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[PR #29928] perf: using gevent pool instead of thread pool executor #32621

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opened 2026-02-21 20:51:45 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:51:45 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/29928

State: closed
Merged: No

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

optimize #29750

using gevent pool instead of thread pool executor

Current: ThreadPoolExecutor

Per query:

  • 3 worker threads × 8 MB = 24 MB memory
  • Thread creation / teardown overhead
  • Context-switch cost

Switch to: gevent.pool

Per query:

  • 3 greenlets × 4 KB = 12 KB memory
  • Greenlet spawn / destroy is almost free
  • User-space scheduler, negligible switch cost

Screenshots

Before After
... ...

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/29928 **State:** closed **Merged:** No --- > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 1. Ensure there is an associated issue and you have been assigned to it > 1. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary optimize #29750 using gevent pool instead of thread pool executor # Current: ThreadPoolExecutor Per query: - 3 worker threads × 8 MB = 24 MB memory - Thread creation / teardown overhead - Context-switch cost # Switch to: gevent.pool Per query: - 3 greenlets × 4 KB = 12 KB memory - Greenlet spawn / destroy is almost free - User-space scheduler, negligible switch cost ## Screenshots | Before | After | |--------|-------| | ... | ... | ## Checklist - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [x] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:51:45 -05:00
yindo closed this issue 2026-02-21 20:51:45 -05:00
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Reference: langgenius/dify#32621
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