changelog: keep track of file end in appender (issue5444) Previously, changelog.appender.end() would compute the end of the file by joining all the current appended data and checking the length. This is an O(n) operation. e240e914d226 introduced a seek call before every revlog write, which means we are hitting this O(n) behavior n times, which causes changelog writes during a pull to be n^2. In our large repo, this caused pulling 100k commits to go from 17s to 130s. With this fix, it's back to 17s.

tests: fix test-bdiff to handle variance between pure and c bdiff code Obviously we'd rather patch pure to have the same algorithmic win as the C code, but this is a quick fix for the pure build since pure isn't wrong, just not as fast as it could be.

tests: finish updating test-bdiff to unittest (part 4 of 4)

tests: update more of test-bdiff.py to use unittest (part 3 of 4)

tests: update more of test-bdiff.py to use unittest (part 2 of 4)

tests: migrate test-bdiff.py to use unittest (part 1 of 4) This moves all the test() calls, which were easy and mechanical.

import-checker: do not enforce lexical sort accross stdlib/local boundary Before this change, you could get in a start where the checker would either complain about importing local module before stdlib one or complain about the local one being wrongly lexically sorted with the stdlib one. We detect the boundary and avoid complaining about lexical sort across it.

cg1packer: fix `compressed` method `cg1packer.compressed()` returns True even if `self._type` is 'UN'. This patch fixes it.

perf: add historical support of ui.load() ui.load() has been available since d83ca854 and at the time of writing isn't available on stable branch breaking benchmarking newer stable revisions. Add historical portability policy note on contrib/benchmarks

chg: ignore HG_* in confighash The environment variables `HG_*` are usually used by hooks. Unlike `HGPLAIN` etc, they do not actually affect hg's behavior. So do not include them in confighash. This would avoid spawning an unbound number of chg server processes if commit hook calls hg frequently.