The command `ExamineStorage' insists on exactly one argument, an integer we'll call N. This command enumerates the whole heap, summing up, for each typecode, the size and number of objects with that typecode. Note that our allocator doesn't distinguish between objects that have typecodes and those that don't, so sometimes random data will be interpreted as typecodes; I think that rarely leads to large errors in the resulting statistics. After the heap scan, the information is sorted by typecode, and the grand totals and the information for the N most memory-consuming typecodes is printed. The margin controls the prettyprinting of the results.

It seems to scan the heap pretty quickly. In my testing, it's taken only a few seconds. For example, 3.5 for a 15 megabyte, 15 kilo-object heap, on my SPARCstation 2. The first invocation seems to take longer than the rest.