chore: update Node.js version to 22.21.0

[jamesbhobbs]

Summary

Updates Node.js version to 22.21.0 in both .nvmrc files:

• Root .nvmrc: 22.15.1 → 22.21.0 (minor version bump)
• src/test/vscode-notebook-perf/.nvmrc: v20.17.0 → 22.21.0 (major version jump)

⚠️ Important: The performance test folder was previously on Node 20.x and is now being upgraded to Node 22.x - please verify this is intentional.

Context

Part of a Node version standardization across Deepnote repositories.

Link to Devin run: https://app.devin.ai/sessions/a8df8bf73298496b951e1c6812528db3
Requested by: James Hobbs (james@deepnote.com) / @jamesbhobbs

Review Checklist

• Critical: Confirm src/test/vscode-notebook-perf should be on Node 22 (was intentionally on Node 20)
• Verify all CI checks pass, especially native module builds (zeromq, etc.)
• Test local development: nvm use && npm install && npm test
• Check performance benchmarks still run correctly and produce consistent results
• Verify no dependency compatibility warnings with Node 22.21.0

Summary by CodeRabbit

Chores

• Updated Node.js version specifications in project configuration files to ensure consistent development environments.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Node.js version specifications in two .nvmrc files are updated. The root .nvmrc changes from 22.15.1 to 22.21.0, and the test folder .nvmrc changes from v20.17.0 to 22.21.0, standardizing both to the same version.

Possibly related PRs

• chore(deps): update non-major dependencies deepnote#42: Modifies .nvmrc Node.js runtime version in the same way.
• chore: Use .nvmrc for Node version in CI/CD workflows and npm install in post-checkout hook #92: Updates Node version strings in .nvmrc files and relates to workflow changes that read node-version from .nvmrc.
• deepnote/deepnote-internal#18461: Updates .nvmrc version files while modifying CI to source Node versions from .nvmrc.

Suggested reviewers

• Artmann

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title "chore: update Node.js version to 22.21.0" directly and accurately summarizes the main change in the PR. Both modified .nvmrc files are updated to Node.js 22.21.0, and the title clearly conveys this primary objective. The title is specific about what is being updated and to what version, avoiding vague or generic phrasing, while following standard commit message conventions.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 553a99f and ff5df51.

📒 Files selected for processing (2)

• .nvmrc (1 hunks)
• src/test/vscode-notebook-perf/.nvmrc (1 hunks)

🧰 Additional context used

🧠 Learnings (2)

📓 Common learnings

Learnt from: CR
PR: deepnote/deepnote-internal#0
File: CLAUDE.md:0-0
Timestamp: 2025-09-29T10:19:33.783Z
Learning: Applies to {.nvmrc,.node-version,package.json} : Use Node.js 22 for this project (e.g., nvm use 22)

📚 Learning: 2025-09-29T10:19:33.783Z

Learnt from: CR
PR: deepnote/deepnote-internal#0
File: CLAUDE.md:0-0
Timestamp: 2025-09-29T10:19:33.783Z
Learning: Applies to {.nvmrc,.node-version,package.json} : Use Node.js 22 for this project (e.g., nvm use 22)

Applied to files:

• .nvmrc
• src/test/vscode-notebook-perf/.nvmrc

🔇 Additional comments (2)

src/test/vscode-notebook-perf/.nvmrc (1)

1-1: Verify the Node 20→22 jump is intentional and re-baseline performance.

This moves the perf test suite from Node 20 to 22—a major version upgrade that affects performance baselines and native module builds. Confirm this aligns with your testing strategy and that performance benchmarks have been re-run.

.nvmrc (1)

1-1: LGTM. Standardizing to 22.21.0 aligns with project conventions. Ensure nvm use && npm install succeeds locally and CI passes.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71%. Comparing base (553a99f) to head (ff5df51).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

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##            main    #105   +/-   ##
=====================================
  Coverage     71%     71%           
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  Files        527     527           
  Lines      39474   39474           
  Branches    4933    4933           
=====================================
  Hits       28277   28277           
  Misses      9563    9563           
  Partials    1634    1634           

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[saltenasl]

I think we should get rid of telemetry tests before we reimplement them to work for deepnote notebooks. They currently are meant so send telemetry data reg. how fast jupyter block outputs for text, html, image render. There's also no ci check that runs them.

[saltenasl]

Admin merging