Switch Dr. Heapstat's output files to a binary format

_From [brandenj...@gmail.com](https://code.google.com/u/102642871390330622592/) on September 14, 2013 17:51:10_

What is the problem to solve? Why is it important? Provide some context for those unfamiliar with the details of the system. Currently Dr. Heapstat outputs the log data in a text format. This creates significant performance issues when loading large data sets into the visualizer. These issues include long read times, large memory footprints, expensive post-processing of the string data. What are the possible approaches to solving the problem? Switching to a binary file format will decrease the initial read time of the log files; as well as eliminating expensive post-processing to separate the frame data. This will also make it easier to reduce the memory footprint.

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=1332_