CSTR: 'HeapTool has buttons and displays that help you analyze your system heap usage. The "Free Bytes" display indicates the number of free bytes available in your system heap, regardless of fragmentation and unused resources. You may click on the "Compact" button to remove fragmentation.The "Purge" button will remove all unused resources, leading to a more accurate display of heap usage. You may find it useful to press the "Purge" button prior to checking the available system heap space either here or in the "About the Finder" utility.Note that the system normally both compacts and purges the heap when necessary, so these buttons are only useful for analysis.'
