Mercurial > hg
view tests/test-remotefilelog-bundle2.t @ 49672:e92de86cf4f8
emitrevision: consider ancestors revision to emit as available base
This should make more delta base valid. This notably affects:
* case where we skipped some parent with empty delta to directly delta against
an ancestors
* case where an intermediate snapshots is stored.
This change means we could sent largish intermediate snapshots over the wire.
However this is actually a sub goal here. Sending snapshots over the wire means
the client have a high odd of simply storing the pre-computed delta instead of
doing a lengthy process that will… end up doing the same intermediate snapshot.
In addition the overall size of snapshot (or any level) is "only" some or the
overall delta size. (0.17% for my mercurial clone, 20% for my clone of Mozilla
try). So Sending them other the wire is unlikely to change large impact on the
bandwidth used.
If we decide that minimising the bandwidth is an explicit goal, we should
introduce new logic to filter-out snapshot as delta. The current code has no
notion explicite of snapshot so far, they just tended to fall into the wobbly
filtering options.
In some cases, this patch can yield large improvement to the bundling time:
### data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
# benchmark.name = perf-bundle
# benchmark.variants.revs = last-100000
before: 68.787066 seconds
after: 47.552677 seconds (-30.87%)
That translate to large improvement to the pull time :
### data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
# benchmark.name = pull
# benchmark.variants.issue6528 = disabled
# benchmark.variants.revs = last-100000
before: 142.186625 seconds
after: 75.897745 seconds (-46.62%)
No significant negative impact have been observed.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Sat, 12 Nov 2022 00:18:41 +0100 |
parents | 68b7faeb6ef3 |
children |
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#require no-windows $ . "$TESTDIR/remotefilelog-library.sh" $ hg init master $ hg debugrequires -R master | grep generaldelta generaldelta $ cd master preferuncompressed = False so that we can make both generaldelta and non-generaldelta clones $ cat >> .hg/hgrc <<EOF > [remotefilelog] > server=True > [experimental] > bundle2-exp = True > [server] > preferuncompressed = False > EOF $ echo x > x $ hg commit -qAm x $ cd .. $ hgcloneshallow ssh://user@dummy/master shallow-generaldelta -q --pull --config experimental.bundle2-exp=True 1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob) $ hg debugrequires -R shallow-generaldelta/ | grep generaldelta generaldelta $ hgcloneshallow ssh://user@dummy/master shallow-plain -q --pull --config format.usegeneraldelta=False --config format.generaldelta=False --config experimental.bundle2-exp=True $ hg debugrequires -R shallow-plain/ | grep generaldelta [1] $ cd master $ echo a > a $ hg commit -qAm a pull from generaldelta to generaldelta $ cd ../shallow-generaldelta $ hg pull -u pulling from ssh://user@dummy/master searching for changes adding changesets adding manifests adding file changes added 1 changesets with 0 changes to 0 files new changesets 2fbb8bb2b903 1 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob) push from generaldelta to generaldelta $ echo b > b $ hg commit -qAm b $ hg push pushing to ssh://user@dummy/master searching for changes remote: adding changesets remote: adding manifests remote: adding file changes remote: added 1 changesets with 1 changes to 1 files pull from generaldelta to non-generaldelta $ cd ../shallow-plain $ hg pull -u pulling from ssh://user@dummy/master searching for changes adding changesets adding manifests adding file changes added 2 changesets with 0 changes to 0 files new changesets 2fbb8bb2b903:d6788bd632ca 2 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob) push from non-generaldelta to generaldelta $ echo c > c $ hg commit -qAm c $ hg push pushing to ssh://user@dummy/master searching for changes remote: adding changesets remote: adding manifests remote: adding file changes remote: added 1 changesets with 1 changes to 1 files