During streaming, every token change triggers a full JSON.stringify comparison on the code block token object. Add an O(1) fast-path check on token.text and token.raw — the fields that actually change during streaming — before falling back to the expensive JSON.stringify comparison for infrequent structural changes.
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🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.
## 📋 Pull Request Information
**Original PR:** https://github.com/open-webui/open-webui/pull/22101
**Author:** [@Classic298](https://github.com/Classic298)
**Created:** 3/1/2026
**Status:** ✅ Merged
**Merged:** 3/1/2026
**Merged by:** [@tjbck](https://github.com/tjbck)
**Base:** `dev` ← **Head:** `perf/codeblock-fastpath`
---
### 📝 Commits (1)
- [`d642a1d`](https://github.com/open-webui/open-webui/commit/d642a1df9279190b74cde99b7d998cf2ccea3d4b) perf: fast-path token comparison in CodeBlock
### 📊 Changes
**1 file changed** (+3 additions, -1 deletions)
<details>
<summary>View changed files</summary>
📝 `src/lib/components/chat/Messages/CodeBlock.svelte` (+3 -1)
</details>
### 📄 Description
During streaming, every token change triggers a full JSON.stringify comparison on the code block token object. Add an O(1) fast-path check on token.text and token.raw — the fields that actually change during streaming — before falling back to the expensive JSON.stringify comparison for infrequent structural changes.
### Contributor License Agreement
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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/22101
Author: @Classic298
Created: 3/1/2026
Status: ✅ Merged
Merged: 3/1/2026
Merged by: @tjbck
Base:
dev← Head:perf/codeblock-fastpath📝 Commits (1)
d642a1dperf: fast-path token comparison in CodeBlock📊 Changes
1 file changed (+3 additions, -1 deletions)
View changed files
📝
src/lib/components/chat/Messages/CodeBlock.svelte(+3 -1)📄 Description
During streaming, every token change triggers a full JSON.stringify comparison on the code block token object. Add an O(1) fast-path check on token.text and token.raw — the fields that actually change during streaming — before falling back to the expensive JSON.stringify comparison for infrequent structural changes.
Contributor License Agreement
By submitting this pull request, I confirm that I have read and fully agree to the Contributor License Agreement (CLA), and I am providing my contributions under its terms.
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.