Mercurial > hg
view tests/test-repo-compengines.t @ 33269:ead6749354e1
phabricator: try to fetch differential revisions in batch
Previously, we read Differential Revisions one by one by calling
`differential.query`.
Fetching them one by one is suboptimal. Unfortunately, there is no Conduit
API that allows us to get a stack of diffids using a single API call.
This patch tries to be smarter using a simple heuristic: when fetching D59
as a stack, previous IDs like D51, D52, D53, ..., D58 are likely belonging
to a same stack so just fetch them as well. Since `differential.query` only
returns cheap metadata without expensive diff content, it shouldn't be a big
problem for the server.
Using a test Phabricator instance, this patch reduces `phabread` reading a
10 patch stack from about 13 to 30 seconds to 8 seconds.
author | Jun Wu <quark@fb.com> |
---|---|
date | Tue, 04 Jul 2017 16:36:48 -0700 |
parents | 4c0a5a256ae8 |
children | c2c8962a9465 |
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A new repository uses zlib storage, which doesn't need a requirement $ hg init default $ cd default $ cat .hg/requires dotencode fncache generaldelta revlogv1 store $ touch foo $ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text to trigger compression' $ hg debugrevlog -c | grep 0x78 0x78 (x) : 1 (100.00%) 0x78 (x) : 110 (100.00%) $ cd .. Unknown compression engine to format.compression aborts $ hg --config experimental.format.compression=unknown init unknown abort: compression engine unknown defined by experimental.format.compression not available (run "hg debuginstall" to list available compression engines) [255] A requirement specifying an unknown compression engine results in bail $ hg init unknownrequirement $ cd unknownrequirement $ echo exp-compression-unknown >> .hg/requires $ hg log abort: repository requires features unknown to this Mercurial: exp-compression-unknown! (see https://mercurial-scm.org/wiki/MissingRequirement for more information) [255] $ cd .. #if zstd $ hg --config experimental.format.compression=zstd init zstd $ cd zstd $ cat .hg/requires dotencode exp-compression-zstd fncache generaldelta revlogv1 store $ touch foo $ hg -q commit -A -m 'initial commit with a lot of repeated repeated repeated text' $ hg debugrevlog -c | grep 0x28 0x28 : 1 (100.00%) 0x28 : 98 (100.00%) $ cd .. Specifying a new format.compression on an existing repo won't introduce data with that engine or a requirement $ cd default $ touch bar $ hg --config experimental.format.compression=zstd -q commit -A -m 'add bar with a lot of repeated repeated repeated text' $ cat .hg/requires dotencode fncache generaldelta revlogv1 store $ hg debugrevlog -c | grep 0x78 0x78 (x) : 2 (100.00%) 0x78 (x) : 199 (100.00%) #endif