Usage

kreXX will be called in the PHP source code:
\krexx($myObject);
Most of the time you will use this method. kreXX will analyse the $object and give you detailed information about it: In case the variable is not an object, it will simply display its content.
Start a benchmark:
\kreXX::timerStart();

Define a "moment" during a benchmark test. The $string should be something meaningful, like "Model invoice db call":
\kreXX::timerMoment($string);

End the benchmark test and displays the result:
\kreXX::timerEnd();

Outputs backtrace with sourcecode. When kreXX finds objects inside the backtrace, it will analyse them:
\kreXX::backtrace();

Register the fatal error handler in the system:
\krexx::registerFatal();

Unregister the fatal error handler in the system:
\krexx::unregisterFatal();

Mode datailed help

Documentation at Typo3 Docs
Documentation at sourceforge