log: restore cache used by --copies The {filelog -> linkrev -> copyfrom} cache was refactored and broken by: changeset: 10060:f780b1098efc user: Patrick Mezard <pmezard@gmail.com> date: Sun Dec 13 18:06:24 2009 +0100 summary: templatekw: change {file_copies} behaviour, add {file_copies_switch} With --copies, this cache is accessed for every touched file of every revision. Unfortunately it is recreated for every revision, which means filelogs are parsed again. This patch makes the cache global again for all revisions. A couple of indicative timings of "hg log --copies", before and after: hg: 44s / 5s mozilla --limit 10000: 3m51s / 2m32s mozilla: 23m46s / 12m23s I do not know any good tool to trace memory consumption of these runs for comparisons. Watching the full mozilla run in top, the process did not seem to misbehave.