largefiles: drop the unfiltered repo usage in overridepurge() Now that repoview supports replacing methods, we don't need this hack.

repoview: allow methods on the proxy class to be replaced It doesn't seem to be a common idiom for repo instances, but the status() method is replaced in largefiles' purge() override. Since __setattr__ is implemented in repoview to setattr() on the unfiltered repo, the replacement method wouldn't get called unless it was invoked with the unfiltered repo, because the filtered repo remains unchanged. Since this doesn't seem to be commonly used, I didn't bother to filter out methods that perhaps shouldn't be replaced, such as changelog().

log: fix log revset instability The log/graphlog revset was not producing stable results since it was iterating over a dict. Now we sort before iterating to guarantee a fixed order. This fixes some potential flakiness in the tests.

log: fix log -f slow path to actually follow history The revset created when -f was used with a slow path (for patterns and directories) did not actually contain any logic to enforce follow. Instead it was depending on the passed in subset to already be limited (which was limited to :. but not ::.). This fixes it by adding a '& ::.' to any -f log revset. hg log -f <file> is still broken, in that it can return results that aren't actually ancestors of the current file, but fixing that has major perf implications, so we'll deal with it later.

obsstore: cache size computation for fm1 node We have two different types of node type (sha1 and sha256, only sha1 is used now) and therefor different sizes for them. We now compute the value once instead of redoing the computation every loop. This has no visible performance impact.

obsstore: prefetch struct.calcsize This function is widely used and worth but be at module level. No specific performance boost is visible, but this is more consistent.

obsstore: disable garbage collection during initialization (issue4456) Python garbage collection is triggered by container creation. So code that creates a lot of tuples tends to trigger GC a lot. We disable the gc during obsolescence marker parsing and associated initialization. This provides an interesting speedup (25%). Load marker function on my 58758 markers repo: before: 0.468247 seconds after: 0.344362 seconds The benefit is a bit less visible overall. With python2.6 on my system I see: after: 0.60 before: 0.53 The difference is probably explained by the delaying of a costly GC. (but there is still a win). Marking involved tuples, lists and dicts as ignorable by the garbage collector should give us more benefit. But this is another adventure. Thanks goes to Siddharth Agarwal for the lead.