_addset: add a __len__ method Back in the time where repo.revs(...) returned a list, calling `len(...)` on the result was quite common. We reinstall this on _addset. There is absolutely no easy way to test this from the command line. The commands using this in the evolve extension will eventually land into core.

bundle2: implement the mandatory/advisory logic for parameter Parameter starting with an upper case are mandatory, the one starting with a lower case are advisory and may be ignored.

bundle2: print debug information during unbundling The unbundler class is now feed with an ui object and use it to transmit data about the unbundling process.

bundle2: print debug information during bundling The bundler class is now feed with an ui object and use it to transmit data about the bundling process.

bundle2: add ability to write to a file to the test Next changesets are about improving debug output during bundling. We won't be able to simply bundle to stdin in this case. The bundle2 stream would be interleaved with debug output.

subrepo: factor out Git version check to add doctests Followup to 6a2acb0d9352::e5641536e4d5.

contrib: add "hgperf" command to measure performance of commands easily Newly added "hgperf" command repeats "dispatch.runcommand()" for specified Mercurial command and measure performance of it in the same manner of "contrib/perf.py" extension. Users (mainly developers) can examine performance of the target command easily, without adding new entry for it to "contrib/perf.py" extension.

grep: exit loop immediately, if matching is found in the file for "hg grep -l" Before this patch, internal function "display()" of "hg grep" is not efficient for "-l"/"--files-with-matches", because loop is continued, even after the first matching is found in the specified file. This patch exits loop immediately, if matching is found for "--files-with-matches". In this case, "before is None" is equal to "opts.get('files_with_matches')".

grep: use "found" instead of "filerevmatches" examination for efficiency Before this patch, internal function "display()" of "hg grep" stores whether matching is already found or not into the dictionary "filerevmatches" by "(fn, rev)" tuple as the key. But this is redundant, because: - "filerevmatches" is local variable of "display()", so each "display()" invocations don't affect others - both "fn" and "rev" (gotten from "ctx" argument) are never changed in each "display()" invocations Then, "filerevmatches" should have only one entry at most, and "(fn, rev) in filerevmatches" should be equal to "found". This patch uses "found" instead of "filerevmatches" examination for efficiency.

grep: reuse the first "util.binary()" result for efficiency Before this patch, to check whether the file in the specified revision is binary or not, "util.binary()" is invoked via internal function "binary()" of "hg grep" once per a line of "hg grep" output, even though binary-ness is not changed in the same file. This patch reuses the first "util.binary()" invocation result by annotating internal function "binary()" with "@util.cachefunc". Performance improvement measured by "hgperf grep -r 88d8e568add1 vfs mercurial/scmutil.py": before this patch: ! wall 0.024000 comb 0.015600 user 0.015600 sys 0.000000 (best of 118) after this patch: ! wall 0.023000 comb 0.015600 user 0.015600 sys 0.000000 (best of 123) Status of recent(88d8e568add1) "mercurial/scmutil.py": # of lines: 919 (may affect cost of search) # of bytes: 29633 (may affect cost of "util.binary()") # of matches: 22 (may affect frequency of "util.binary()")