gitea

Commit Graph

Author	SHA1	Message	Date
John Olheiser	a48d6ba4b4	Go 1.19 format (#20758 ) * 1.19 gofumpt Signed-off-by: jolheiser <john.olheiser@gmail.com> * Change CSV test Signed-off-by: jolheiser <john.olheiser@gmail.com> * Commit whitespace fixes from @zeripath Co-authored-by: zeripath <art27@cantab.net> * Update emoji Signed-off-by: jolheiser <john.olheiser@gmail.com> * bump swagger & fix generate-swagger Signed-off-by: jolheiser <john.olheiser@gmail.com> Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de> Co-authored-by: Lauris BH <lauris@nix.lv>	2 years ago
Peter Gardfjäll	e28cc79c92	Improve sync performance for pull-mirrors (#19125 ) This addresses https://github.com/go-gitea/gitea/issues/18352 It aims to improve performance (and resource use) of the `SyncReleasesWithTags` operation for pull-mirrors. For large repositories with many tags, `SyncReleasesWithTags` can be a costly operation (taking several minutes to complete). The reason is two-fold: 1. on sync, every upstream repo tag is compared (for changes) against existing local entries in the release table to ensure that they are up-to-date. 2. the procedure for getting _each tag_ involves a series of git operations ```bash git show-ref --tags -- v8.2.4477 git cat-file -t 29ab6ce9f36660cffaad3c8789e71162e5db5d2f git cat-file -p 29ab6ce9f36660cffaad3c8789e71162e5db5d2f git rev-list --count 29ab6ce9f36660cffaad3c8789e71162e5db5d2f ``` of which the `git rev-list --count` can be particularly heavy. This PR optimizes performance for pull-mirrors. We utilize the fact that a pull-mirror is always identical to its upstream and rebuild the entire release table on every sync and use a batch `git for-each-ref .. refs/tags` call to retrieve all tags in one go. For large mirror repos, with hundreds of annotated tags, this brings down the duration of the sync operation from several minutes to a few seconds. A few unscientific examples run on my local machine: - https://github.com/spring-projects/spring-boot (223 tags) - before: `0m28,673s` - after: `0m2,244s` - https://github.com/kubernetes/kubernetes (890 tags) - before: `8m00s` - after: `0m8,520s` - https://github.com/vim/vim (13954 tags) - before: `14m20,383s` - after: `0m35,467s` I added a `foreachref` package which contains a flexible way of specifying which reference fields are of interest (`git-for-each-ref(1)`) and to produce a parser for the expected output. These could be reused in other places where `for-each-ref` is used. I'll add unit tests for those if the overall PR looks promising.	3 years ago

Author

SHA1

Message

Date

John Olheiser

a48d6ba4b4

Go 1.19 format (#20758 )

* 1.19 gofumpt

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Change CSV test

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Commit whitespace fixes from @zeripath

Co-authored-by: zeripath <art27@cantab.net>

* Update emoji

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* bump swagger & fix generate-swagger

Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lauris BH <lauris@nix.lv>

2 years ago

Peter Gardfjäll

e28cc79c92

Improve sync performance for pull-mirrors (#19125 )

This addresses https://github.com/go-gitea/gitea/issues/18352

It aims to improve performance (and resource use) of the `SyncReleasesWithTags` operation for pull-mirrors.

For large repositories with many tags, `SyncReleasesWithTags` can be a costly operation (taking several minutes to complete). The reason is two-fold:

1. on sync, every upstream repo tag is compared (for changes) against existing local entries in the release table to ensure that they are up-to-date.

2. the procedure for getting _each tag_ involves a series of git operations
```bash
git show-ref --tags -- v8.2.4477
git cat-file -t 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
git cat-file -p 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
git rev-list --count 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
```

of which the `git rev-list --count` can be particularly heavy.

This PR optimizes performance for pull-mirrors. We utilize the fact that a pull-mirror is always identical to its upstream and rebuild the entire release table on every sync and use a batch `git for-each-ref .. refs/tags` call to retrieve all tags in one go.

For large mirror repos, with hundreds of annotated tags, this brings down the duration of the sync operation from several minutes to a few seconds. A few unscientific examples run on my local machine:

- https://github.com/spring-projects/spring-boot (223 tags)
- before: `0m28,673s`
- after: `0m2,244s`
- https://github.com/kubernetes/kubernetes (890 tags)
- before: `8m00s`
- after: `0m8,520s`
- https://github.com/vim/vim (13954 tags)
- before: `14m20,383s`
- after: `0m35,467s`

I added a `foreachref` package which contains a flexible way of specifying which reference fields are of interest (`git-for-each-ref(1)`) and to produce a parser for the expected output. These could be reused in other places where `for-each-ref` is used. I'll add unit tests for those if the overall PR looks promising.

3 years ago

2 Commits (e77b76425e5ae205d6db2c78ab7b31fbc1b186a6)