syncthing / syncthing/syncthing

Regression (since 2.1.0): very slow scanning when dealing with identical files

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#10,869 1 comment 0 reactions 0 assignees View on GitHub

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bug needs-triage
Dominant language
Go
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Avg merge
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Merged PRs (30d)
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Description

What happened?

Creating a new issue since #10777 was closed, I cannot reopen it, my requests to reopen it (here and here) were ignored, and the regression was not fixed.

I can provide new support bundles when the final release of 2.1.4 with https://github.com/syncthing/syncthing/pull/10849 is out.

Syncthing version

v2.1.3

Platform & operating system

Arch Linux x86_64

Browser version

No response

Relevant log output

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source file, test, or entry point is named. Start by reviewing issue #10777 and reproducing the slow scan with identical files on Syncthing v2.1.3; compare behavior with the regression introduced since 2.1.0. Done means identifying and fixing the regression, then verifying scan performance with an updated support bundle.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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