Script timer measures the time each part of the script takes to execute and displays the result in a HTML table, for optimization analysis.

Key Features of Script timer:
- Add time markers recorded before class instantiation
- Temporarily pause the timer
- Group markers by script
- Optionally add subtotals per script (group)
- Uses PHP bcmath functions if possible for better accuracy
- Adjustable precision for the calculations
- Adjustable precision for the output
- Provides the following measurements: run time for the marker (excluding processing by this class), run time for the marker as a percentage of the total run time, cumulative run time up to the marker, cumulative percentage
- Customizable presentation of the results returning: a bi-dimensional array for custom external result processing, an HTML string for use with a template system, HTML for presentation to the user without further processing
- The details of presentation of the results can be customized with CSS

Requirements:
PHP 3.0 or higher