**Related issue:** Resolves#44391
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.
## Testing
- [x] Added/updated automated tests
- [x] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)
- [x] QA'd all new/changed functionality manually
I tested this locally
number of ubuntu hosts: 6,252
average software per host: 2,302
distinct software items: 61,213
host_software rows: 14.4M
generates software_cve rows 305,826
OS sub-versions: 25
The time before my optimization **10m53s** down to **4m26s** the
optimization.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Optimized OSV vulnerability scanning to aggregate work by OS version
and batch lookups, reducing redundant queries for faster scans.
* **Refactor**
* Restructured scanning flow to process OS versions in batched chunks
with clearer logging and early exits when no work is required.
* **Tests**
* Added tests for querying, batching, source filtering, deduplication,
and empty-input behaviors.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
