Online PHP editor | perf for 5iCJK

@ 2014-02-20T15:36:34Z

<?php
function convertFloat($float)
{
    $float = (string)$float;
    $expPos = strpos($float, 'e');

    if ($expPos === false) {
    	return $float;
    }

    $beforeDot = '0'; // Well, fuck you my English.
    $afterDot = ''; // ^^
    $numberWithoutPrecision = substr($float, 0, $expPos);
    $exp = (int)substr($float, $expPos + 1, strlen($float));

    if ($exp === 0) {
        return '1';
    }

    $dotPos = strpos($numberWithoutPrecision, '.');

    if ($dotPos === false) {
        $beforeDot = $numberWithoutPrecision;
    } else {
        $beforeDot = substr($numberWithoutPrecision, 0, $dotPos);
        $afterDot = substr($numberWithoutPrecision, $dotPos + 1, strlen($numberWithoutPrecision));
        $afterDot = rtrim($afterDot, '0');
    }

    $beforeDot = ltrim($beforeDot, '0');

    if ($exp < 0) {
        $exp = -$exp;
        $len = strlen($beforeDot);

        if ($len <= $exp) {
            return '0.'.str_repeat('0', $exp - $len).$beforeDot.$afterDot;
        } else {
            return substr($beforeDot, 0, $len - $exp).'.'.substr($beforeDot, $len - $exp, $len).$afterDot;
        }
    } else {
        $len = strlen($afterDot);

        if ($len <= $exp) {
       		return $beforeDot.$afterDot.str_repeat('0', $exp - $len).'i';
        } else {
            return $beforeDot.substr($afterDot, 0, $exp).'.'.substr($afterDot, $exp, $len);
        }
    }
}

..var_dump(convertFloat('11111111111111111111111111111111111111111111111111111111111112e-60'));
var_dump(convertFloat('10'));

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)
5.5.9	0.010	0.087	19.43
5.5.8	0.020	0.073	19.37
5.5.7	0.010	0.083	19.54
5.5.6	0.030	0.057	19.54
5.5.5	0.017	0.077	19.45
5.5.4	0.030	0.063	19.46
5.5.3	0.023	0.073	19.27
5.5.2	0.017	0.073	19.38
5.5.1	0.013	0.060	19.61
5.5.0	0.020	0.080	19.41
5.4.25	0.013	0.080	19.15
5.4.24	0.010	0.063	18.92
5.4.23	0.020	0.080	19.14
5.4.22	0.020	0.060	18.87
5.4.21	0.013	0.063	19.07
5.4.20	0.013	0.080	19.24
5.4.19	0.027	0.067	19.23
5.4.18	0.013	0.077	19.07
5.4.17	0.030	0.063	18.96
5.4.16	0.023	0.047	19.05
5.4.15	0.020	0.067	19.06
5.4.14	0.017	0.067	16.50
5.4.13	0.017	0.077	16.44
5.4.12	0.023	0.060	16.31
5.4.11	0.027	0.067	16.46
5.4.10	0.023	0.043	16.68
5.4.9	0.023	0.037	16.39
5.4.8	0.017	0.040	16.48
5.4.7	0.030	0.057	16.28
5.4.6	0.023	0.033	16.30
5.4.5	0.023	0.070	16.36
5.4.4	0.020	0.057	16.42
5.4.3	0.023	0.060	16.38
5.4.2	0.027	0.030	16.38
5.4.1	0.027	0.033	16.45
5.4.0	0.023	0.043	15.95
5.3.28	0.020	0.063	14.62
5.3.27	0.020	0.063	14.62
5.3.26	0.020	0.073	14.63
5.3.25	0.020	0.077	14.67
5.3.24	0.023	0.047	14.66
5.3.23	0.027	0.067	14.61
5.3.22	0.030	0.063	14.73
5.3.21	0.027	0.073	14.64
5.3.20	0.020	0.043	14.63
5.3.19	0.020	0.047	14.58
5.3.18	0.027	0.053	14.65
5.3.17	0.040	0.040	14.63
5.3.16	0.020	0.047	14.59
5.3.15	0.023	0.033	14.63
5.3.14	0.027	0.067	14.72
5.3.13	0.030	0.050	14.46
5.3.12	0.027	0.070	14.60
5.3.11	0.047	0.043	14.57
5.3.10	0.030	0.047	14.05
5.3.9	0.033	0.050	14.05
5.3.8	0.023	0.060	14.04
5.3.7	0.023	0.037	14.10
5.3.6	0.013	0.053	14.06
5.3.5	0.033	0.033	14.01
5.3.4	0.033	0.060	14.02
5.3.3	0.023	0.070	13.92
5.3.2	0.020	0.053	13.75
5.3.1	0.063	0.047	13.62
5.3.0	0.010	0.043	13.56

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