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mtesauro merged 3 commits into from
Oct 6, 2025
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upgrade notes: explain performance improvements 2.51 #13287

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upgrade notes: explain performance benefits
valentijnscholten Sep 30, 2025
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add two prs
valentijnscholten Oct 3, 2025
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Merge branch 'dev' into perf-upgrade-notes
valentijnscholten Oct 3, 2025
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12 changes: 12 additions & 0 deletions docs/content/en/open_source/upgrading/2.51.md
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description: Helm chart changes and Postgres major version updates.
---

## Performance improvements

This release includes multiple improvements aimed at making DefectDojo faster, more scalable, and lighter on your database and workers.

- Import and reimport are significantly more efficient: product grading is now orchestrated in batches using Celery chords, reducing the number of background tasks and database churn during large scans. This means faster imports and smoother post-processing on busy systems. See [PR 12914](https://github.com/DefectDojo/django-DefectDojo/pull/12914).
- Query-count reductions and importer hot-path tuning: we trimmed unnecessary ORM calls and optimized how findings/endpoints are updated during (re)import. You should see noticeably quicker runs out of the box. See [PR 13182](https://github.com/DefectDojo/django-DefectDojo/pull/13182) and [PR 13152](https://github.com/DefectDojo/django-DefectDojo/pull/13152).
- Smarter background task orchestration for product graing: less duplicate work and better scheduling during heavy operations, keeping the UI responsive while long jobs run. See [PR 12900](https://github.com/DefectDojo/django-DefectDojo/pull/12900).
- Bulk tag addition for large batches: adds an internal method to add tags to many findings at once, performing tagging in batches (default 1,000) with only a few queries per batch. This replaces ~3 queries per finding with ~3 queries per batch, significantly reducing DB load during imports, reimports, and bulk edit. On a ~10k-findings sample, import time dropped from ~372s to ~190s. See [PR 13285](https://github.com/DefectDojo/django-DefectDojo/pull/13285).
- Preparations for our switch to `django-pghistory` which provides more features and better performance compared to `django-auditlog`. See [PR 13169](https://github.com/DefectDojo/django-DefectDojo/pull/13169).

No configuration changes are required—gains are automatic after upgrading.

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## Helm Chart Changes

This release introduces several important changes to the Helm chart configuration:
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