diff mercurial/metadata.py @ 44942:25512a65cefd

metadata: filter the `removed` set to only contains relevant data

The `files` entry can be bogus and contains too many entries. This can badly
combines with the computation of `removed` inflating the set size. The can lead
to the changesets centric rename computation to process much more data than
needed, slowing it down (and increasing space taken by data storage).

In practice newer commits already that reduced set, this applies this "fix" to
older changeset.

Differential Revision: https://phab.mercurial-scm.org/D8589

--- a/mercurial/metadata.py	Wed May 27 12:45:39 2020 +0200
+++ b/mercurial/metadata.py	Wed May 27 12:56:13 2020 +0200
@@ -94,6 +94,9 @@
     for f in ctx.files():
         if f not in ctx:
             removed.append(f)
+    if removed:
+        rf = get_removal_filter(ctx)
+        removed = [r for r in removed if not rf(r)]
     return removed