Mercurial > hg-stable
view tests/test-convert-bzr-treeroot.t @ 42480:66c27df1be84
deltas: skip if projected delta size is bigger than previous snapshot
Before computing any delta, we get a basic estimation of the delta size we can
expect and the resulted compressed value. We then checks this projected size
against the `size(snapshotⁿ) > size(snapshotⁿ⁺¹)` constraint. This allows to
exclude potential base candidates before doing any expensive computation.
This only apply to the intermediate-snapshot case since this constraint only
apply to them.
For some pathological cases of a private repository this step provide a
significant performance boost (timing from `hg perfrevlogwrite`):
before: 14.115908 seconds
after: 3.145906 seconds
author | Valentin Gatien-Baron <vgatien-baron@janestreet.com> |
---|---|
date | Thu, 25 Apr 2019 22:50:33 +0200 |
parents | 5abc47d4ca6b |
children | 26127236b229 |
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#require bzr $ . "$TESTDIR/bzr-definitions" $ cat > treeset.py <<EOF > import sys > from bzrlib import workingtree > wt = workingtree.WorkingTree.open('.') > > message, rootid = sys.argv[1:] > wt.set_root_id('tree_root-%s' % rootid) > wt.commit(message) > EOF change the id of the tree root $ mkdir test-change-treeroot-id $ cd test-change-treeroot-id $ bzr init -q source $ cd source $ echo content > file $ bzr add -q file $ bzr commit -q -m 'Initial add' $ "$PYTHON" ../../treeset.py 'Changed root' new $ cd .. $ hg convert source source-hg initializing destination source-hg repository scanning source... sorting... converting... 1 Initial add 0 Changed root $ manifest source-hg tip % manifest of tip 644 file $ cd ..