Removed commented out microbenchmark

Removed a section of commented out code that apparently was some kind of
microbenchmark. Also fixed indentation of the while loop in foreach.
Removed commented out microbenchmark
Removed commented out updated0 method

There is an existing, working updated0 so I don't see any reason to keep
this around.
Removed commented out secondary constructor

This has been replaced by makeHashTrieMap a long time ago, so I don't see
any reason to keep this around.