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++; echo 'false'; } $idx1++; $idx2--; } return true; } 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)
8.3.60.0090.01218.28
8.3.50.0040.01119.64
8.3.40.0070.00718.64
8.3.30.0080.00618.75
8.3.20.0080.00020.12
8.3.10.0050.00221.69
8.3.00.0080.00019.79
8.2.180.0140.00418.61
8.2.170.0100.01019.09
8.2.160.0030.01722.96
8.2.150.0110.00425.66
8.2.140.0080.00024.66
8.2.130.0080.00020.47
8.2.120.0060.00326.35
8.2.110.0030.00622.25
8.2.100.0120.00019.76
8.2.90.0080.00018.03
8.2.80.0000.00818.04
8.2.70.0040.00417.50
8.2.60.0030.00617.93
8.2.50.0040.00418.10
8.2.40.0030.00520.59
8.2.30.0050.00219.20
8.2.20.0070.00017.67
8.2.10.0000.00718.13
8.2.00.0000.00717.96
8.1.280.0120.00625.92
8.1.270.0070.00023.79
8.1.260.0050.00228.09
8.1.250.0040.00428.09
8.1.240.0060.00322.59
8.1.230.0090.00320.88
8.1.220.0040.00417.74
8.1.210.0000.00818.84
8.1.200.0030.00617.35
8.1.190.0000.00917.25
8.1.180.0030.00618.10
8.1.170.0060.00318.63
8.1.160.0000.00822.06
8.1.150.0000.00818.90
8.1.140.0030.00519.64
8.1.130.0000.00717.70
8.1.120.0000.00717.43
8.1.110.0050.00517.48
8.1.100.0050.00317.46
8.1.90.0000.00717.49
8.1.80.0000.00717.35
8.1.70.0030.00317.48
8.1.60.0000.00717.54
8.1.50.0000.00817.44
8.1.40.0070.00317.46
8.1.30.0000.00817.67
8.1.20.0040.00417.66
8.1.10.0040.00417.58
8.1.00.0000.00717.49
8.0.300.0040.00420.03
8.0.290.0000.00816.75
8.0.280.0080.00018.38
8.0.270.0070.00016.83
8.0.260.0000.00617.18
8.0.250.0050.00216.96
8.0.240.0030.00616.97
8.0.230.0000.00816.98
8.0.220.0070.00016.82
8.0.210.0050.00316.76
8.0.200.0040.00416.94
8.0.190.0050.00516.93
8.0.180.0040.00416.93
8.0.170.0000.00716.81
8.0.160.0030.00616.99
8.0.150.0070.00016.81
8.0.140.0050.00316.84
8.0.130.0030.00313.34
8.0.120.0000.00816.88
8.0.110.0070.00016.94
8.0.100.0050.00216.79
8.0.90.0030.00416.92
8.0.80.0060.01216.91
8.0.70.0060.00316.70
8.0.60.0040.00416.96
8.0.50.0000.00716.71
8.0.30.0130.00417.22
8.0.20.0110.01017.40
8.0.10.0000.00717.08
8.0.00.0150.00916.82
7.4.330.0020.00215.16
7.4.320.0030.00316.57
7.4.300.0070.00016.57
7.4.290.0040.00416.62
7.4.280.0040.00416.61
7.4.270.0030.00616.68
7.4.260.0040.00416.51
7.4.250.0040.00416.59
7.4.240.0000.00816.63
7.4.230.0050.00316.43
7.4.220.0060.01616.69
7.4.210.0060.00916.49
7.4.200.0000.00716.62
7.4.160.0120.00916.50
7.4.150.0030.01417.40
7.4.140.0070.01017.86
7.4.130.0090.00916.52
7.4.120.0070.01016.58
7.4.110.0070.01116.57
7.4.100.0080.00816.48
7.4.90.0100.00716.32
7.4.80.0090.01519.39
7.4.70.0100.00616.64
7.4.60.0180.00016.36
7.4.50.0060.01016.52
7.4.40.0030.01316.57
7.4.30.0070.01616.64
7.4.10.0070.00715.11
7.4.00.0090.00614.84
7.3.330.0030.00313.36
7.3.320.0050.00013.30
7.3.310.0000.00716.41
7.3.300.0000.00716.39
7.3.290.0060.00016.30
7.3.280.0080.00716.40
7.3.270.0130.00817.40
7.3.260.0080.00916.48
7.3.250.0130.00816.38
7.3.240.0110.00616.39
7.3.230.0070.01016.39
7.3.210.0100.00616.57
7.3.200.0150.00016.37
7.3.190.0110.00416.68
7.3.180.0120.00916.26
7.3.170.0130.00316.43
7.3.160.0060.01316.67
7.3.130.0000.01415.15
7.3.120.0070.01114.67
7.3.110.0070.01114.73
7.3.100.0090.00614.83
7.3.90.0060.00814.80
7.3.80.0070.00914.77
7.3.70.0080.00714.79
7.3.60.0080.00714.79
7.3.50.0080.00614.85
7.3.40.0070.00714.73
7.3.30.0050.00914.81
7.3.20.0100.00614.88
7.3.10.0060.01014.90
7.3.00.0070.00914.83
7.2.330.0040.01516.60
7.2.320.0060.01016.69
7.2.310.0000.01716.52
7.2.300.0120.01216.68
7.2.290.0110.00516.80
7.2.260.0040.01114.65
7.2.250.0080.01214.89
7.2.240.0180.00315.30
7.2.230.0080.00915.12
7.2.220.0070.00815.18
7.2.210.0090.00715.05
7.2.200.0100.00715.02
7.2.190.0080.00815.09
7.2.180.0090.00615.07
7.2.170.0060.00815.04
7.2.160.0090.00614.99
7.2.150.0080.00915.11
7.2.140.0090.00915.12
7.2.130.0060.01115.04
7.2.120.0110.00715.04
7.2.110.0080.00815.01
7.2.100.0110.00815.14
7.2.90.0080.00915.19
7.2.80.0060.01015.12
7.2.70.0120.00615.20
7.2.60.0100.01015.46
7.2.50.0080.00915.18
7.2.40.0090.00815.08
7.2.30.0070.00915.23
7.2.20.0070.01015.15
7.2.10.0090.00815.11
7.2.00.0110.00715.69
7.1.330.0110.00413.50
7.1.320.0070.01013.89
7.1.310.0110.00713.90
7.1.300.0070.00713.89
7.1.290.0110.00513.99
7.1.280.0060.00813.97
7.1.270.0080.00813.86
7.1.260.0110.00513.87
7.1.250.0090.00613.99
7.1.240.0090.00913.90
7.1.230.0110.00713.87
7.1.220.0090.00913.79
7.1.210.0230.00813.88
7.1.200.0090.00614.03
7.1.190.0110.00513.69
7.1.180.0110.00613.87
7.1.170.0090.00813.73
7.1.160.0130.00513.84
7.1.150.0100.00813.76
7.1.140.0100.00613.78
7.1.130.0110.00613.88
7.1.120.0100.00714.01
7.1.110.0090.00713.88
7.1.100.0110.00613.86
7.1.90.0090.00913.76
7.1.80.0110.00613.96
7.1.70.0100.00714.41
7.1.60.0100.00814.73
7.1.50.0200.00713.80
7.1.40.0070.00813.74
7.1.30.0080.00913.75
7.1.20.0100.00713.80
7.1.10.0100.00813.76
7.1.00.0100.01515.03
7.0.330.0080.00913.34
7.0.320.0110.00813.46
7.0.310.0100.00813.34
7.0.300.0120.00513.49
7.0.290.0100.00813.39
7.0.280.0120.00613.40
7.0.270.0090.00813.51
7.0.260.0110.00513.46
7.0.250.0110.00813.58
7.0.240.0080.01013.44
7.0.230.0250.00813.54
7.0.220.0080.00813.48
7.0.210.0070.00913.40
7.0.200.0110.00613.62
7.0.190.0120.00513.52
7.0.180.0130.00413.49
7.0.170.0070.01113.41
7.0.160.0110.00513.40
7.0.150.0090.00813.50
7.0.140.0090.00713.50
7.0.130.0110.00613.49
7.0.120.0100.00713.48
7.0.110.0100.00813.50
7.0.100.0120.00613.44
7.0.90.0100.00613.52
7.0.80.0090.00713.40
7.0.70.0230.01314.37
7.0.60.0190.01414.48
7.0.50.0180.02214.49
7.0.40.0190.01314.45
7.0.30.0160.01714.52
7.0.20.0210.01514.55
7.0.10.0180.01514.49
7.0.00.0200.01614.54
5.6.400.0080.01014.14
5.6.390.0080.00814.17
5.6.380.0110.00814.13
5.6.370.0100.00814.28
5.6.360.0130.00514.19
5.6.350.0100.00814.09
5.6.340.0090.00814.24
5.6.330.0110.00714.17
5.6.320.0100.00914.14
5.6.310.0080.00914.41
5.6.300.0120.00614.26
5.6.290.0100.00614.15
5.6.280.0120.01415.39
5.6.270.0100.00714.15
5.6.260.0100.00614.36
5.6.250.0080.00814.20
5.6.240.0110.00614.23
5.6.230.0090.00814.21
5.6.220.0130.01815.17
5.6.210.0140.01715.18
5.6.200.0190.01815.36
5.6.190.0170.01415.24
5.6.180.0200.01615.29
5.6.170.0160.01515.33
5.6.160.0190.01515.25
5.6.150.0180.01415.26
5.6.140.0140.01715.27
5.6.130.0170.01715.24
5.6.120.0090.01715.23
5.6.110.0110.01715.29
5.6.100.0170.01915.23
5.6.90.0140.01815.17
5.6.80.0200.01315.04
5.6.70.0150.01815.06
5.6.60.0170.01815.12
5.6.50.0150.02015.12
5.6.40.0170.01615.11
5.6.30.0150.01615.09
5.6.20.0140.01715.09
5.6.10.0190.01515.00
5.6.00.0190.01915.15
5.5.380.0120.00514.31
5.5.370.0110.00714.13
5.5.360.0180.01515.15
5.5.350.0130.01915.21
5.5.340.0210.01315.15
5.5.330.0150.01715.35
5.5.320.0190.01515.15
5.5.310.0180.01415.24
5.5.300.0180.01615.27
5.5.290.0210.01315.17
5.5.280.0080.01915.10
5.5.270.0180.01515.19
5.5.260.0150.01815.26
5.5.250.0180.01515.07
5.5.240.0190.01515.13
5.5.230.0190.01415.05
5.5.220.0180.01415.05
5.5.210.0190.01515.05
5.5.200.0160.01615.05
5.5.190.0170.01515.03
5.5.180.0180.01515.17
5.5.170.0130.00814.20
5.5.160.0200.01314.98
5.5.150.0160.01514.98
5.5.140.0180.01315.07
5.5.130.0170.01515.11
5.5.120.0220.01415.03
5.5.110.0180.01415.11
5.5.100.0170.01514.98
5.5.90.0170.01415.08
5.5.80.0160.01515.01
5.5.70.0140.01715.10
5.5.60.0160.01515.05
5.5.50.0170.01515.00
5.5.40.0180.01315.08
5.5.30.0190.01314.91
5.5.20.0160.01615.17
5.5.10.0120.01915.04
5.5.00.0180.01714.96

preferences:
61.16 ms | 400 KiB | 5 Q