apply unpack-trees and cache tree optimizations for testing and perf runs#19

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benpeart wants to merge 5 commits intomicrosoft:gvfs-2.17.1.2from benpeart:msft-cache-tree

+244-22

Commits on Aug 14, 2018

trace.h: support nested performance tracing

pclouds
authored and
benpeart
committed
unpack-trees: add performance tracing

pclouds
authored and
benpeart
committed
unpack-trees: optimize walking same trees with cache-tree

pclouds
authored and
benpeart
committed
unpack-trees: reduce malloc in cache-tree walk

pclouds
authored and
benpeart
committed
unpack-trees: reuse (still valid) cache-tree from src_index

pclouds
authored and
benpeart
committed