Online PHP editor | perf for PnF1O

@ 2014-11-09T14:48:26Z

<?php function removeDotPathSegments($path) {    if (strpos($path, '.') === false) {        return $path;    }     $inputBuffer = $path;    $outputStack = [];     /**     * 2.  While the input buffer is not empty, loop as follows:     */    while ($inputBuffer != '') {        /**         * A.  If the input buffer begins with a prefix of "../" or "./",         *     then remove that prefix from the input buffer; otherwise,         */        if (strpos($inputBuffer, "./") === 0) {            $inputBuffer = substr($inputBuffer, 2);            continue;        }        if (strpos($inputBuffer, "../") === 0) {            $inputBuffer = substr($inputBuffer, 3);            continue;        }         /**         * B.  if the input buffer begins with a prefix of "/./" or "/.",         *     where "." is a complete path segment, then replace that         *     prefix with "/" in the input buffer; otherwise,         */        if ($inputBuffer === "/.") {            $outputStack[] = '/';            break;        }        if (substr($inputBuffer, 0, 3) === "/./") {            $inputBuffer = substr($inputBuffer, 2);            continue;        }         /**         * C.  if the input buffer begins with a prefix of "/../" or "/..",         *     where ".." is a complete path segment, then replace that         *     prefix with "/" in the input buffer and remove the last         *     segment and its preceding "/" (if any) from the output         *     buffer; otherwise,         */        if ($inputBuffer === "/..") {            array_pop($outputStack);            $outputStack[] = '/';            break;        }        if (substr($inputBuffer, 0, 4) === "/../") {            array_pop($outputStack);            $inputBuffer = substr($inputBuffer, 3);            continue;        }         /**         * D.  if the input buffer consists only of "." or "..", then remove         *     that from the input buffer; otherwise,         */        if ($inputBuffer === '.' || $inputBuffer === '..') {            break;        }         /**         * E.  move the first path segment in the input buffer to the end of         *     the output buffer, including the initial "/" character (if         *     any) and any subsequent characters up to, but not including,         *     the next "/" character or the end of the input buffer.         */        if (($slashPos = stripos($inputBuffer, '/', 1)) === false) {            $outputStack[] = $inputBuffer;            break;        } else {            $outputStack[] = substr($inputBuffer, 0, $slashPos);            $inputBuffer = substr($inputBuffer, $slashPos);        }    }     return implode($outputStack);}  // --- Test --- $expectations = [    ['bar', '....//bar'],    ['bar', './bar'],    ['bar', '.././bar'],    ['bar', '.././bar'],    ['/foo/bar', '/foo/./bar'],    ['/bar/', '/bar/./'],    ['/', '/.'],    ['/bar/', '/bar/.'],    ['/bar', '/foo/../bar'],    ['/', '/bar/../'],    ['/', '/..'],    ['/', '/bar/..'],    ['/foo/', '/foo/bar/..'],    ['', '.'],    ['', '..'],];  foreach ($expectations as $struct) {    list($expected, $input) = $struct;    $result = removeDotPathSegments($input);    echo ($expected === $result) ? "Success\n" : "Failure: {$expected} !== {$result}\n";}

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).

Version	System time (s)	User time (s)	Memory (MiB)
5.4.34	0.007	0.036	12.03
5.4.32	0.005	0.039	12.52
5.4.31	0.011	0.038	12.52
5.4.30	0.006	0.043	12.52
5.4.29	0.007	0.045	12.51
5.4.28	0.009	0.042	12.41
5.4.27	0.002	0.041	12.41
5.4.26	0.005	0.040	12.41
5.4.25	0.005	0.046	12.41
5.4.24	0.010	0.047	12.41
5.4.23	0.005	0.041	12.40
5.4.22	0.004	0.040	12.40
5.4.21	0.008	0.037	12.40
5.4.20	0.007	0.050	12.40
5.4.19	0.014	0.056	12.39
5.4.18	0.009	0.036	12.39
5.4.17	0.012	0.035	12.40
5.4.16	0.010	0.061	12.40
5.4.15	0.011	0.044	12.40
5.4.14	0.006	0.044	12.09
5.4.13	0.010	0.062	12.07
5.4.12	0.007	0.043	12.03
5.4.11	0.005	0.039	12.04
5.4.10	0.006	0.035	12.03
5.4.9	0.009	0.035	12.03
5.4.8	0.002	0.045	12.03
5.4.7	0.007	0.035	12.03
5.4.6	0.004	0.037	12.03
5.4.5	0.007	0.035	12.03
5.4.4	0.005	0.039	12.02
5.4.3	0.005	0.039	12.01
5.4.2	0.007	0.038	12.00
5.4.1	0.004	0.040	12.01
5.4.0	0.010	0.036	11.51
5.3.29	0.007	0.040	12.80
5.3.28	0.011	0.052	12.71
5.3.27	0.011	0.054	12.73
5.3.26	0.011	0.053	12.72
5.3.25	0.010	0.046	12.72
5.3.24	0.005	0.055	12.72
5.3.23	0.007	0.041	12.71
5.3.22	0.007	0.037	12.68
5.3.21	0.003	0.043	12.68
5.3.20	0.009	0.036	12.68
5.3.19	0.005	0.040	12.68
5.3.18	0.007	0.039	12.67
5.3.17	0.009	0.038	12.67
5.3.16	0.009	0.035	12.68
5.3.15	0.004	0.045	12.67
5.3.14	0.005	0.040	12.66
5.3.13	0.007	0.041	12.66
5.3.12	0.008	0.039	12.65
5.3.11	0.011	0.042	12.66
5.3.10	0.005	0.040	12.13
5.3.9	0.008	0.036	12.12
5.3.8	0.007	0.041	12.09
5.3.7	0.004	0.043	12.10
5.3.6	0.007	0.038	12.09
5.3.5	0.005	0.038	12.02
5.3.4	0.009	0.035	12.02
5.3.3	0.007	0.038	11.98
5.3.2	0.009	0.044	11.76
5.3.1	0.006	0.047	11.74
5.3.0	0.010	0.051	11.72
5.2.17	0.007	0.029	9.22
5.2.16	0.003	0.039	9.22
5.2.15	0.005	0.032	9.22
5.2.14	0.004	0.033	9.21
5.2.13	0.005	0.031	9.18
5.2.12	0.006	0.029	9.18
5.2.11	0.007	0.030	9.18
5.2.10	0.008	0.031	9.18
5.2.9	0.004	0.033	9.18
5.2.8	0.007	0.032	9.18
5.2.7	0.008	0.029	9.18
5.2.6	0.003	0.034	9.13
5.2.5	0.012	0.049	9.10
5.2.4	0.002	0.035	9.07
5.2.3	0.009	0.027	9.05
5.2.2	0.005	0.028	9.05
5.2.1	0.007	0.028	8.95
5.2.0	0.005	0.031	8.80
5.1.6	0.002	0.028	8.09
5.1.5	0.002	0.027	8.09
5.1.4	0.004	0.025	8.07
5.1.3	0.005	0.026	8.42
5.1.2	0.004	0.027	8.44
5.1.1	0.005	0.027	8.16
5.1.0	0.004	0.026	8.17
5.0.5	0.003	0.021	6.64
5.0.4	0.005	0.019	6.51
5.0.3	0.003	0.031	6.32
5.0.2	0.006	0.017	6.29
5.0.1	0.004	0.020	6.27
5.0.0	0.006	0.030	6.25
4.4.9	0.009	0.036	4.78
4.4.8	0.004	0.015	4.75
4.4.7	0.002	0.016	4.75
4.4.6	0.002	0.016	4.75
4.4.5	0.001	0.017	4.77
4.4.4	0.004	0.024	4.71
4.4.3	0.008	0.012	4.76
4.4.2	0.002	0.016	4.85
4.4.1	0.003	0.015	4.85
4.4.0	0.003	0.024	4.76
4.3.11	0.002	0.016	4.67
4.3.10	0.001	0.016	4.66
4.3.9	0.001	0.017	4.64
4.3.8	0.002	0.024	4.59
4.3.7	0.002	0.015	4.63
4.3.6	0.002	0.015	4.63
4.3.5	0.000	0.020	4.63
4.3.4	0.002	0.025	4.54
4.3.3	0.002	0.018	3.30
4.3.2	0.003	0.016	3.28
4.3.1	0.002	0.021	3.25
4.3.0	0.013	0.020	7.46

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