py3: fix up test-remotefilelog-cacheprocess.t to not depend on a repr It looks like the repr() of Exceptions is different from Python 2 to Python 3.7 (but not 3.5?), but the str() is still stable. Sigh. Differential Revision: https://phab.mercurial-scm.org/D5761

remotefilelog: cast division result to an int Otherwise mid is a float and this confuses __slice__ on Python 3. Differential Revision: https://phab.mercurial-scm.org/D5760

tests: cast division result to int Otherwise it is a float on Python 3 and code later compares about casting a float to an int. Differential Revision: https://phab.mercurial-scm.org/D5759

tests: various Python 3 ports for test-remotefilelog-datapack.py Use bytes I/O. Use byteschr(). Convert temporary path to bytes. Differential Revision: https://phab.mercurial-scm.org/D5758

tests: use items() in test-remotefilelog-datapack.py Performance doesn't matter in tests. iteritems() doesn't exist in Python 3. Differential Revision: https://phab.mercurial-scm.org/D5757

tests: use bytes and %d formatting in test-remotefilelog-datapack.py There were numerous failures on Python 3 due to str/bytes mismatch and '%s' not working for ints. Differential Revision: https://phab.mercurial-scm.org/D5756

perf: add a --[no-]clear-caches option to `perfnodemap` The option is useful to look at pure lookup performance on a warm data structure.

perf: add a perfnodemap command The command focus on timing of the nodemap object itself.