commit 66c10814eaf9b007e335f3fccb5e2621d5f8b292
author Todd Wang <toddw@google.com> Thu Oct 22 22:24:57 2015 -0700
committer Todd Wang <toddw@google.com> Thu Oct 22 22:24:57 2015 -0700
tree b6ad3537b5912f5c74a69fe899cfdbaee26fa4ae
parent c29a7a7580c525332460df5043fcb1f4a524cad2

lib: Update v.io/x/lib/timing to a single implementation

The initial implementation of the timing package had two
implementations: a FullTimer with full timing info, and a
CompactTimer that is smaller and faster, but doesn't have full
timing info.  This is annoying for the user since they have to
make a choice, and adds complexity, and it bugged me.

This change consolidates things down to a single implementation,
and gets rid of the interfaces.  This is simpler to use for the
user.  The main point of CompactTimer was to avoid multiple small
allocations in the interval tree; the new Timer does the same
thing, while retaining full timing info.

As a bonus, the printing logic is faster, since we simply loop
through the intervals in the slice.  The printing logic for
CompactTimer was quite inefficient since it caused new
allocations for each list of children in compactInterval.

MultiPart: 2/2

Change-Id: I2fea725ccb9cd3ec0107d2d33bf1d8c32b07b452