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path: root/plumbing/format/packfile/delta_selector.go
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* *: migration from gopkg to go modulesMáximo Cuadros2020-03-101-2/+2
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* plumbing: format/packfile, add SaveOriginalMetadata functionJavi Fontan2018-02-091-1/+1
| | | | Signed-off-by: Javi Fontan <jfontan@gmail.com>
* plumbing: format/packfile, fix panic retrieving object hash.Javi Fontan2018-02-091-2/+3
| | | | | | | | | | | | | | | | In some cases the original data is not saved before it is cleaned and forces a panic when it's needed. The change adds ObjectToPack.CleanOriginal to be used to clean original object instead of: object.Original = nil Now when the Original data is freed because it's no longer in the pack window a SetOriginal call is done to make sure that Size, Hash and Size data is not lost. Signed-off-by: Javi Fontan <jfontan@gmail.com>
* plumbing: format/packfile, fix crash with cycle deltasJavi Fontan2018-01-241-1/+2
| | | | | | | | | | | | Resolving cycles relied on ObjectToPack objects having Original. This is no longer true with the changes from #720. This commit changes: * Save original type, hash and size in ObjectToPack * Use SetObject to set both Original and resolved type, hash and size * Restore original object before using BackToOriginal (cycle resolution) * Update encoder test to check this case Signed-off-by: Javi Fontan <jfontan@gmail.com>
* Clean reconstructed objects outside pack windowJavi Fontan2018-01-111-13/+19
| | | | | | | | | | | Object walk reconstructs delta objects but these are not cleaned up after they got out the pack window. Without this change all reconstructed objects reside in memory. restoreOriginal call is moved before calling Size(). Now we can not guarantee that the object is already undeltified. Signed-off-by: Javi Fontan <javier@sourced.tech>
* Improve delta reutilizationAntonio Jesus Navarro Perez2017-12-201-5/+0
| | | | | | | | | | | - Remove wrong 'if' on delta selector that causes poor delta reutilizations - packfile.Encoder now can write deltas and objects in a non specific order - ObjectToPack now saves the Offset on the packfile to be able to obtain base offset in a recursive manner and write them before the delta itself - Added encoder test to check cyclic delta chains - Check the output packfile hash in all encoder tests Signed-off-by: Antonio Jesus Navarro Perez <antnavper@gmail.com>
* packfile: delete index maps from memory when no longer neededJeremy Stribling2017-10-301-0/+6
| | | | This helps keep memory usage stable while calculating deltas.
* config: support a configurable, and turn-off-able, pack.windowJeremy Stribling2017-09-111-12/+35
| | | | | | | | | | | | | | | | | | | | One use of go-git is to transfer git data from a non-standard git repo (not stored in a file system, for example) to a "remote" backed by a standard, local .git repo. In this scenario, delta compression is not needed to reduce transfer time over the "network", because there is no network. The underlying storage layer has already taken care of the data tranfer, and sending the objects to local .git storage doesn't require compression. So this PR gives the user the option to turn off compression when it isn't needed. Of course, this results in a larger, uncompressed local .git repo, but the user can then run git gc or git repack on that repo if they care about the storage costs. Turning the pack window to 0 on reduces total push time of a 36K repo by 50 seconds (out of a pre-PR total of 3m26s).
* packfile: parallelize deltification of objects in groupsMiguel Molina2017-09-071-1/+31
| | | | Signed-off-by: Miguel Molina <miguel@erizocosmi.co>
* packfile: use a modified version of JGit DeltaIndex and DeltaIndexScannerMiguel Molina2017-09-061-3/+3
| | | | Signed-off-by: Miguel Molina <miguel@erizocosmi.co>
* packfile: reuse delta indexes when possibleMiguel Molina2017-09-061-3/+8
| | | | Signed-off-by: Miguel Molina <miguel@erizocosmi.co>
* plumbing: use sliding window in delta calculations, like git CLJeremy Stribling2017-08-281-1/+4
| | | | | | | | | | This sets a default sliding window of 10 for the delta calculation, just like git CL: https://git-scm.com/docs/git-pack-objects#git-pack-objects---windowltngt For a big-ish repo with 35K objects (17K commits), this reduced the time for calling `deltaSelection.walk` during a push from more than 14 minutes to about a minute.
* plumbing: add IsDelta method to ObjectTypeSantiago M. Mola2017-07-271-6/+2
| | | | | ObjectType.IsDelta is a convenience function to match both offset and reference delta types.
* storage: reuse deltas from packfilesSantiago M. Mola2017-07-271-10/+139
| | | | | | | | | | | | | | | | | | | * plumbing: add DeltaObject interface for EncodedObjects that are deltas and hold additional information about them, such as the hash of the base object. * plumbing/storer: add DeltaObjectStorer interface for object storers that can return DeltaObject. Note that calls to EncodedObject will never return instances of DeltaObject. That requires explicit calls to DeltaObject. * storage/filesystem: implement DeltaObjectStorer interface. * plumbing/packfile: packfile encoder now supports reusing deltas that are already computed (e.g. from an existing packfile) if the storage implements DeltaObjectStorer. Reusing deltas boosts performance of packfile generation (e.g. on push).
* format/packfile: fix bug when the delta depth is equals to 50Antonio Jesus Navarro Perez2017-05-081-0/+5
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* project: move imports from srcd.works to gopkg.inAntonio Jesus Navarro Perez2017-03-071-2/+2
| | | | To be able to fix #261 we will move again to gopkg.in before v4 stable release.
* new srcd.works/go-git.v4 pathMáximo Cuadros2017-01-301-2/+2
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* packfile: delta selection logic (#182)Antonio Navarro Perez2016-12-161-0/+169
* packfile: delta selection logic - Implemented logic to assign deltas to objects * Requested changes * Improved tests and fix errors
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