ce9d889436
Rather than scan the files in the old directory twice to detect the deletions we now scan both directories twice and then do all the diffing on the in-memory structure. This is more efficient, but it also lets us diff more complex things later that are not exact on-disk trees. Upstream-commit: 727e7fcccadf1d3e286f5a3c8d1aa388f6b4dab8 Component: engine