One thing not mentioned yet is that the amount of "uniqueness" contained in $$ drops significantly when you scale beyond a single webserver. If you have a group of load balanced webservers, you no longer have to roll-the-pid to get duplicate values of $$.

Even if your whole project is running on a single machine today, a simple timestamp+pid identifier hampers the long term scalability of your site.

-Blake

In reply to Re: method of ID'ing by blakem
in thread method of ID'ing by Parham

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