reduce memory by storing the thread ids next to the zones intead of
making zone lists per thread.
speed-up by reading the zones in linear order rather than bisecting
the whole list for each sample.
Add to the statistics view an option for "Non-reentrant
time", which displays the count of and time spent in zone
events which were the only appearances (at that time) of
their zones on their threads' stacks.
Besides the GUI changes, this involves:
- Introducing a tri-state accumulation mode to replace the
boolean "self time": now there's "Self time only",
"Child time", and "Non-reentrant time".
- Removing the separate "selfTotal" from SrcLocZonesSlim,
making "total" represent whichever of the now three options
is active, which in turn requires keeping track of the
accumulation mode in StatisticsCache and invalidating that
cache when the accumulation mode changes.
These two methods can search a timeline to determine whether
a given ZoneEvent is the only appearance of the given zone
on the current thread stack, or a re-entry.
Sets m_compare to the matched index. It supports multiple flags. It can
be run by comparing function name, source file, line number, and any
combination thereof. When searching for a match, we do 3 runs, quitting
out if any of them succeed.
1. Look for zone with same function same, source file, line number.
2. Look for zone with same function same, source file.
3. Look for zone with same function same.
If during the first 5 seconds of the trace there are no frames being reported,
the profiler will switch to following last 5 seconds of the trace, instead of
displaying three last frames.
