fix(expression_extractor): fixed package roots
perf(scope): Make the digest loop easier to optimize by splitting it into smaller
and simpler methods.
perf(scope): Compute perf counters as part of the fast dirty check if possible.
chore(scope): Add comment to explain why we don't always stop at the last dirty watch.
WIP: ChangeDetector API proposal
WIP: basic dirty checking implementation
WIP: checkpoint getter is a function
WIP: docs/ AST
WIP
WIP
WIP: LinkedList0
WIP
WIP: correct karma-snapshoot.sh
WIP: green
WIP
WIP cleanup
WIP
WIP
WIP
WIP