3v4l.org

run code in 300+ PHP versions simultaneously
<?php function IsCasiPalindromo($str){ $count = 0; $idx1 = 0; $idx2 = strlen($str)-1; while($idx1 <= $idx2){ if($str[$idx1] != $str[$idx2]){ $count++; return true; } $idx1++; $idx2--; } return ($count<=1); } echo IsCasiPalindromo("abccba") . '<br>'; echo IsCasiPalindromo("abccbx") . '<br>'; echo IsCasiPalindromo("abccfg") . '<br>';

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)
8.3.60.0100.00718.56
8.3.50.0150.00622.85
8.3.40.0150.00018.76
8.3.30.0070.00718.66
8.3.20.0000.00720.34
8.3.10.0050.00321.87
8.3.00.0040.00419.68
8.2.180.0070.01118.18
8.2.170.0040.01119.09
8.2.160.0100.00722.96
8.2.150.0070.00025.66
8.2.140.0030.00524.66
8.2.130.0040.00426.16
8.2.120.0030.00918.89
8.2.110.0100.00022.18
8.2.100.0040.00719.51
8.2.90.0060.00317.91
8.2.80.0000.00918.04
8.2.70.0080.00017.75
8.2.60.0040.00418.03
8.2.50.0050.00318.10
8.2.40.0080.00020.38
8.2.30.0050.00219.37
8.2.20.0040.00417.73
8.2.10.0080.00018.06
8.2.00.0000.00718.18
8.1.280.0160.00325.92
8.1.270.0050.00224.04
8.1.260.0000.00826.35
8.1.250.0050.00328.09
8.1.240.0060.00322.60
8.1.230.0110.00020.85
8.1.220.0080.00017.79
8.1.210.0030.00618.98
8.1.200.0060.00317.35
8.1.190.0080.00017.35
8.1.180.0030.00518.10
8.1.170.0030.00618.70
8.1.160.0000.00822.19
8.1.150.0040.00419.00
8.1.140.0040.00419.54
8.1.130.0030.00317.62
8.1.120.0040.00417.46
8.1.110.0030.00517.40
8.1.100.0050.00217.39
8.1.90.0040.00417.45
8.1.80.0000.00717.46
8.1.70.0030.00317.49
8.1.60.0040.00417.47
8.1.50.0040.00417.50
8.1.40.0050.00517.52
8.1.30.0000.00817.55
8.1.20.0040.00417.57
8.1.10.0040.00417.45
8.1.00.0000.00717.49
8.0.300.0040.00420.04
8.0.290.0080.00016.75
8.0.280.0000.00718.46
8.0.270.0000.00717.34
8.0.260.0000.00817.21
8.0.250.0000.00616.89
8.0.240.0030.00317.02
8.0.230.0030.00316.98
8.0.220.0000.00716.77
8.0.210.0070.00016.92
8.0.200.0000.00716.92
8.0.190.0030.00616.86
8.0.180.0000.01216.94
8.0.170.0050.00216.96
8.0.160.0040.00416.86
8.0.150.0000.00816.72
8.0.140.0070.00016.81
8.0.130.0000.00613.33
8.0.120.0000.00816.86
8.0.110.0000.00716.97
8.0.100.0000.00716.72
8.0.90.0000.01016.68
8.0.80.0130.00616.93
8.0.70.0000.01016.74
8.0.60.0030.00517.02
8.0.50.0050.00316.84
8.0.30.0070.01117.18
8.0.20.0080.01317.40
8.0.10.0070.00016.84
8.0.00.0080.00816.84
7.4.330.0000.00515.08
7.4.320.0060.00016.47
7.4.300.0030.00516.48
7.4.290.0030.00616.60
7.4.280.0030.00516.51
7.4.270.0080.00016.54
7.4.260.0080.00016.58
7.4.250.0030.00616.57
7.4.240.0000.01016.57
7.4.230.0030.00316.71
7.4.220.0100.01016.50
7.4.210.0100.00816.58
7.4.200.0030.00316.71
7.4.160.0090.00616.45
7.4.150.0100.01317.40
7.4.140.0080.00817.86
7.4.130.0080.00916.65
7.4.120.0120.00716.63
7.4.110.0170.00016.72
7.4.100.0100.00716.43
7.4.90.0030.01316.53
7.4.80.0160.00319.39
7.4.70.0110.00616.66
7.4.60.0110.01016.59
7.4.50.0110.00316.16
7.4.40.0060.01016.52
7.4.30.0100.01316.59
7.4.10.0090.01014.83
7.4.00.0050.01214.73
7.3.330.0000.00513.34
7.3.320.0030.00313.24
7.3.310.0070.00016.40
7.3.300.0030.00316.26
7.3.290.0000.00716.34
7.3.280.0080.00916.39
7.3.270.0070.01017.40
7.3.260.0140.00716.41
7.3.250.0130.01116.58
7.3.240.0140.00316.53
7.3.230.0100.00716.64
7.3.210.0080.00816.43
7.3.200.0090.01316.40
7.3.190.0120.00316.66
7.3.180.0030.01316.32
7.3.170.0110.00716.55
7.3.160.0090.00616.26
7.3.130.0070.01014.72
7.3.120.0000.01814.81
7.3.110.0100.01014.92
7.3.100.0050.00915.03
7.3.90.0080.00514.86
7.3.80.0050.00714.82
7.3.70.0070.00414.73
7.3.60.0040.01114.97
7.3.50.0060.00814.99
7.3.40.0030.01014.78
7.3.30.0040.00814.85
7.3.20.0060.00816.89
7.3.10.0050.01016.85
7.3.00.0060.00616.65
7.2.330.0110.00716.78
7.2.320.0140.00316.79
7.2.310.0110.00816.59
7.2.300.0030.01316.89
7.2.290.0120.00616.80
7.2.260.0110.00815.17
7.2.250.0060.01015.30
7.2.240.0030.01115.19
7.2.230.0060.00915.09
7.2.220.0070.01015.24
7.2.210.0060.00814.87
7.2.200.0020.01115.14
7.2.190.0050.01015.04
7.2.180.0050.00815.16
7.2.170.0040.01114.97
7.2.160.0020.00914.98
7.2.150.0030.01416.92
7.2.140.0050.00917.04
7.2.130.0060.00716.85
7.2.120.0090.00517.02
7.2.110.0050.00817.06
7.2.100.0120.00517.03
7.2.90.0080.00516.90
7.2.80.0080.00717.09
7.2.70.0040.00917.02
7.2.60.0080.00517.00
7.2.50.0030.00816.88
7.2.40.0070.00816.82
7.2.30.0070.00716.90
7.2.20.0070.00616.99
7.2.10.0030.01417.03
7.2.00.0080.00816.99
7.1.330.0050.00915.78
7.1.320.0080.00815.88
7.1.310.0020.01015.71
7.1.300.0040.01015.78
7.1.290.0060.00415.77
7.1.280.0030.01115.64
7.1.270.0020.01215.78
7.1.260.0070.00615.82
7.1.250.0090.00615.77
7.1.240.0060.00715.86
7.1.230.0090.00315.96
7.1.220.0050.00715.79
7.1.210.0060.00715.87
7.1.200.0080.00515.94
7.1.190.0070.00615.88
7.1.180.0020.01115.73
7.1.170.0080.00315.82
7.1.160.0040.01015.73
7.1.150.0070.00615.85
7.1.140.0080.00815.91
7.1.130.0040.01115.47
7.1.120.0070.00715.60
7.1.110.0050.00815.83
7.1.100.0120.00215.79
7.1.90.0050.00915.86
7.1.80.0020.01215.68
7.1.70.0080.00616.13
7.1.60.0040.00717.18
7.1.50.0050.00715.64
7.1.40.0060.00615.85
7.1.30.0050.00815.72
7.1.20.0050.00815.78
7.1.10.0060.00815.86
7.1.00.0050.02917.93
7.0.330.0060.00615.27
7.0.320.0000.01215.44
7.0.310.0100.00415.46
7.0.300.0050.01115.26
7.0.290.0060.00815.49
7.0.280.0090.00315.41
7.0.270.0070.00915.33
7.0.260.0050.00915.42
7.0.250.0050.00915.24
7.0.240.0050.00915.36
7.0.230.0000.01415.50
7.0.220.0090.00515.56
7.0.210.0070.00715.50
7.0.200.0080.00415.24
7.0.190.0090.00415.39
7.0.180.0090.00415.41
7.0.170.0100.00115.36
7.0.160.0030.00815.19
7.0.150.0040.00715.32
7.0.140.0060.00815.48
7.0.130.0050.00815.36
7.0.120.0070.00215.45
7.0.110.0080.00515.29
7.0.100.0030.00815.27
7.0.90.0090.00515.43
7.0.80.0070.00415.39
7.0.70.0140.02716.99
7.0.60.0240.02316.87
7.0.50.0210.02017.15
7.0.40.0200.02115.75
7.0.30.0200.02315.69
7.0.20.0220.01815.77
7.0.10.0190.01915.79
7.0.00.0150.02515.77
5.6.400.0050.00914.42
5.6.390.0100.00514.38
5.6.380.0050.00914.45
5.6.370.0020.01414.17
5.6.360.0030.01214.61
5.6.350.0050.00814.46
5.6.340.0070.00514.63
5.6.330.0080.00714.63
5.6.320.0100.00514.23
5.6.310.0050.00714.53
5.6.300.0030.00814.29
5.6.290.0020.00814.69
5.6.280.0060.02516.68
5.6.270.0060.00814.56
5.6.260.0110.00414.54
5.6.250.0070.00814.64
5.6.240.0040.00714.45
5.6.230.0090.00414.43
5.6.220.0200.02116.52
5.6.210.0230.02616.47
5.6.200.0200.02116.73
5.6.190.0110.02716.59
5.6.180.0210.01516.60
5.6.170.0130.02516.60
5.6.160.0140.02316.63
5.6.150.0180.03516.65
5.6.140.0120.02516.54
5.6.130.0210.02116.45
5.6.120.0070.03116.80
5.6.110.0100.02516.54
5.6.100.0120.02616.54
5.6.90.0210.02816.63
5.6.80.0150.02316.43
5.6.70.0170.02816.30
5.6.60.0100.02916.28
5.6.50.0140.02916.42
5.6.40.0160.02216.30
5.6.30.0180.02816.30
5.6.20.0200.01716.33
5.6.10.0150.02116.28
5.6.00.0180.02216.28
5.5.380.0030.00614.24
5.5.370.0060.00814.42
5.5.360.0150.03016.22
5.5.350.0180.02416.36
5.5.340.0140.02616.49
5.5.330.0200.02516.49
5.5.320.0130.02616.49
5.5.310.0150.02316.61
5.5.300.0140.02316.52
5.5.290.0150.02316.49
5.5.280.0110.02616.50
5.5.270.0160.02416.48
5.5.260.0120.02816.47
5.5.250.0100.02916.31
5.5.240.0150.02316.16
5.5.230.0180.02016.15
5.5.220.0150.02316.24
5.5.210.0140.02516.26
5.5.200.0190.01916.24
5.5.190.0110.02516.31
5.5.180.0140.02616.28
5.5.170.0000.01214.21
5.5.160.0170.02116.42
5.5.150.0160.03016.28
5.5.140.0150.02416.30
5.5.130.0160.02716.31
5.5.120.0220.01716.26
5.5.110.0180.02816.37
5.5.100.0180.02116.24
5.5.90.0140.02116.37
5.5.80.0210.01816.18
5.5.70.0120.02516.17
5.5.60.0130.02216.23
5.5.50.0170.02116.35
5.5.40.0130.02116.28
5.5.30.0110.02516.11
5.5.20.0200.01816.24
5.5.10.0160.01916.23
5.5.00.0120.02316.02

preferences:
33.64 ms | 401 KiB | 5 Q