Introduction

Apex Log Analyzer makes performance analysis of Salesforce debug logs much easier and quicker. Visualize code execution via a Flame chart and Call Tree, identify and resolve performance and SOQL/DML problems via Method and Database Analysis.

WARNING

In general set the APEX_CODE debug flag to be FINE or higher, with a lower level the log will likely not contain enough detail for meaningful analysis.

The quality of data shown depends entirely on the data contained in the log files.
Special care should be taken when looking at log files that have been truncated as you are only seeing a part of the execution and that may lead you to misunderstand what is really happening.

A log level of FINE seems to give a good balance between log detail and execution time.
Higher log levels result in higher reported execution time than would be seen with logging off.
This is due to the over head associated with logging method entry and exit.