Ridiculously large JSons.

[thegreystone]

So, JSon is a ridiculously inefficient format for stack traces - they can easily become very large. We may want to warn the user when they become too large, maybe a configurable limit. We should also try to use a more compact format, for example not using "name", "value" and "children", but rather "n", "v" and "c". The examples seem to indicate that it should be possible:
https://github.com/spiermar/d3-flame-graph