Online PHP editor | perf for QQD3g

@ 2014-06-26T08:37:59Z

<?php

class TimeUUID extends DateTime
{
    // Interval between Julian and Gregorian calendar in 100nanoseconds
    const Interval = "122192928000000000";
    const Time = 1;
    const DCE = 2;

    /**
     * Returns true if this UUID is parsable
     *
     * @param string $uuid
     * @return boolean
     */
    private static function isUUID($uuid)
    {
        if (preg_match('/([a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12})/', $uuid))
            return true;

        return false;
    }

    /**
     * Ensure the value is not a signed extracted value
     *
     * @param char $value
     * @return char
     */
    private static function ensureNotSigned8bits($value)
    {
        return (256 + $value) % 256;
    }

    /**
     * Create data according to the two given raw values
     *
     * @param integer $raw1
     * @param integer $raw2
     * @return char array[8]
     */
    private static function createData($raw1, $raw2)
    {
        $b1 = ($raw1 & 0xFF000000) >> 24;
        $b2 = ($raw1 & 0x00FF0000) >> 16;
        $b3 = ($raw1 & 0x0000FF00) >> 8;
        $b4 = ($raw1 & 0x000000FF);

        $b5 = ($raw2 & 0xFF000000) >> 24;
        $b6 = ($raw2 & 0x00FF0000) >> 16;
        $b7 = ($raw2 & 0x0000FF00) >> 8;
        $b8 = ($raw2 & 0x000000FF);

        return array(
            TimeUUID::ensureNotSigned8bits($b1), // 8bits
            $b2, // 8bits
            $b3, // 8bits
            $b4, // 8bits
            TimeUUID::ensureNotSigned8bits($b5), // 8bits
            $b6, // 8bits
            $b7, // 8bits
            $b8, // 8bits
        );
    }

    /**
     * Extract fields from the given UUID
     *
     * @param string $uuid
     * @return array
     */
    private static function extractFields($uuid)
    {
        // remove dashes
        $uuid = preg_replace("/[^a-f0-9]/is", "", $uuid);

        $data1 = hexdec(substr($uuid, 0, 8));
        $data2 = hexdec(substr($uuid, 8, 4));
        $data3 = hexdec(substr($uuid, 12, 4));

        $uuid332 = hexdec(substr($uuid, 16, 8));
        $uuid432 = hexdec(substr($uuid, 24, 8));

        return array(
            $data1, // 32 bits
            $data2, // 16 bits
            $data3, // 16 bits
            TimeUUID::createData($uuid332, $uuid432)
        );
    }

    /**
     * Build the UUID using the raw values
     *
     * @param integer $data1
     * @param integer $data2
     * @param integer $data3
     * @param char array[8] $data4
     * @return string
     */
    private static function composeFields($data1, $data2, $data3, $data4)
    {
        $data1Str = str_pad(dechex($data1), 8, '0', STR_PAD_LEFT);
        $data2Str = str_pad(dechex($data2), 4, '0', STR_PAD_LEFT);
        $data3Str = str_pad(dechex($data3), 4, '0', STR_PAD_LEFT);
        $data4Str0 = str_pad(dechex($data4[0]), 2, '0', STR_PAD_LEFT);
        $data4Str1 = str_pad(dechex($data4[1]), 2, '0', STR_PAD_LEFT);
        $result = "$data1Str-$data2Str-$data3Str-$data4Str0$data4Str1-";
        foreach (range(2, 7) as $index)
            $result .= str_pad(dechex($data4[$index]), 2, '0', STR_PAD_LEFT);

        return $result;
    }

    /**
     * Check if the variant of this UUID 4rd node is a DCE
     *
     * @param integer $data4
     * @return boolean
     */
    private static function checkVariantDCE($data4)
    {
        return ($data4[0] & 0xC0) == (TimeUUID::DCE << 6);
    }

    /**
     * Check if the version of this UUID 3rd node is a Time
     *
     * @param integer $data3
     * @return boolean
     */
    private static function checkVersionTime($data3)
    {
        return ($data3 >> 12) == (TimeUUID::Time);
    }

    /**
     * Parse the given uuid, check if it's a TimeUUID (RFC4144), and returns parsed data
     *
     * @param type $uuid
     * @return array(
     *     Unix Timestamp,
     *     Data,
     *     100nanoseconds
     * )
     */
    private static function parse($uuid)
    {
        list($data1, $data2, $data3, $data4) = TimeUUID::extractFields($uuid);
        if (!TimeUUID::checkVariantDCE($data4))
            throw new Exception("Not a valid TimeUUID: DCE not found (Variant)");

        if (!TimeUUID::checkVersionTime($data3))
            throw new Exception("Not a valid TimeUUID: Time not found (Version)");

        // $time = ($data1 | ($data2 << 32) | (($data3 & 0xFFF) << 48)) - TimeUUID::Interval;
        $time =
            bcsub(
                bcadd(
                    bcadd(
                        bcmul(
                            $data2,
                            "4294967296", // 0xFFFFFFFF
                            0
                        ),
                        $data1
                    ),
                    bcmul(
                        $data3 & 0xFFF,
                        "281474976710656", // 0xFFFFFFFFFFFF
                        0
                    )
                ),
                TimeUUID::Interval
            );

        return array(
            // intval($time / 10000000),
            intval(bcdiv($time, 10000000, 0)),
            $data4,
            // intval($time % 10000000),
            intval(bcmod($time, 10000000))
        );
    }

    private $data = array(
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0
    );

    private $ticks = 0;

    /**
     * Returns $this data
     *
     * @return char array[8]
     */
    public function getData()
    {
        return $this->data;
    }

    /**
     * Specify the data this TimeUUID will holds. Check TimeUUIDMax for an example
     *
     * @param char array[8] $data
     */
    public function setData($data)
    {
        $this->data = $data;
    }

    /**
     * Returns $this 100nanoseconds
     *
     * @return integer
     */
    public function getTicks()
    {
        return $this->ticks;
    }

    /**
     * Since DateTime doesn't support 100nanoseconds, you can give here the
     * missing accuracy of DateTime to build a complete TimeUUID
     *
     * @param integer $ticks
     */
    public function setTicks($ticks)
    {
        $this->ticks = $ticks;
    }

    /**
     * Attempt to construct a DateTime based on the given TimeUUID, fallback on
     * default DateTime constructor if the given $time is not a TimeUUID
     *
     * @param type $time
     * @param DateTimeZone $timezone (ignored when passing a TimeUUID in $time)
     */
    public function __construct($time, $timezone = null)
    {
        if (TimeUUID::isUUID($time)) {
            // TimeUUID are always UTC, and timezone parameter is ignored
            // when ctoring with @ syntax
            list($time, $this->data, $this->ticks) = TimeUUID::parse($time);
            parent::__construct('@' . $time);
        } else {
            parent::__construct($time, $timezone);
        }
    }

    /**
     * Return $this TimeUUID
     *
     * @return string
     */
    public function __toString()
    {
        // ((Timesteamp() * 10000000) + Interval) + Ticks
        $time =
            bcadd(
                bcadd(
                    bcmul(
                        $this->getTimestamp(),
                        10000000
                    ),
                    TimeUUID::Interval
                ),
                $this->getTicks()
            );

        // $time & 32 (0xFFFFFFFF => 2^32)
        $data1 = bcmod($time, "4294967296");

        // $time >> 32
        $timeHigh = bcdiv($time, "4294967296", 0);

        $data2 = $timeHigh & 0xFFFF;
        $data3 = (($timeHigh >> 16) & 0xFFF) | TimeUUID::Time << 12;

        $data = $this->data;
        $data[0] = ($data[0] & 0x3F) | TimeUUID::DCE << 6;

        return TimeUUID::composeFields($data1, $data2, $data3, $data);
    }
}

$timeUuid = new TimeUUID("ffffffff-ffff-1fff-8000-000000000000");
$timeUuid->format(DateTime::ISO8601);

$timeUuid = new TimeUUID("00000000-0000-1000-8fff-ffffffffffff");
$timeUuid->format(DateTime::ISO8601);

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)
8.3.6	0.007	0.011	17.00
8.3.5	0.005	0.010	22.07
8.3.4	0.009	0.009	19.16
8.3.3	0.004	0.011	19.35
8.3.2	0.003	0.006	20.34
8.3.1	0.003	0.006	23.48
8.3.0	0.000	0.008	19.27
8.2.18	0.010	0.007	18.66
8.2.17	0.009	0.009	22.96
8.2.16	0.010	0.010	20.70
8.2.15	0.006	0.003	24.18
8.2.14	0.003	0.005	24.66
8.2.13	0.004	0.004	26.16
8.2.12	0.009	0.009	20.97
8.2.11	0.004	0.007	22.44
8.2.10	0.000	0.013	18.28
8.2.9	0.005	0.003	19.17
8.2.8	0.004	0.004	18.25
8.2.7	0.006	0.006	18.25
8.2.6	0.000	0.009	18.05
8.2.5	0.000	0.008	18.07
8.2.4	0.005	0.003	18.34
8.2.3	0.004	0.004	18.42
8.2.2	0.005	0.003	18.21
8.2.1	0.000	0.008	18.30
8.2.0	0.000	0.008	18.25
8.1.28	0.008	0.008	25.92
8.1.27	0.004	0.004	24.00
8.1.26	0.004	0.004	26.35
8.1.25	0.004	0.004	28.09
8.1.24	0.007	0.003	23.97
8.1.23	0.003	0.009	19.09
8.1.22	0.006	0.003	17.93
8.1.21	0.000	0.008	18.77
8.1.20	0.004	0.008	17.73
8.1.19	0.000	0.009	17.85
8.1.18	0.008	0.000	18.10
8.1.17	0.008	0.000	18.96
8.1.16	0.004	0.004	22.21
8.1.15	0.004	0.004	19.15
8.1.14	0.005	0.003	17.93
8.1.13	0.004	0.004	17.96
8.1.12	0.000	0.007	17.81
8.1.11	0.002	0.005	17.79
8.1.10	0.000	0.008	17.87
8.1.9	0.003	0.005	18.00
8.1.8	0.000	0.008	17.83
8.1.7	0.007	0.000	17.85
8.1.6	0.006	0.003	17.83
8.1.5	0.004	0.004	17.80
8.1.4	0.007	0.004	17.90
8.1.3	0.003	0.008	17.94
8.1.2	0.003	0.007	17.95
8.1.1	0.003	0.006	17.86
8.1.0	0.005	0.003	18.03
8.0.30	0.000	0.009	18.77
8.0.29	0.005	0.003	17.14
8.0.28	0.004	0.004	18.51
8.0.27	0.000	0.008	17.36
8.0.26	0.003	0.003	17.32
8.0.25	0.000	0.007	17.26
8.0.24	0.003	0.003	17.43
8.0.23	0.004	0.004	17.36
8.0.22	0.000	0.007	17.35
8.0.21	0.007	0.000	17.36
8.0.20	0.004	0.004	17.39
8.0.19	0.008	0.000	17.36
8.0.18	0.005	0.003	17.36
8.0.17	0.009	0.000	17.39
8.0.16	0.000	0.008	17.23
8.0.15	0.008	0.004	17.32
8.0.14	0.007	0.003	17.26
8.0.13	0.003	0.004	13.70
8.0.12	0.005	0.003	17.34
8.0.11	0.003	0.005	17.34
8.0.10	0.000	0.011	17.40
8.0.9	0.004	0.004	17.16
8.0.8	0.006	0.009	17.30
8.0.7	0.003	0.006	17.29
8.0.6	0.000	0.008	17.36
8.0.5	0.003	0.006	17.40
8.0.3	0.013	0.009	17.57
8.0.2	0.013	0.006	17.54
8.0.1	0.008	0.000	17.47
8.0.0	0.007	0.012	17.29
7.4.33	0.000	0.005	15.22
7.4.32	0.006	0.000	16.87
7.4.30	0.000	0.007	16.82
7.4.29	0.004	0.004	16.95
7.4.28	0.000	0.008	17.04
7.4.27	0.004	0.004	17.05
7.4.26	0.005	0.002	16.95
7.4.25	0.003	0.005	17.02
7.4.24	0.002	0.005	17.01
7.4.23	0.003	0.003	17.13
7.4.22	0.012	0.006	16.96
7.4.21	0.008	0.007	16.89
7.4.20	0.004	0.004	17.03
7.4.19	0.000	0.008	17.01
7.4.16	0.012	0.012	16.97
7.4.15	0.013	0.006	17.40
7.4.14	0.008	0.012	17.86
7.4.13	0.003	0.015	16.97
7.4.12	0.009	0.014	17.01
7.4.11	0.009	0.009	16.98
7.4.10	0.000	0.021	16.95
7.4.9	0.007	0.011	16.89
7.4.8	0.006	0.018	19.39
7.4.7	0.010	0.014	16.93
7.4.6	0.014	0.007	16.88
7.4.5	0.006	0.003	16.89
7.4.4	0.007	0.016	16.91
7.4.3	0.000	0.017	17.04
7.4.0	0.010	0.009	15.25
7.3.33	0.003	0.003	13.54
7.3.32	0.003	0.003	13.66
7.3.31	0.008	0.000	16.77
7.3.30	0.003	0.003	16.71
7.3.29	0.004	0.011	16.76
7.3.28	0.007	0.012	16.73
7.3.27	0.017	0.000	17.40
7.3.26	0.009	0.010	16.94
7.3.25	0.012	0.006	17.00
7.3.24	0.003	0.013	16.71
7.3.23	0.009	0.009	16.86
7.3.21	0.011	0.007	17.06
7.3.20	0.007	0.011	19.39
7.3.19	0.009	0.009	16.86
7.3.18	0.010	0.013	17.16
7.3.17	0.012	0.006	16.89
7.3.16	0.003	0.013	16.94
7.3.12	0.007	0.010	15.26
7.3.11	0.010	0.010	15.61
7.3.10	0.007	0.011	15.33
7.3.9	0.011	0.004	15.10
7.3.8	0.007	0.010	15.12
7.3.7	0.004	0.007	15.41
7.3.6	0.017	0.000	15.08
7.3.5	0.006	0.012	15.23
7.3.4	0.008	0.008	15.34
7.3.3	0.007	0.007	15.26
7.3.2	0.003	0.010	17.15
7.3.1	0.010	0.007	17.05
7.3.0	0.006	0.009	16.86
7.2.33	0.013	0.007	17.23
7.2.32	0.007	0.011	17.15
7.2.31	0.010	0.010	17.20
7.2.30	0.010	0.008	17.16
7.2.29	0.012	0.006	17.23
7.2.25	0.011	0.007	15.80
7.2.24	0.013	0.007	15.49
7.2.23	0.003	0.016	15.67
7.2.22	0.007	0.004	15.51
7.2.21	0.004	0.011	15.66
7.2.20	0.003	0.010	15.59
7.2.19	0.007	0.007	15.40
7.2.18	0.010	0.007	15.62
7.2.17	0.003	0.014	15.66
7.2.6	0.004	0.011	17.07
7.2.0	0.000	0.012	20.00
7.1.33	0.012	0.003	16.17
7.1.32	0.004	0.004	15.81
7.1.31	0.006	0.006	15.93
7.1.30	0.004	0.014	16.07
7.1.29	0.006	0.003	16.12
7.1.28	0.003	0.010	16.09
7.1.27	0.007	0.007	16.13
7.1.26	0.010	0.007	15.90
7.1.20	0.003	0.010	16.39
7.1.10	0.003	0.009	18.50
7.1.7	0.003	0.006	17.39
7.1.6	0.014	0.010	19.46
7.1.5	0.010	0.013	17.13
7.1.0	0.000	0.080	22.35
7.0.20	0.000	0.009	16.87
7.0.14	0.000	0.073	21.95
7.0.10	0.010	0.080	20.04
7.0.9	0.017	0.040	20.03
7.0.8	0.017	0.077	20.02
7.0.7	0.013	0.073	20.02
7.0.6	0.010	0.033	20.20
7.0.5	0.000	0.053	20.41
7.0.4	0.017	0.033	20.11
7.0.3	0.003	0.080	20.04
7.0.2	0.010	0.037	20.17
7.0.1	0.007	0.070	20.17
7.0.0	0.000	0.057	20.17
5.6.28	0.010	0.067	20.84
5.6.25	0.017	0.070	20.68
5.6.24	0.010	0.057	20.75
5.6.23	0.000	0.087	20.54
5.6.22	0.003	0.040	20.80
5.6.21	0.007	0.080	20.52
5.6.20	0.013	0.067	21.14
5.6.19	0.000	0.047	21.02
5.6.18	0.010	0.073	21.10
5.6.17	0.007	0.077	21.10
5.6.16	0.007	0.073	20.99
5.6.15	0.010	0.060	20.98
5.6.14	0.010	0.067	21.19
5.6.13	0.010	0.083	21.10
5.6.12	0.007	0.040	21.08
5.6.11	0.003	0.083	21.12
5.6.10	0.010	0.047	21.13
5.6.9	0.013	0.033	21.04
5.6.8	0.010	0.063	20.37
5.6.7	0.007	0.037	20.48
5.6.6	0.000	0.040	20.41
5.6.5	0.013	0.073	20.52
5.6.4	0.010	0.033	20.39
5.6.3	0.010	0.047	20.47
5.6.2	0.000	0.077	20.58
5.6.1	0.003	0.060	20.48
5.6.0	0.007	0.067	20.35
5.5.38	0.010	0.077	20.41
5.5.37	0.010	0.033	20.46
5.5.36	0.003	0.073	20.44
5.5.35	0.013	0.073	20.42
5.5.34	0.010	0.077	20.87
5.5.33	0.007	0.040	20.92
5.5.32	0.013	0.070	20.98
5.5.31	0.010	0.083	20.79
5.5.30	0.013	0.033	20.80
5.5.29	0.007	0.053	20.99
5.5.28	0.010	0.073	20.92
5.5.27	0.003	0.040	20.88
5.5.26	0.007	0.040	20.98
5.5.25	0.013	0.043	20.78
5.5.24	0.003	0.047	20.33
5.5.23	0.010	0.077	20.08
5.5.22	0.010	0.067	20.06
5.5.21	0.010	0.067	20.33
5.5.20	0.003	0.070	20.18
5.5.19	0.010	0.063	20.28
5.5.18	0.003	0.047	20.14
5.5.16	0.007	0.067	20.25
5.5.15	0.010	0.073	20.14
5.5.14	0.003	0.073	20.23
5.5.13	0.017	0.070	20.31
5.5.12	0.007	0.037	20.23
5.5.11	0.010	0.033	20.26
5.5.10	0.007	0.040	20.14
5.5.9	0.010	0.070	20.17
5.5.8	0.010	0.037	20.06
5.5.7	0.013	0.077	20.16
5.5.6	0.010	0.060	20.09
5.5.5	0.007	0.060	20.10
5.5.4	0.003	0.083	20.11
5.5.3	0.003	0.070	20.14
5.5.2	0.007	0.080	20.09
5.5.1	0.003	0.077	20.12
5.5.0	0.007	0.073	20.13
5.4.45	0.007	0.067	19.54
5.4.44	0.013	0.060	19.38
5.4.43	0.003	0.063	19.44
5.4.42	0.007	0.063	19.40
5.4.41	0.003	0.063	19.08
5.4.40	0.010	0.077	19.05
5.4.39	0.003	0.077	19.05
5.4.38	0.020	0.060	19.03
5.4.37	0.010	0.067	19.23
5.4.36	0.013	0.073	18.95
5.4.35	0.010	0.077	19.23
5.4.34	0.003	0.080	19.13
5.4.32	0.000	0.053	18.85
5.4.31	0.007	0.050	18.88
5.4.30	0.007	0.080	19.20
5.4.29	0.000	0.073	19.16
5.4.28	0.007	0.040	19.16
5.4.27	0.007	0.070	18.85
5.4.26	0.007	0.033	19.14
5.4.25	0.010	0.070	19.15
5.4.24	0.003	0.037	18.84
5.4.23	0.007	0.043	18.87
5.4.22	0.010	0.053	19.14
5.4.21	0.007	0.060	18.84
5.4.20	0.013	0.073	19.04
5.4.19	0.013	0.057	19.21
5.4.18	0.000	0.040	19.20
5.4.17	0.010	0.067	18.93
5.4.16	0.003	0.077	19.11
5.4.15	0.007	0.033	18.86
5.4.14	0.007	0.040	16.51
5.4.13	0.010	0.027	16.56
5.4.12	0.003	0.040	16.51
5.4.11	0.010	0.067	16.32
5.4.10	0.003	0.037	16.39
5.4.9	0.013	0.050	16.61
5.4.8	0.003	0.053	16.54
5.4.7	0.010	0.030	16.46
5.4.6	0.000	0.073	16.55
5.4.5	0.007	0.030	16.50
5.4.4	0.007	0.057	16.38
5.4.3	0.003	0.050	16.51
5.4.2	0.000	0.040	16.41
5.4.1	0.003	0.060	16.37
5.4.0	0.000	0.073	15.93
5.3.29	0.003	0.083	14.87
5.3.28	0.010	0.067	14.77
5.3.27	0.013	0.063	14.61
5.3.26	0.007	0.080	14.73
5.3.25	0.003	0.047	14.65
5.3.24	0.007	0.070	14.73
5.3.23	0.003	0.057	14.72
5.3.22	0.003	0.037	14.66
5.3.21	0.007	0.033	14.77
5.3.20	0.010	0.047	14.61
5.3.19	0.000	0.080	14.69
5.3.18	0.007	0.070	14.73
5.3.17	0.010	0.073	14.65
5.3.16	0.000	0.063	14.69
5.3.15	0.007	0.077	14.75
5.3.14	0.000	0.063	14.57
5.3.13	0.003	0.070	14.61
5.3.12	0.000	0.040	14.66
5.3.11	0.007	0.073	14.65
5.3.10	0.010	0.033	14.22
5.3.9	0.013	0.057	14.03
5.3.8	0.003	0.033	14.19
5.3.7	0.000	0.070	14.20
5.3.6	0.003	0.053	13.99
5.3.5	0.010	0.073	14.07
5.3.4	0.003	0.080	14.15
5.3.3	0.007	0.063	14.08
5.3.2	0.000	0.077	13.74
5.3.1	0.007	0.063	13.69
5.3.0	0.007	0.073	13.78

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