Alexis S. L. Carvalho <alexis@cecm.usp.br> [Sat, 28 Oct 2006 20:21:52 -0300] rev 3571
log speedup: walkchangerevs: filter the files only if we need them
This speeds up hg log and significantly reduces memory usage (max RSS
goes from ~92MB to ~21MB on the kernel repo), since we no longer store
all the revisions in the cache.