Additional cache_result() calls

Add result caching to:
  - commit_tree_formatter
  - tree_formatter
  - calculate_improvement
  - get_adhoc_improvement

Change-Id: I503941d4eb5de13d61d046995df8a2df85cb6a90
2 files changed
tree: ca9b72fb88c26186ee8b229ecc750d3a4d30d938
  1. app/
  2. sample_data/
  3. tools/
  4. .gitignore