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] = $s[$i] ^ $s[$len]; $s[$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)
8.3.60.0110.00416.63
8.3.50.0090.00921.86
8.3.40.0140.00419.00
8.3.30.0070.00718.89
8.3.20.0040.00420.30
8.3.10.0080.00021.80
8.3.00.0030.00519.38
8.2.180.0070.01118.05
8.2.170.0110.00422.96
8.2.160.0030.01020.39
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00419.79
8.2.110.0030.00720.56
8.2.100.0080.00317.91
8.2.90.0040.00417.84
8.2.80.0000.01117.97
8.2.70.0000.00917.63
8.2.60.0050.00318.05
8.2.50.0040.00418.07
8.2.40.0090.00019.88
8.2.30.0040.00418.05
8.2.20.0000.00817.66
8.2.10.0040.00418.13
8.2.00.0050.00317.80
8.1.280.0070.01125.92
8.1.270.0080.00020.63
8.1.260.0040.00426.35
8.1.250.0050.00228.09
8.1.240.0090.00019.42
8.1.230.0040.00720.85
8.1.220.0040.00417.74
8.1.210.0050.00318.96
8.1.200.0060.00317.47
8.1.190.0080.00017.23
8.1.180.0060.00318.10
8.1.170.0000.00820.36
8.1.160.0020.00522.06
8.1.150.0040.00418.76
8.1.140.0000.00717.49
8.1.130.0040.00417.78
8.1.120.0070.00017.35
8.1.110.0000.00717.41
8.1.100.0000.00717.41
8.1.90.0040.00417.48
8.1.80.0040.00417.41
8.1.70.0030.00317.33
8.1.60.0000.00717.66
8.1.50.0030.00517.55
8.1.40.0070.00017.59
8.1.30.0030.00517.68
8.1.20.0000.00717.64
8.1.10.0050.00317.57
8.1.00.0030.00617.48
8.0.300.0000.00719.96
8.0.290.0060.00316.75
8.0.280.0040.00418.50
8.0.270.0030.00317.27
8.0.260.0040.00417.24
8.0.250.0030.00317.00
8.0.240.0050.00316.99
8.0.230.0000.00717.00
8.0.220.0030.00316.93
8.0.210.0000.00716.86
8.0.200.0070.00316.97
8.0.190.0050.00216.91
8.0.180.0000.00716.90
8.0.170.0000.00716.98
8.0.160.0050.00216.83
8.0.150.0000.00716.79
8.0.140.0000.00716.91
8.0.130.0030.00313.42
8.0.120.0100.00016.90
8.0.110.0000.00716.95
8.0.100.0000.00716.82
8.0.90.0040.00416.84
8.0.80.0070.01017.01
8.0.70.0070.00016.89
8.0.60.0070.00016.77
8.0.50.0030.00516.84
8.0.30.0140.00917.06
8.0.20.0120.00917.40
8.0.10.0070.00016.98
8.0.00.0140.00816.86
7.4.330.0000.00515.23
7.4.320.0030.00316.59
7.4.300.0070.00016.63
7.4.290.0000.00716.50
7.4.280.0000.00716.58
7.4.270.0000.00616.39
7.4.260.0070.00016.43
7.4.250.0050.00216.49
7.4.240.0060.00216.51
7.4.230.0030.00316.61
7.4.220.0030.01416.50
7.4.210.0090.00816.59
7.4.200.0000.00716.66
7.4.160.0060.01116.48
7.4.150.0060.01317.40
7.4.140.0120.00817.86
7.4.130.0130.00316.50
7.4.120.0100.00616.59
7.4.110.0060.01216.72
7.4.100.0110.01116.38
7.4.90.0100.01016.54
7.4.80.0130.00719.39
7.4.70.0100.00716.48
7.4.60.0090.00616.51
7.4.50.0000.00816.32
7.4.40.0070.01016.56
7.4.30.0110.01116.25
7.4.10.0030.01614.94
7.4.00.0130.00414.70
7.3.330.0020.00213.06
7.3.320.0080.00413.20
7.3.310.0030.00316.26
7.3.300.0030.00316.29
7.3.290.0040.00216.16
7.3.280.0060.01116.27
7.3.270.0140.00317.40
7.3.260.0130.01016.21
7.3.250.0070.01016.53
7.3.240.0080.00816.30
7.3.230.0030.01316.39
7.3.210.0130.00316.58
7.3.200.0080.01519.39
7.3.190.0050.01116.35
7.3.180.0070.01016.34
7.3.170.0110.00516.31
7.3.160.0100.00716.36
7.3.130.0070.00714.79
7.3.120.0090.00814.98
7.3.110.0100.00814.62
7.3.100.0030.01014.78
7.3.90.0080.00914.77
7.3.80.0080.01214.69
7.3.70.0050.00814.67
7.3.60.0080.00514.75
7.3.50.0070.00814.79
7.3.40.0090.00614.74
7.3.30.0050.00914.81
7.3.20.0080.00516.77
7.3.10.0080.00916.41
7.3.00.0080.01016.52
7.2.330.0060.01116.63
7.2.320.0130.00316.41
7.2.310.0070.01016.88
7.2.300.0070.01016.89
7.2.290.0110.00716.84
7.2.260.0020.01615.04
7.2.250.0080.01115.14
7.2.240.0050.01014.89
7.2.230.0090.00815.03
7.2.220.0080.00815.11
7.2.210.0020.00814.92
7.2.200.0050.01114.79
7.2.190.0120.00515.05
7.2.180.0100.00615.07
7.2.170.0070.00914.96
7.2.160.0040.01314.88
7.2.150.0100.00616.80
7.2.140.0060.00616.90
7.2.130.0120.00516.88
7.2.120.0140.00616.64
7.2.110.0100.01116.69
7.2.100.0130.00716.64
7.2.90.0120.00716.69
7.2.80.0070.01016.76
7.2.70.0100.00916.70
7.2.60.0100.00816.66
7.2.50.0140.00616.63
7.2.40.0080.00816.61
7.2.30.0100.00816.57
7.2.20.0120.00516.63
7.2.10.0060.00916.67
7.2.00.0090.00817.20
7.1.330.0030.01015.77
7.1.320.0070.00715.81
7.1.310.0030.00915.82
7.1.300.0040.00915.49
7.1.290.0050.01115.78
7.1.280.0020.01215.71
7.1.270.0090.00415.60
7.1.260.0050.00815.74
7.1.250.0120.00915.61
7.1.240.0090.00415.66
7.1.230.0050.00715.85
7.1.220.0020.00915.68
7.1.210.0030.00915.69
7.1.200.0050.00815.78
7.1.190.0030.00915.85
7.1.180.0080.00515.78
7.1.170.0060.00415.89
7.1.160.0110.00315.79
7.1.150.0070.00715.83
7.1.140.0050.00915.93
7.1.130.0060.00815.54
7.1.120.0070.00515.86
7.1.110.0020.01215.80
7.1.100.0100.00516.68
7.1.90.0050.00815.75
7.1.80.0060.00615.74
7.1.70.0040.00816.17
7.1.60.0080.00716.96
7.1.50.0040.01016.21
7.1.40.0080.00615.81
7.1.30.0070.00415.84
7.1.20.0020.00915.71
7.1.10.0050.00515.94
7.1.00.0040.03218.05
7.0.330.0030.00715.27
7.0.320.0070.00715.47
7.0.310.0010.00715.16
7.0.300.0030.00815.45
7.0.290.0040.01015.27
7.0.280.0020.01015.41
7.0.270.0040.00915.17
7.0.260.0040.00515.41
7.0.250.0040.00915.36
7.0.240.0030.00915.36
7.0.230.0080.00415.40
7.0.220.0040.00915.17
7.0.210.0080.00415.49
7.0.200.0050.00515.70
7.0.190.0030.00715.35
7.0.180.0020.01115.44
7.0.170.0050.00815.35
7.0.160.0070.00315.49
7.0.150.0040.00615.46
7.0.140.0060.02817.64
7.0.130.0000.01015.45
7.0.120.0050.00815.22
7.0.110.0020.00915.41
7.0.100.0020.01215.37
7.0.90.0040.00915.19
7.0.80.0040.00715.07
7.0.70.0030.01015.13
7.0.60.0030.02216.88
7.0.50.0070.02216.21
7.0.40.0070.02515.70
7.0.30.0150.02315.70
7.0.20.0160.02515.80
7.0.10.0170.02515.87
7.0.00.0040.02515.77
5.6.400.0080.00814.62
5.6.390.0090.00414.46
5.6.380.0030.01014.40
5.6.370.0060.00614.35
5.6.360.0060.00614.20
5.6.350.0020.01114.24
5.6.340.0030.00814.29
5.6.330.0030.01014.39
5.6.320.0020.01114.28
5.6.310.0020.01514.50
5.6.300.0090.00614.55
5.6.290.0060.00914.33
5.6.280.0050.02816.54
5.6.270.0040.00914.59
5.6.260.0030.01014.25
5.6.250.0060.00814.46
5.6.240.0060.00714.46
5.6.230.0040.01014.24
5.6.220.0070.00714.22
5.6.210.0040.02016.50
5.6.200.0030.03115.56
5.6.190.0050.03416.28
5.6.180.0160.02716.36
5.6.170.0110.01716.35
5.6.160.0050.02916.58
5.6.150.0100.01315.67
5.6.140.0020.01815.63
5.6.130.0040.02615.71
5.6.120.0050.02616.59
5.6.110.0050.03516.56
5.6.100.0050.01816.50
5.6.90.0060.03416.63
5.6.80.0070.02616.40
5.6.70.0130.01716.37
5.6.60.0070.00714.19
5.6.50.0050.00714.27
5.6.40.0050.01014.39
5.6.30.0060.00614.31
5.6.20.0070.00414.27
5.6.10.0060.00514.23
5.6.00.0080.00514.26
5.5.380.0030.01114.22
5.5.370.0040.01014.19
5.5.360.0090.00614.21
5.5.350.0080.02716.31
5.5.340.0080.02915.62
5.5.330.0030.03016.27
5.5.320.0120.02816.50
5.5.310.0130.01816.18
5.5.300.0040.02315.61
5.5.290.0090.02415.49
5.5.280.0030.02616.43
5.5.270.0080.03316.65
5.5.260.0060.01916.57
5.5.250.0030.03516.58
5.5.240.0090.02816.34
5.5.230.0030.01114.04
5.5.220.0080.00814.39
5.5.210.0020.01214.24
5.5.200.0080.00614.25
5.5.190.0040.00414.35
5.5.180.0070.00414.16
5.5.170.0060.00614.10
5.5.160.0080.00514.07
5.5.150.0060.00414.26
5.5.140.0070.00514.12
5.5.130.0030.00814.37
5.5.120.0060.00914.53
5.5.110.0050.01014.36
5.5.100.0030.01014.02
5.5.90.0060.00414.06
5.5.80.0070.00614.00
5.5.70.0050.00714.12
5.5.60.0080.00714.20
5.5.50.0090.00514.20
5.5.40.0080.00414.15
5.5.30.0050.00714.11
5.5.20.0030.01014.16
5.5.10.0050.00814.19
5.5.00.0030.00813.84
5.4.450.0250.02014.70
5.4.440.0320.02214.75
5.4.430.0440.01814.76
5.4.420.0320.02414.61
5.4.410.0350.02914.74
5.4.400.0210.02514.35
5.4.390.0200.02214.48
5.4.380.0180.02114.43
5.4.370.0210.02314.48
5.4.360.0170.02114.50
5.4.350.0200.02314.42
5.4.340.0130.02014.44
5.4.330.0030.00512.26
5.4.320.0120.02914.38
5.4.310.0170.02514.52
5.4.300.0180.02114.41
5.4.290.0210.02014.47
5.4.280.0120.02514.43
5.4.270.0190.02314.42
5.4.260.0170.02114.47
5.4.250.0140.02314.49
5.4.240.0140.02014.34
5.4.230.0120.02414.42
5.4.220.0120.02214.49
5.4.210.0110.02314.42
5.4.200.0100.02713.80
5.4.190.0200.02114.50
5.4.180.0200.02514.40
5.4.170.0160.03114.42
5.4.160.0260.02114.47
5.4.150.0120.02414.38
5.4.140.0180.02113.75
5.4.130.0140.02513.74
5.4.120.0100.02213.72
5.4.110.0120.02213.52
5.4.100.0150.02413.69
5.4.90.0200.02313.70
5.4.80.0120.03313.58
5.4.70.0180.02713.63
5.4.60.0170.02313.65
5.4.50.0160.01813.64
5.4.40.0220.02513.68
5.4.30.0200.02113.61
5.4.20.0150.02313.58
5.4.10.0140.02613.63
5.4.00.0170.02113.51
5.3.290.0270.05714.64
5.3.280.0300.06014.59
5.3.270.0470.06314.57
5.3.260.0270.06714.59
5.3.250.0370.05714.57
5.3.240.0370.07014.64
5.3.230.0400.05014.49
5.3.220.0330.05314.57
5.3.210.0330.05714.57
5.3.200.0330.05714.49
5.3.190.0500.06014.57
5.3.180.0470.07014.65
5.3.170.0430.06314.68
5.3.160.0370.05714.66
5.3.150.0370.05314.65
5.3.140.0430.07014.65
5.3.130.0300.06314.53
5.3.120.0300.06014.50
5.3.110.0300.08014.46
5.3.100.0370.05314.03
5.3.90.0630.05014.11
5.3.80.0270.06014.13
5.3.70.0400.07014.13
5.3.60.0400.06713.92
5.3.50.0200.06713.84
5.3.40.0370.05013.94
5.3.30.0300.06013.89
5.3.20.0330.04713.66
5.3.10.0330.05013.64
5.3.00.0300.05713.63
5.2.170.0230.05711.18
5.2.160.0300.04011.28
5.2.150.0270.06711.14
5.2.140.0270.06011.11
5.2.130.0300.05011.07
5.2.120.0200.05011.05
5.2.110.0230.04711.08
5.2.100.0170.05311.05
5.2.90.0230.04311.07
5.2.80.0230.03711.05
5.2.70.0430.04011.14
5.2.60.0300.05711.09
5.2.50.0200.05010.99
5.2.40.0230.04011.05
5.2.30.0300.04010.95
5.2.20.0170.04311.11
5.2.10.0230.03310.83
5.2.00.0230.04310.80
5.1.60.0300.04310.04
5.1.50.0330.05010.05
5.1.40.0300.04710.08
5.1.30.0300.05310.48
5.1.20.0430.03310.44
5.1.10.0170.04010.10
5.1.00.0170.04710.18
5.0.50.0170.0278.66
5.0.40.0130.0278.52
5.0.30.0100.0508.19
5.0.20.0200.0278.37
5.0.10.0130.0338.19
5.0.00.0270.0378.20
4.4.90.0100.0235.90
4.4.80.0130.0335.90
4.4.70.0230.0235.86
4.4.60.0170.0305.89
4.4.50.0230.0275.88
4.4.40.0170.0435.89
4.4.30.0170.0275.82
4.4.20.0100.0335.95
4.4.10.0130.0205.88
4.4.00.0170.0405.91
4.3.110.0130.0305.88
4.3.100.0100.0205.81
4.3.90.0070.0305.88
4.3.80.0200.0335.77
4.3.70.0070.0275.79
4.3.60.0170.0205.79
4.3.50.0000.0375.82
4.3.40.0130.0335.84
4.3.30.0070.0234.99
4.3.20.0100.0234.99
4.3.10.0070.0274.99
4.3.00.0170.0207.12

preferences:
73.41 ms | 401 KiB | 5 Q