Summary:
According to pyd, Mercurial core now writes bundle2 bundles when the repo is
generaldelta, so we don't need this anymore. Plus we're using evolve now so
we're not producing many bundles anyway.
The motivation for disabling this is that the code broke due to changes from
upstream, and I was too lazy to fix it.
Test Plan: nope
Reviewers: pyd, ericsumner, #sourcecontrol
Differential Revision: https://phabricator.fb.com/D2538749
Summary:
Upstream has finalized bundle2 and removed the experimental flags. So let's
upgrade along with it.
Test Plan: Ran the tests
Reviewers: sid0, rmcelroy, lcharignon, pyd, ericsumner
Differential Revision: https://phabricator.fb.com/D2003046
Summary:
Through experiments we've found that for highly interleaved histories, generating a changegroup2 can be 6-7x as slow as generating a changegroup1.
While we work this out upstream, ship an extension to write changegroup2s out to disk.
Note that we'll only write cg2s for strips (and related operations like amend) -- for regular bundles we'll continue to write changegroup1 for maximum compatibility.
Test Plan:
Ran the included tests. Also ran the full Mercurial test suite with:
```
python run-tests.py -j32 --extra-config-opt extensions.writecg2=/home/sid0/local/fb-hgext/writecg2.py
```
Finally, tried it out in fbobjc. Found a 6x gain in strip performance with this extension enabled.
Reviewers: durham, davidsp, rmcelroy, akushner, daviser, mitrandir, ericsumner, pyd
Reviewed By: pyd
Differential Revision: https://phabricator.fb.com/D1774334
Signature: t1:1774334:1420844207:461b830aafd7728ea3b5593fe0a02f6f66444ec3
