hg: establish a cache for localrepository instances hgweb contained code for determining whether a cached localrepository instance was up to date. This code was way too low-level to be in hgweb. This functionality has been moved to a new "cachedlocalrepo" class in hg.py. The code has been changed slightly to facilitate use inside a class. hgweb has been refactored to use the new API. As part of this refactor, hgweb.repo no longer exists! We're very close to using a distinct repo instance per thread. The new cache records state when it is created. This intelligence prevents an extra localrepository from being created on the first hgweb request. This is why some redundant output from test-extension.t has gone away.

hgweb: create function to perform actions on new repo We perform some common tasks when a new repo instance is obtained. In preparation for changing how we obtain repo instances, factor this functionality into a standalone function.

hgweb: remove proxy to hgweb instance We were temporarily routing attributes until all request-specific attributes from hgweb were moved to requestcontext. We have finally reached that juncture and we can remove the proxy. At this point, only the repo instance is prone to race conditions between threads. This will be dealt with shortly.

dispatch: disable demandimport when invoking the debugger Turns out that demandimport confuses pudb, which does some pretty complicated imports. I think it's reasonable to disable demandimport here.

templater: create string unescape helper (issue4798) This gives us a unified place to do error-handling of string-escaping syntax errors

parsers: use PyTuple_New and SET_ITEM to construct metadata pair of markers With these 2 patches, fm1readmarkers() gets slightly faster: obsolete._fm1readmarkers() for 78644 entries 58.0 -> 56.2msec

parsers: use PyTuple_SET_ITEM() to fill new marker tuples Because we know these tuples have no member yet, PyTuple_SetItem() isn't necessary.

revset: uncache filteredset.__contains__ Since 96b6b3d78697, condition function returns a cached value, so there's little benefit to cache __contains__. No measurable difference found in contrib/base-revsets.txt.