.00318.65
8.1.160.0000.00721.94
8.1.150.0050.00218.84
8.1.140.0040.00417.37
8.1.130.0000.00717.89
8.1.120.0000.00717.45
8.1.110.0030.00417.51
8.1.100.0000.00717.51
8.1.90.0050.00317.52
8.1.80.0000.00717.51
8.1.70.0000.00717.35
8.1.60.0000.00817.60
8.1.50.0000.00817.48
8.1.40.0030.00517.54
8.1.30.0050.00317.75
8.1.20.0040.00417.67
8.1.10.0040.00417.62
8.1.00.0040.00417.64
8.0.300.0000.00718.77
8.0.290.0040.00416.73
8.0.280.0030.00318.43
8.0.270.0000.00717.24
8.0.260.0000.00617.24
8.0.250.0030.00317.05
8.0.240.0070.00017.06
8.0.230.0040.00417.07
8.0.220.0030.00317.05
8.0.210.0000.00616.90
8.0.200.0000.00617.06
8.0.190.0040.00417.05
8.0.180.0070.00017.06
8.0.170.0040.00417.00
8.0.160.0000.00717.07
8.0.150.0040.00416.92
8.0.140.0050.00516.88
8.0.130.0000.00513.49
8.0.120.0040.00417.00
8.0.110.0050.00217.09
8.0.100.0040.00417.00
8.0.90.0040.00417.01
8.0.80.0090.01216.91
8.0.70.0000.00716.89
8.0.60.0000.00717.07
8.0.50.0040.00416.89
8.0.30.0090.01117.34
8.0.20.0120.01117.46
8.0.10.0040.00417.14
8.0.00.0140.00516.93
7.4.330.0030.00315.15
7.4.320.0030.00616.40
7.4.300.0000.00616.68
7.4.290.0040.00416.67
7.4.280.0030.00316.56
7.4.270.0000.00716.65
7.4.260.0000.00816.45
7.4.250.0000.00716.65
7.4.240.0040.00316.62
7.4.230.0030.00316.64
7.4.220.0060.01216.62
7.4.210.0140.00016.60
7.4.200.0040.00416.68
7.4.160.0070.01016.43
7.4.150.0110.01117.40
7.4.140.0120.00617.86
7.4.130.0060.01016.55
7.4.120.0070.01216.56
7.4.110.0130.00616.71
7.4.100.0070.01016.50
7.4.90.0090.01316.58
7.4.80.0110.01419.39
7.4.70.0090.00916.66
7.4.60.0120.00616.56
7.4.50.0020.00216.45
7.4.40.0110.00716.46
7.4.30.0060.00916.64
7.4.10.0040.01114.98
7.4.00.0070.00914.87
7.3.330.0030.00313.44
7.3.320.0030.00313.48
7.3.310.0000.00716.61
7.3.300.0030.00316.54
7.3.290.0060.00816.49
7.3.280.0060.01016.45
7.3.270.0150.00417.40
7.3.260.0100.00716.69
7.3.250.0090.00916.53
7.3.240.0110.00716.52
7.3.230.0080.00816.49
7.3.210.0100.00616.45
7.3.200.0060.01319.39
7.3.190.0060.01216.48
7.3.180.0100.00616.54
7.3.170.0120.01216.73
7.3.160.0100.00716.48
7.3.130.0150.00414.65
7.3.120.0090.00014.76
7.3.110.0060.01215.15
7.3.100.0000.01314.96
7.3.90.0030.00714.99
7.3.80.0130.00014.94
7.3.70.0030.00614.86
7.3.60.0070.00714.74
7.3.50.0040.00414.98
7.3.40.0060.00614.59
7.3.30.0030.01015.02
7.3.20.0060.00616.71
7.3.10.0120.00016.85
7.3.00.0060.00516.46
7.2.330.0070.01116.82
7.2.320.0130.01316.79
7.2.310.0120.01316.80
7.2.300.0120.00616.57
7.2.290.0230.00016.79
7.2.260.0060.01215.30
7.2.250.0030.01815.17
7.2.240.0060.00914.96
7.2.230.0070.00415.01
7.2.220.0060.00915.13
7.2.210.0110.00014.95
7.2.200.0040.00715.15
7.2.190.0060.00614.78
7.2.180.0030.01015.15
7.2.170.0030.00714.80
7.2.160.0080.00315.00
7.2.150.0090.00616.91
7.2.140.0070.01116.60
7.2.130.0060.00816.83
7.2.120.0050.00816.88
7.2.110.0080.00816.85
7.2.100.0030.01117.00
7.2.90.0070.00717.05
7.2.80.0030.01016.93
7.2.70.0050.00716.83
7.2.60.0090.00717.03
7.2.50.0020.01016.94
7.2.40.0080.00616.76
7.2.30.0080.00616.94
7.2.20.0050.00916.64
7.2.10.0070.00716.79
7.2.00.0060.00717.76
7.1.330.0040.00715.83
7.1.320.0070.00715.62
7.1.310.0120.00315.63
7.1.300.0070.01015.56
7.1.290.0000.01315.56
7.1.280.0030.00715.84
7.1.270.0060.01015.63
7.1.260.0040.00915.57
7.1.250.0000.00915.83
7.1.240.0070.00715.77
7.1.230.0050.00815.71
7.1.220.0080.00615.79
7.1.210.0060.00615.79
7.1.200.0070.00315.85
7.1.190.0030.01115.84
7.1.180.0030.00815.77
7.1.170.0050.00715.79
7.1.160.0030.00915.62
7.1.150.0120.00315.72
7.1.140.0060.00615.65
7.1.130.0020.01015.78
7.1.120.0060.00615.81
7.1.110.0060.00815.76
7.1.100.0040.00916.52
7.1.90.0070.00815.79
7.1.80.0010.00915.86
7.1.70.0060.00515.97
7.1.60.0070.00916.94
7.1.50.0050.00916.21
7.1.40.0050.00815.72
7.1.30.0070.00315.79
7.1.20.0070.00415.64
7.1.10.0040.01115.68
7.1.00.0030.02917.80
7.0.330.0030.00515.23
7.0.320.0020.01015.34
7.0.310.0020.01115.29
7.0.300.0050.00415.30
7.0.290.0050.00515.44
7.0.280.0070.00415.35
7.0.270.0070.00515.27
7.0.260.0050.01015.28
7.0.250.0030.00815.58
7.0.240.0060.00215.25
7.0.230.0040.00915.57
7.0.220.0060.00915.47
7.0.210.0060.01015.32
7.0.200.0050.00615.88
7.0.190.0070.00715.26
7.0.180.0020.01115.39
7.0.170.0050.00715.28
7.0.160.0050.00715.35
7.0.150.0050.01015.21
7.0.140.0040.02917.58
7.0.130.0030.00815.37
7.0.120.0050.00715.39
7.0.110.0030.01015.42
7.0.100.0060.00715.46
7.0.90.0050.00515.19
7.0.80.0020.00815.36
7.0.70.0050.00715.25
7.0.60.0050.03116.84
7.0.50.0050.03416.25
7.0.40.0050.02015.56
7.0.30.0140.01515.74
7.0.20.0150.03015.73
7.0.10.0060.01615.66
7.0.00.0070.03015.64
5.6.400.0090.00914.36
5.6.390.0030.01214.14
5.6.380.0060.00614.55
5.6.370.0020.01114.45
5.6.360.0040.00814.34
5.6.350.0030.00914.20
5.6.340.0060.00614.33
5.6.330.0070.00314.20
5.6.320.0000.01114.32
5.6.310.0080.00714.48
5.6.300.0050.00714.21
5.6.290.0010.00914.46
5.6.280.0070.02816.49
5.6.270.0080.00714.20
5.6.260.0030.01014.42
5.6.250.0040.00714.31
5.6.240.0060.00714.40
5.6.230.0060.00714.31
5.6.220.0000.01114.39
5.6.210.0040.01816.40
5.6.200.0010.02015.53
5.6.190.0080.02916.28
5.6.180.0100.02516.42
5.6.170.0110.01916.24
5.6.160.0070.01616.27
5.6.150.0040.02115.49
5.6.140.0030.02415.67
5.6.130.0060.03215.57
5.6.120.0080.01516.47
5.6.110.0060.02916.64
5.6.100.0020.01916.59
5.6.90.0070.03016.65
5.6.80.0050.02616.33
5.6.70.1400.01616.29
5.6.60.0040.00614.16
5.6.50.0040.00914.17
5.6.40.0080.00314.35
5.6.30.0000.01114.31
5.6.20.0080.00414.35
5.6.10.0020.00914.33
5.6.00.0020.00814.26
5.5.380.0050.00412.85
5.5.370.0050.00612.66
5.5.360.0040.00612.88
5.5.350.0080.02815.23
5.5.340.0050.02714.52
5.5.330.0000.02315.30
5.5.320.0130.02215.32
5.5.310.0090.01815.31
5.5.300.0060.01814.72
5.5.290.0050.02814.52
5.5.280.0030.02415.64
5.5.270.0070.02715.25
5.5.260.0050.01715.56
5.5.250.0080.02915.50
5.5.240.0080.01415.13
5.5.230.0030.00612.75
5.5.220.0070.00212.47
5.5.210.0040.00712.70
5.5.200.0020.00812.46
5.5.190.0070.00312.41
5.5.180.0000.00912.56
5.5.170.0010.00912.79
5.5.160.0060.00312.67
5.5.150.0020.00912.64
5.5.140.0050.00512.60
5.5.130.0040.00412.65
5.5.120.0030.00512.67
5.5.110.0050.00512.51
5.5.100.0070.00212.69
5.5.90.0000.01112.74
5.5.80.0030.00812.86
5.5.70.0060.00812.70
5.5.60.0020.01212.63
5.5.50.0030.00612.86
5.5.40.0080.00212.45
5.5.30.0060.00312.74
5.5.20.0020.01012.53
5.5.10.0030.00512.69
5.5.00.0020.01012.57
5.4.450.0290.02113.81
5.4.440.0310.01713.90
5.4.430.0210.02513.89
5.4.420.0220.02414.00
5.4.410.0330.02113.91
5.4.400.0120.02313.70
5.4.390.0270.02413.79
5.4.380.0310.02213.67
5.4.370.0210.02813.83
5.4.360.0190.02713.84
5.4.350.0310.01613.86
5.4.340.0070.01611.40
5.4.330.0020.00610.99
5.4.320.0060.01911.54
5.4.310.0040.02111.49
5.4.300.0040.02011.56
5.4.290.0050.02211.55
5.4.280.0030.02111.70
5.4.270.0050.01911.56
5.4.260.0060.01711.54
5.4.250.0050.01911.64
5.4.240.0040.02011.64
5.4.230.0070.02611.58
5.4.220.0070.02111.45
5.4.210.0070.01811.47
5.4.200.0090.02011.61
5.4.190.0040.02511.53
5.4.180.0050.02611.65
5.4.170.0080.01911.48
5.4.160.0050.02111.57
5.4.150.0070.01811.53
5.4.140.0060.02011.53
5.4.130.0070.01711.49
5.4.120.0060.01911.43
5.4.110.0050.02111.38
5.4.100.0080.01711.51
5.4.90.0030.02111.39
5.4.80.0070.01711.47
5.4.70.0020.02411.44
5.4.60.0080.01711.44
5.4.50.0070.01911.27
5.4.40.0090.01511.31
5.4.30.0070.01811.43
5.4.20.0030.02011.39
5.4.10.0030.01811.46
5.4.00.0040.01611.27
5.3.290.0070.01911.74
5.3.280.0050.02111.72
5.3.270.0030.02311.71
5.3.260.0070.02711.73
5.3.250.0050.02711.71
5.3.240.0090.02511.69
5.3.230.0090.02311.70
5.3.220.0050.02011.64
5.3.210.0040.02111.64
5.3.200.0070.02011.66
5.3.190.0060.02111.70
5.3.180.0050.02211.56
5.3.170.0040.02111.72
5.3.160.0060.01911.68
5.3.150.0080.01911.73
5.3.140.0050.02311.71
5.3.130.0080.02311.72
5.3.120.0050.02111.58
5.3.110.0060.02111.69
5.3.100.0050.02111.28
5.3.90.0040.02511.31
5.3.80.0050.02411.37
5.3.70.0100.02011.24
5.3.60.0050.02111.34
5.3.50.0050.02111.22
5.3.40.0040.02111.32
5.3.30.0070.01511.31
5.3.20.0040.02211.19
5.3.10.0060.02511.07
5.3.00.0050.02811.04
5.2.170.0070.0259.59
5.2.160.0050.0239.59
5.2.150.0040.0249.59
5.2.140.0040.0209.59
5.2.130.0020.0219.57
5.2.120.0020.0189.57
5.2.110.0050.0149.57
5.2.100.0030.0179.57
5.2.90.0030.0199.57
5.2.80.0050.0209.57
5.2.70.0020.0219.57
5.2.60.0030.0199.54
5.2.50.0070.0169.53
5.2.40.0040.0159.52
5.2.30.0040.0189.50
5.2.20.0030.0199.50
5.2.10.0050.0169.45
5.2.00.0040.0199.38
5.1.60.0020.0169.03
5.1.50.0040.0169.02
5.1.40.0060.0139.01
5.1.30.0050.0149.19
5.1.20.0070.0179.20
5.1.10.0040.0169.06
5.1.00.0030.0179.06
5.0.50.0040.0188.30
5.0.40.0030.0128.24
5.0.30.0060.0188.14
5.0.20.0060.0198.13
5.0.10.0050.0108.12
5.0.00.0040.0198.11
4.4.90.0020.0157.36
4.4.80.0030.0127.35
4.4.70.0030.0127.35
4.4.60.0040.0117.35
4.4.50.0020.0107.36
4.4.40.0020.0167.33
4.4.30.0040.0097.35
4.4.20.0020.0087.40
4.4.10.0040.0157.39
4.4.00.0020.0197.35
4.3.110.0010.0127.31
4.3.100.0020.0107.30
4.3.90.0020.0097.29
4.3.80.0020.0197.26
4.3.70.0020.0097.29
4.3.60.0020.0107.29
4.3.50.0010.0137.29
4.3.40.0040.0117.24
4.3.30.0030.0096.63
4.3.20.0000.0136.62
4.3.10.0000.0146.60
4.3.00.0030.0138.41

preferences:
39.38 ms | 401 KiB | 5 Q