d9fc50a perf: use set for O(1) lookup in insert_chat_files dedupe
📊 Changes
1 file changed (+3 additions, -3 deletions)
View changed files
📝backend/open_webui/models/chats.py (+3 -3)
📄 Description
Convert chat_message_file_ids from list to set so the membership test in the comprehension is O(1) instead of O(m), turning the dedupe from O(n*m) into O(n+m). Also replace the redundant set([...]) with a set comprehension.
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## 📋 Pull Request Information
**Original PR:** https://github.com/open-webui/open-webui/pull/23800
**Author:** [@Classic298](https://github.com/Classic298)
**Created:** 4/16/2026
**Status:** ✅ Merged
**Merged:** 4/17/2026
**Merged by:** [@tjbck](https://github.com/tjbck)
**Base:** `dev` ← **Head:** `claude/optimize-file-dedup-2j97H`
---
### 📝 Commits (1)
- [`d9fc50a`](https://github.com/open-webui/open-webui/commit/d9fc50a680f15903fa27d3b66fc763433e5ed856) perf: use set for O(1) lookup in insert_chat_files dedupe
### 📊 Changes
**1 file changed** (+3 additions, -3 deletions)
<details>
<summary>View changed files</summary>
📝 `backend/open_webui/models/chats.py` (+3 -3)
</details>
### 📄 Description
Convert chat_message_file_ids from list to set so the membership test in the comprehension is O(1) instead of O(m), turning the dedupe from O(n*m) into O(n+m). Also replace the redundant set([...]) with a set comprehension.
### Contributor License Agreement
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- [X] By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](https://github.com/open-webui/open-webui/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms.
> [!NOTE]
> Deleting the CLA section will lead to immediate closure of your PR and it will not be merged in.
---
<sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
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📋 Pull Request Information
Original PR: https://github.com/open-webui/open-webui/pull/23800
Author: @Classic298
Created: 4/16/2026
Status: ✅ Merged
Merged: 4/17/2026
Merged by: @tjbck
Base:
dev← Head:claude/optimize-file-dedup-2j97H📝 Commits (1)
d9fc50aperf: use set for O(1) lookup in insert_chat_files dedupe📊 Changes
1 file changed (+3 additions, -3 deletions)
View changed files
📝
backend/open_webui/models/chats.py(+3 -3)📄 Description
Convert chat_message_file_ids from list to set so the membership test in the comprehension is O(1) instead of O(m), turning the dedupe from O(n*m) into O(n+m). Also replace the redundant set([...]) with a set comprehension.
Contributor License Agreement
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.