3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = "abcdefgh"; for ($i = 0, $len = mb_strlen($s)-1; $i < $len; $i++, $len--) { $s[$i] = $s[$i] ^ $s[$len]; $s[$len] = $s[$len] ^ $s[$i]; $s[$i] = $s[$i] ^ $s[$len]; } echo $s;

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)
8.3.60.0120.00916.35
8.3.50.0110.01021.91
8.3.40.0150.00318.81
8.3.30.0130.00319.02
8.3.20.0000.00720.16
8.3.10.0070.00021.91
8.3.00.0090.00019.51
8.2.180.0170.00318.46
8.2.170.0090.00622.96
8.2.160.0070.00722.17
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0070.00719.79
8.2.110.0000.01019.27
8.2.100.0070.00417.63
8.2.90.0000.00819.19
8.2.80.0040.00417.97
8.2.70.0070.00417.50
8.2.60.0000.00817.93
8.2.50.0000.00818.07
8.2.40.0030.00618.34
8.2.30.0000.00718.17
8.2.20.0070.00017.77
8.2.10.0050.00318.12
8.2.00.0040.00417.59
8.1.280.0100.01025.92
8.1.270.0080.00018.95
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0090.00022.07
8.1.230.0040.00718.76
8.1.220.0030.00517.79
8.1.210.0060.00318.77
8.1.200.0070.00417.35
8.1.190.0030.00517.22
8.1.180.0080.00018.10
8.1.170.0090.00020.42
8.1.160.0000.00721.93
8.1.150.0040.00418.88
8.1.140.0000.00717.45
8.1.130.0000.00617.70
8.1.120.0040.00317.48
8.1.110.0070.00017.35
8.1.100.0040.00417.33
8.1.90.0020.00517.38
8.1.80.0070.00017.48
8.1.70.0020.00517.41
8.1.60.0030.00617.60
8.1.50.0000.00817.59
8.1.40.0020.00517.57
8.1.30.0000.00817.73
8.1.20.0070.00017.69
8.1.10.0000.00717.66
8.1.00.0040.00517.54
8.0.300.0000.00718.77
8.0.290.0040.00416.75
8.0.280.0070.00018.50
8.0.270.0070.00016.87
8.0.260.0030.00317.22
8.0.250.0000.00717.06
8.0.240.0040.00416.98
8.0.230.0000.00816.91
8.0.220.0030.00316.95
8.0.210.0070.00016.83
8.0.200.0030.00316.85
8.0.190.0070.00016.92
8.0.180.0000.00716.94
8.0.170.0040.00416.89
8.0.160.0000.00716.98
8.0.150.0030.00316.90
8.0.140.0050.00216.92
8.0.130.0000.00613.37
8.0.120.0000.00816.98
8.0.110.0040.00416.86
8.0.100.0040.00416.80
8.0.90.0040.00416.78
8.0.80.0130.01016.90
8.0.70.0040.00417.01
8.0.60.0050.00216.90
8.0.50.0000.00816.98
8.0.30.0120.00617.09
8.0.20.0090.00917.40
8.0.10.0000.00716.96
8.0.00.0090.00816.67
7.4.330.0000.00515.08
7.4.320.0030.00316.40
7.4.300.0060.00016.50
7.4.290.0030.00316.61
7.4.280.0030.00516.47
7.4.270.0000.00716.49
7.4.260.0030.00316.55
7.4.250.0050.00316.60
7.4.240.0020.00616.52
7.4.230.0040.00416.40
7.4.220.0150.00416.61
7.4.210.0060.01016.54
7.4.200.0030.00616.70
7.4.160.0030.01316.44
7.4.150.0150.00317.40
7.4.140.0080.01417.86
7.4.130.0090.00816.46
7.4.120.0100.00716.50
7.4.110.0120.00916.61
7.4.100.0170.00016.67
7.4.90.0100.01316.56
7.4.80.0170.00616.56
7.4.70.0070.01116.57
7.4.60.0150.00316.43
7.4.50.0000.00716.54
7.4.40.0090.00916.59
7.4.30.0140.00616.56
7.4.10.0040.01515.03
7.4.00.0030.01114.80
7.3.330.0000.00513.09
7.3.320.0080.00413.02
7.3.310.0030.00316.23
7.3.300.0000.00716.26
7.3.290.0060.00916.26
7.3.280.0100.00616.25
7.3.270.0120.00917.40
7.3.260.0130.00416.45
7.3.250.0090.01116.38
7.3.240.0150.00916.36
7.3.230.0070.01716.39
7.3.210.0030.01316.28
7.3.200.0150.00619.39
7.3.190.0060.01316.37
7.3.180.0070.00716.35
7.3.170.0150.00616.46
7.3.160.0120.00416.52
7.3.130.0090.00614.70
7.3.120.0030.01314.79
7.3.110.0090.00915.05
7.3.100.0100.00315.02
7.3.90.0070.00714.53
7.3.80.0100.00415.12
7.3.70.0090.00314.75
7.3.60.0040.00714.58
7.3.50.0070.00714.80
7.3.40.0000.01014.92
7.3.30.0120.00314.76
7.3.20.0000.01516.58
7.3.10.0100.00316.80
7.3.00.0040.00716.83
7.2.330.0100.00716.95
7.2.320.0710.01516.52
7.2.310.0090.01216.59
7.2.300.0080.00916.35
7.2.290.0100.01316.84
7.2.260.0060.01315.13
7.2.250.0070.01014.94
7.2.240.0030.01315.27
7.2.230.0040.01115.04
7.2.220.0090.00615.08
7.2.210.0070.01015.36
7.2.200.0060.00614.98
7.2.190.0000.01414.97
7.2.180.0060.01015.18
7.2.170.0000.01114.79
7.2.160.0000.00914.80
7.2.150.0060.00616.59
7.2.140.0070.00416.69
7.2.130.0080.00416.83
7.2.120.0040.01117.02
7.2.110.0000.01016.86
7.2.100.0000.01716.97
7.2.90.0060.00917.15
7.2.80.0090.00317.24
7.2.70.0040.01117.06
7.2.60.0080.00816.91
7.2.50.0030.01217.11
7.2.40.0040.01117.07
7.2.30.0080.00416.93
7.2.20.0030.00916.65
7.2.10.0030.00816.85
7.2.00.0100.00717.04
7.1.330.0070.00715.79
7.1.320.0040.00815.64
7.1.310.0070.00716.03
7.1.300.0000.01415.89
7.1.290.0100.00615.84
7.1.280.0030.01015.50
7.1.270.0000.00815.75
7.1.260.0030.01216.07
7.1.250.0040.00415.88
7.1.240.0030.01015.75
7.1.230.0060.00615.79
7.1.220.0000.01515.80
7.1.210.0030.01215.75
7.1.200.0060.00415.99
7.1.190.0030.00915.94
7.1.180.0030.00915.62
7.1.170.0090.00615.97
7.1.160.0040.00415.75
7.1.150.0070.00715.70
7.1.140.0110.00315.92
7.1.130.0060.00615.71
7.1.120.0030.00715.87
7.1.110.0030.00915.86
7.1.100.0070.00715.97
7.1.90.0040.00815.91
7.1.80.0110.00015.89
7.1.70.0040.00616.48
7.1.60.0020.01116.53
7.1.50.0070.00316.21
7.1.40.0070.00416.13
7.1.30.0020.01016.33
7.1.20.0030.00616.42
7.1.10.0060.00616.32
7.1.00.0050.00816.30
7.0.330.0070.00715.53
7.0.320.0000.01115.38
7.0.310.0000.01015.26
7.0.300.0000.01115.21
7.0.290.0070.00715.33
7.0.280.0070.00315.43
7.0.270.0040.00715.46
7.0.260.0090.00615.36
7.0.250.0000.00915.28
7.0.240.0110.00315.46
7.0.230.0070.00715.59
7.0.220.0070.00315.41
7.0.210.0030.01015.21
7.0.200.0020.01016.12
7.0.190.0060.00316.07
7.0.180.0000.01015.89
7.0.170.0030.00815.73
7.0.160.0040.00315.92
7.0.150.0060.00315.73
7.0.140.0070.00215.91
7.0.130.0020.01115.98
7.0.120.0060.00316.02
7.0.110.0030.00815.97
7.0.100.0060.00415.90
7.0.90.0070.00115.75
7.0.80.0050.00615.98
7.0.70.0020.00715.95
7.0.60.0020.00815.80
7.0.50.0070.00515.98
7.0.40.0050.01014.02
7.0.30.0070.00413.95
7.0.20.0010.00713.93
7.0.10.0050.00713.86
7.0.00.0050.00513.92
5.6.400.0040.00414.78
5.6.390.0040.00714.23
5.6.380.0030.01314.43
5.6.370.0070.00714.45
5.6.360.0090.00314.16
5.6.350.0140.00014.80
5.6.340.0040.00814.58
5.6.330.0030.00614.63
5.6.320.0040.00814.79
5.6.310.0130.00314.66
5.6.300.0070.02117.75
5.6.290.0020.02917.72
5.6.280.0030.02617.83
5.6.270.0030.03417.76
5.6.260.0070.02217.64
5.6.250.0070.02317.43
5.6.240.0060.02417.76
5.6.230.0080.02317.55
5.6.220.0100.02017.63
5.6.210.0030.02717.64
5.6.200.0070.02717.62
5.6.190.0030.02717.69
5.6.180.0000.03517.66
5.6.170.0050.03317.72
5.6.160.0070.04017.66
5.6.150.0060.02317.62
5.6.140.0000.02917.64
5.6.130.0080.04417.82
5.6.120.0060.03117.78
5.6.110.0090.03217.71
5.6.100.0240.02617.64
5.6.90.0050.02617.57
5.6.80.0060.02517.30
5.6.70.0050.02617.25
5.6.60.0040.03217.28
5.6.50.0070.02517.24
5.6.40.0060.02417.33
5.6.30.0080.02317.38
5.6.20.0070.02517.26
5.6.10.0070.02317.34
5.6.00.0020.02817.18
5.5.380.0000.04617.60
5.5.370.0000.04517.46
5.5.360.0000.04217.46
5.5.350.0000.04717.45
5.5.340.0030.04018.07
5.5.330.0070.04017.99
5.5.320.0030.04418.03
5.5.310.0030.04318.02
5.5.300.0000.04618.07
5.5.290.0000.06217.86
5.5.280.0100.07217.97
5.5.270.0030.04918.05
5.5.260.0030.04818.02
5.5.250.0070.04017.84
5.5.240.0030.04717.23
5.5.230.0030.04717.44
5.5.220.0040.04217.36
5.5.210.0000.04617.37
5.5.200.0060.03817.38
5.5.190.0070.04817.29
5.5.180.0000.04817.29
5.5.160.0030.04317.20
5.5.150.0090.04317.41
5.5.140.0040.04017.37
5.5.130.0070.04417.39
5.5.120.0060.03617.29
5.5.110.0070.03817.36
5.5.100.0100.04217.26
5.5.90.0000.05216.99
5.5.80.0060.04117.19
5.5.70.0040.04317.11
5.5.60.0240.04016.98
5.5.50.0100.03217.27
5.5.40.0030.04517.27
5.5.30.0000.04217.20
5.5.20.0060.03817.20
5.5.10.0030.04217.20
5.5.00.0030.04117.17
5.4.450.0030.04419.39
5.4.440.0070.03819.27
5.4.430.0030.04419.46
5.4.420.0000.04719.33
5.4.410.0070.04219.04
5.4.400.0060.03919.14
5.4.390.0030.04319.05
5.4.380.0070.03619.02
5.4.370.0130.03619.07
5.4.360.0030.04219.16
5.4.350.0210.05719.13
5.4.340.0100.03619.04
5.4.320.0070.04619.01
5.4.310.0030.04418.85
5.4.300.0070.03818.98
5.4.290.0070.04219.05
5.4.280.0060.04019.00
5.4.270.0090.04119.02
5.4.260.0070.04019.10
5.4.250.0030.04419.08
5.4.240.0140.04519.01
5.4.230.0060.04219.05
5.4.220.0040.05019.05
5.4.210.0030.06019.13
5.4.200.0000.05518.82
5.4.190.0030.04418.94
5.4.180.0030.05219.05
5.4.170.0000.07018.82
5.4.160.0030.04419.04
5.4.150.0090.03419.08
5.4.140.0070.04016.39
5.4.130.0030.03516.60
5.4.120.0090.02916.56
5.4.110.0070.03816.69
5.4.100.0060.03616.50
5.4.90.0070.03716.59
5.4.80.0000.04916.62
5.4.70.0030.03916.40
5.4.60.0140.03716.64
5.4.50.0040.04316.48
5.4.40.0030.03716.61
5.4.30.0000.04016.39
5.4.20.0090.03116.57
5.4.10.0030.04116.58
5.4.00.0060.03115.77
5.3.290.0030.04114.67
5.3.280.0030.04014.77
5.3.270.0030.05014.71
5.3.260.0030.04014.57
5.3.250.0000.03914.58
5.3.240.0040.03614.73
5.3.230.0100.03214.64
5.3.220.0060.03214.74
5.3.210.0060.03814.66
5.3.200.0000.04014.54
5.3.190.0030.04514.53
5.3.180.0060.03514.68
5.3.170.0000.03914.51
5.3.160.0100.03014.54
5.3.150.0030.04014.71
5.3.140.0000.03914.68
5.3.130.0170.03714.70
5.3.120.0000.04614.34
5.3.110.0030.04214.65
5.3.100.0040.03714.13
5.3.90.0000.04314.13
5.3.80.0000.03814.13
5.3.70.0000.03814.14
5.3.60.0060.03114.13
5.3.50.0000.03914.13
5.3.40.0030.03414.13
5.3.30.0000.03714.13
5.3.20.0000.03614.13
5.3.10.0000.05514.13
5.3.00.0000.03614.13
5.2.170.0000.04214.13
5.2.160.0070.02614.13
5.2.150.0040.02814.13
5.2.140.0030.03114.13
5.2.130.0030.03214.13
5.2.120.0000.03014.13
5.2.110.0000.03314.13
5.2.100.0030.03114.13
5.2.90.0060.03714.13
5.2.80.0000.04514.13
5.2.70.0030.02814.13
5.2.60.0070.03414.13
5.2.50.0060.02514.13
5.2.40.0090.02714.13
5.2.30.0030.02914.13
5.2.20.0060.02714.13
5.2.10.0000.03114.13
5.2.00.0030.03114.13
5.1.60.0040.02214.13
5.1.50.0030.02314.13
5.1.40.0090.01914.13
5.1.30.0030.02814.13
5.1.20.0030.02514.13
5.1.10.0030.02714.13
5.1.00.0000.02714.13
5.0.50.0000.02514.13
5.0.40.0030.02114.13
5.0.30.0030.02914.13
5.0.20.0000.02114.13
5.0.10.0030.01814.13
5.0.00.0030.02914.13
4.4.90.0000.02614.13
4.4.80.0000.01914.13
4.4.70.0000.01714.13
4.4.60.0000.01914.13
4.4.50.0000.01714.13
4.4.40.0000.02914.13
4.4.30.0050.01614.13
4.4.20.0000.01914.13
4.4.10.0030.01414.13
4.4.00.0040.02514.13
4.3.110.0060.01214.13
4.3.100.0000.01814.13
4.3.90.0030.01414.13
4.3.80.0000.02714.13
4.3.70.0000.01614.13
4.3.60.0000.01814.13
4.3.50.0080.00814.13
4.3.40.0030.02414.13
4.3.30.0000.02214.13
4.3.20.0060.01414.13
4.3.10.0040.01414.13
4.3.00.0000.01714.13

preferences:
44.01 ms | 401 KiB | 5 Q