perfomance testing for generation unique id from string smaller than 1000 chars

gistfile1.php

I've take an simple test for get sure what is the best basic case for this
Firstly my timing result:

```shell
% (php /tmp/testmd5.php); (php /tmp/testsha1.php); (php /tmp/teststr_replace.php); (php /tmp/teststrtr.php);

11.715120792389( php /tmp/testmd5.php; )  11,73s user 0,01s system 99% cpu 11,750 total
13.626849889755( php /tmp/testsha1.php; )  13,65s user 0,00s system 99% cpu 13,653 total
16.591732978821( php /tmp/teststr_replace.php; )  16,60s user 0,02s system 99% cpu 16,627 total
87.248502969742( php /tmp/teststrtr.php; )  87,24s user 0,01s system 99% cpu 1:27,28 total
```


**/tmp/testmd5.php**

```php
$p = '/home/al/p/dimabay/module/DimabayMail/view/dimabay-mail/images/dimabay-card.jpeg';
$t = microtime(1);
for ($i=0;$i<10000000;$i++) {
    $s = md5($p);
}
$d = microtime(1) - $t;
echo $d;
```

**/tmp/testsha1.php**

```php
$p = '/home/al/p/dimabay/module/DimabayMail/view/dimabay-mail/images/dimabay-card.jpeg';
$t = microtime(1);
for ($i=0;$i<10000000;$i++) {
     $s = sha1($p);
}
$d = microtime(1) - $t;
echo $d;
```

**/tmp/teststr_replace.php**

```php
$p = '/home/al/p/dimabay/module/DimabayMail/view/dimabay-mail/images/dimabay-card.jpeg';
$t = microtime(1);
for ($i=0;$i<10000000;$i++) {
    $s = str_replace(['/','-'],'',$p);
}
$d = microtime(1) - $t;
echo $d;
```

**/tmp/teststrtr.php**

```php
$p = '/home/al/p/dimabay/module/DimabayMail/view/dimabay-mail/images/dimabay-card.jpeg';
$t = microtime(1);
for ($i=0;$i<10000000;$i++) {
    $s = strtr($p,['/','-']);
}
$d = microtime(1) - $t;
echo $d;
```
hm...