feat: improve store.get performance when atoms are not mutated

[dmaskasky]

Related Bug Reports or Discussions

edkimmel#3

#3259

fix #2334

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Project	Deployment	Actions	Updated (UTC)
jotai	Ready	Preview, Comment	Mar 24, 2026 2:25am

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[edkimmel]

@dmaskasky @dai-shi
Here are the benchmark and tests I have to show this problem as well. The problem is more accurately in readAtomState's recursive traversal.

edkimmel@63baf73

And here is a commit that passes those tests
edkimmel@2c052d5

I am realizing now that in the new world of building blocks, any one of these functions could be replaced. The solution linked may not be desired because it puts new data requirements on any library taking over those building blocks.

[github-actions]

Preview in LiveCodes

Latest commit: ca572a3
Last updated: Mar 24, 2026 2:25am (UTC)

Playground	Link
React demo	https://livecodes.io?x=id/GYXZFXN2E

---

See documentations for usage instructions.

[pkg-pr-new]

More templates

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• hello
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npm i https://pkg.pr.new/jotai@3265

commit: ca572a3

[dai-shi]

/ecosystem-ci run

[github-actions]

Ecosystem CI Output

---- Jotai Ecosystem CI Results ----
{
  "bunshi": "PASS",
  "jotai-devtools": "FAIL",
  "jotai-effect": "PASS",
  "jotai-family": "PASS",
  "jotai-scope": "PASS",
  "waku-jotai": "PASS"
}

https://github.com/pmndrs/jotai/actions/runs/23346637623

[dai-shi]

/ecosystem-ci run

[github-actions]

Ecosystem CI Output

---- Jotai Ecosystem CI Results ----
{
  "bunshi": "PASS",
  "jotai-devtools": "FAIL",
  "jotai-effect": "PASS",
  "jotai-family": "PASS",
  "jotai-scope": "PASS",
  "waku-jotai": "PASS"
}

https://github.com/pmndrs/jotai/actions/runs/23348135076

[dai-shi]

@arjunvegda Could you please check how jotai-devtools is failing?

[arjunvegda]

/ecosystem-ci run

[github-actions]

Ecosystem CI Output

---- Jotai Ecosystem CI Results ----
{
  "bunshi": "PASS",
  "jotai-devtools": "PASS",
  "jotai-effect": "PASS",
  "jotai-family": "PASS",
  "jotai-scope": "PASS",
  "waku-jotai": "PASS"
}

https://github.com/pmndrs/jotai/actions/runs/23455636067

[dai-shi]

Thanks!!