langgenius/dify
1
0
Fork 0
mirror of https://github.com/langgenius/dify.git synced 2026-07-21 20:15:31 -04:00
Code Issues 775 Packages Projects Releases 10 Wiki Activity

The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem? #15103

New Issue
Closed
opened 2026-02-21 19:20:11 -05:00 by yindo · 2 comments
yindo commented 2026-02-21 19:20:11 -05:00
Owner
Copy Link
Copy Source

Originally created by @zhangleijun111 on GitHub (Jul 3, 2025).

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:)
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.5.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem?

✔️ Expected Behavior

The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem?

❌ Actual Behavior

The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem?

Originally created by @zhangleijun111 on GitHub (Jul 3, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:) - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.5.1 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem? ### ✔️ Expected Behavior The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem? ### ❌ Actual Behavior The typing becomes very laggy after adding the question classifier to 20 lines. What is causing this problem?
yindo added the 🤔 cant-reproduce label 2026-02-21 19:20:11 -05:00
yindo closed this issue 2026-02-21 19:20:11 -05:00
yindo commented 2026-02-21 19:20:11 -05:00
Author
Owner
Copy Link
Copy Source

@dosubot[bot] commented on GitHub (Jul 3, 2025):

The laggy typing after adding the question classifier to 20 lines is most likely caused by the way the classifier is triggered in the frontend and processed in the backend. If the frontend triggers classification on every keystroke without proper debouncing or throttling, and the backend processes each request synchronously, this can quickly overwhelm the system—especially when scaled to many lines or fields. This results in noticeable input lag as each keystroke may wait for a classification response before updating the UI.

Recent updates have focused on improving the stability of the question classifier, but there haven't been specific optimizations for performance or typing lag yet (source, source).

To mitigate the lag, check if you can reduce the frequency of classifier invocations (for example, by adding debouncing in the frontend so classification only happens after the user pauses typing), or limit the number of simultaneous classifier instances. If you can clarify whether "20 lines" means 20 input fields or 20 lines in a single field, I can help with more targeted suggestions.

To reply, just mention @dosu.

How did I do? Good | Irrelevant | Incorrect | Verbose | Hallucination | Report 🐛 | Other  Join Discord Share on X

@dosubot[bot] commented on GitHub (Jul 3, 2025): <!-- Answer --> The laggy typing after adding the question classifier to 20 lines is most likely caused by the way the classifier is triggered in the frontend and processed in the backend. If the frontend triggers classification on every keystroke without proper debouncing or throttling, and the backend processes each request synchronously, this can quickly overwhelm the system—especially when scaled to many lines or fields. This results in noticeable input lag as each keystroke may wait for a classification response before updating the UI. Recent updates have focused on improving the stability of the question classifier, but there haven't been specific optimizations for performance or typing lag yet ([source](https://github.com/langgenius/dify/pull/20897), [source](https://github.com/langgenius/dify/pull/12075)). To mitigate the lag, check if you can reduce the frequency of classifier invocations (for example, by adding debouncing in the frontend so classification only happens after the user pauses typing), or limit the number of simultaneous classifier instances. If you can clarify whether "20 lines" means 20 input fields or 20 lines in a single field, I can help with more targeted suggestions. <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot).* --- <sup>How did I do? [Good](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=great_response) | [Irrelevant](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=irrelevant_answer) | [Incorrect](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=incorrect_sources) | [Verbose](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=hallucination) | [Report 🐛](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/862a881b-9458-4c6b-99a8-33f1fc50887f?feedback_type=other)</sup>&nbsp;&nbsp;[![Join Discord](https://img.shields.io/badge/join-5865F2?logo=discord&logoColor=white&label=)](https://go.dosu.dev/discord-bot)&nbsp;[![Share on X](https://img.shields.io/badge/X-share-black)](https://twitter.com/intent/tweet?text=%40dosu_ai%20helped%20me%20solve%20this%20issue!&url=https%3A//github.com/langgenius/dify/issues/21885)
yindo commented 2026-02-21 19:20:12 -05:00
Author
Owner
Copy Link
Copy Source

@crazywoola commented on GitHub (Jul 3, 2025):

https://github.com/langgenius/dify/blob/0277a37fcad5ad86aeb239485c27fffd5cd90043/CONTRIBUTING.md#L23-L32

@crazywoola commented on GitHub (Jul 3, 2025): https://github.com/langgenius/dify/blob/0277a37fcad5ad86aeb239485c27fffd5cd90043/CONTRIBUTING.md#L23-L32
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
Knowledge Pipeline
Proposal
WIP
cloud
dependencies
feat:webapp
good first issue
outdated
performance
pull-request
Mirrored from GitHub Pull Request
 python:uv
refactor
size:L
stale
status: accepting prs
status: blocked
status: in discussion
stt & tts
vulnerablity
web
wont-fix
🌊 feat:workflow
🌚 invalid
🐞 bug
👻 feat:rag
💪 enhancement
📚 documentation
🔨 feat:tools
🙋‍♂️ question
🙏 help wanted
🤔 cant-reproduce
🤖 feat:agent
No Label 🤔 cant-reproduce
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
yindo
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: langgenius/dify#15103
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?