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I'm not experiencing any performance issues, however I'd like to take a look at what takes how long and how much memory cpu it uses etc.

I'd like to get a firsthand understanding of which things can be bottle necks etc and improve any code i might reuse or build upon... (perfectionist)

I'm looking to create a little function that i can call at the begining and end of each function that records:

  • execution time
  • memory used
  • cpu demand

any ideas?

i haven't used things like memory_get_usage(), or methods of recording time() before so would love to get some tips on their combined implementation

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There are already a host of solutions made just for that, you might want to have a look at some of these:

XDEBUG EXTENSION FOR PHP

Xdebug's Profiler is a powerful tool that gives you the ability to analyze your PHP code and determine bottlenecks or generally see which parts of your code are slow and could use a speed boost.

Other Resource:

PHP Quick Profiler

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I haven't tested it a lot, but friend of mine recomended http://xdebug.org/ for profiling PHP

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this looks far more powerful/coples than what i need, i was looking for a simple homemade function using some of php's built in functions like memory_get_usage() - will update question
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Try using XDebug to debug your code flow. XDebug will generate some file that tell how well your codes, you can use Kcachegrind to visualize that files.

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