revlog: move chunk cache preload from revision to _chunks In case we don't have a cached text already, add the base rev to the list passed to _chunks. In the cached case this also avoids unnecessarily preloading the chunk for the cached rev.

revlog._chunks: inline getchunk We do this in a somewhat hacky way, relying on the fact that our sole caller preloads the cache right before calling us. An upcoming patch will make this more sensible. For a 20 MB manifest with a delta chain of > 40k, perfmanifest goes from 0.49 seconds to 0.46.

revlog.revision: fix cache preload for inline revlogs Previously the length of data preloaded did not account for the interleaved io contents. This meant that we'd sometimes have cache misses in _chunks despite the preloading. Having a correctly filled out cache will become essential in an upcoming patch.

revlog: add a fast method for getting a list of chunks This moves _chunkraw into the loop. Doing that improves revlog decompression -- in particular, manifest decompression -- significantly. For a 20 MB manifest which is the result of a > 40k delta chain, hg perfmanifest improves from 0.55 seconds to 0.49 seconds.

perfmanifest: allow and require passing in a rev Previously perfmanifest would only test tip.

perfmanifest: fix cache invalidation The manifest cache is now stored in _mancache. The revlog cache is still stored in _cache.

lrucachedict: implement clear()

merge with stable

bundle: fix performance regression when bundling file changes (issue4031) Somewhere before 2.7, a change [ec896f9e8894] was committed that entailed a large performance regression when bundling (and therefore remote cloning) repositories. For each file in the repository, it would recompute the set of needed changesets even though it is the same for all files. This computation would dominate bundle runtimes according to profiler output (by 10x or more).

merge with stable

revset: fix wrong keyword() behaviour for strings with spaces Some changesets can be wrongly reported as matched by this predicate due to searching in a string joined with spaces and not individually. A test case added, which fails without this fix.

commitablefilectx: move children from workingfilectx