gitlab-org--gitlab-foss/changelogs/unreleased/sh-preload-associations-for-group-api.yml at 503061217e010e74d155464be7dfd8e9754776db - kotovalexarian-likes-gitlab/gitlab-org--gitlab-foss - Forgejo by Causa Arcana

kotovalexarian-likes-gitlab/gitlab-org--gitlab-foss

Stan Hu f9e217872d Eliminate N+1 queries in /api/groups/:id

In https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15475/diffs, a
significant amount of work went into eliminating N+1 queries in the
/api/groups/:id/projects endpoint. We can reuse the
`Entities::Project.prepare_relation` call on the projects.

In a group with 2,573 projects on GitLab.com, this change significantly
improves performance:

* 18019 SQL queries down to 21
* Time spent in DB: 70 s down to 384 ms

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/49845

2019-01-19 22:17:29 -08:00

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 title: Eliminate N+1 queries in /api/groups/:id
 merge_request: 24513
 author:
 type: performance