tree b439c1c1790a628a1df7be9f1ca1d546072ecc9b
parent d5f1f982e6d33f4ad980a3277457717acc130ad5
author Lalit Maganti <lalitm@google.com> 1712569026 +0100
committer Lalit Maganti <lalitm@google.com> 1712569026 +0100

tp: implement tree partitioning by group algorithm

This CL implements an algorithm to partition tree into a forest based
on a grouping key and preserving the structure of the original tree.

This algorithm will be used to prevent double-counting for heap graphs
and also might be generally useful in the future for critical path
work.

Change-Id: I0f0e89227d7da53f2b7bb89c4dfc9ba070ff872b