note 10075 added to microtime

if you want to measure runtime of some code, and the result is really relevant, then keep in mind the followings: 1. you should only measure the time the code runs. This means if you use functions to make a double from microtime, then get begin time, run the code, get end time, and only _after_ this do conversion and computing. This is relevant for short cycles. 2. if runtime is very small, you can put the code in a loop and run it for 100 or 1000 times. The more you run it the more accurate the value will be. Do not forget to divide the runtime by the times you ran it. 3. if you are measuring a loop, then you do not actually measure the runtime of one cycle. Some caching may occur which means you will not get one cycle's runtime. For a short code, this can eventually result in big differences. Use looping only if the code is long and comlicated. 4. your runtime will be highly affected by the load of the server, which may be effected by many things - so, always run your runtime measuering multiple times, and, when comparing two methods, for e.g., then measure their runtimes one after the other, so I mean do not use values from yesterday, the circumstances may strongly affect your measuring. Trapeer http://www.php.net/manual/function.microtime.php