blog: TanStack Virtual just got a lot faster, and finally handles iOS

[tannerlinsley]

Summary

• New blog post at /blog/tanstack-virtual-perf-and-ios
• Covers the recent virtual-core perf release: lazy typed-array fast path, iOS Safari deferral, backward-scroll default change, takeSnapshot() API, and the Map-clone bug story
• Library tag: virtual
• Author: Tanner Linsley
• Published date: 2026-05-19

Verification

• pnpm content:build clean (frontmatter schema validates)
• pnpm test clean (0 errors, 10 pre-existing warnings unrelated to this PR)
• pnpm test:smoke blog post resolves (✓ blog post); the query/router/table docs failures in the worktree are pre-existing and need DB env vars not set locally

Test plan

• Check the published post renders at /blog/tanstack-virtual-perf-and-ios in preview
• Verify the post shows up on the /blog index sorted by date
• Verify the OG image generates cleanly
• Light editorial pass on voice / tone if needed

Summary by CodeRabbit

• Documentation
  • Published a performance release announcement for TanStack Virtual covering faster cold mounts at scale, reduced resize and options overhead, and iOS Safari scrolling momentum fixes.
  • Described elimination of backward-scroll jank, introduced a scroll-restoration snapshot API with persistence examples, and included benchmark results, bundle delta notes, unit-test counts, planned next steps, and a cross-library benchmark mention.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d879f88b-26fd-48b9-a457-39ce05e19e4c

📥 Commits

Reviewing files that changed from the base of the PR and between b9e3d60 and 384b954.

📒 Files selected for processing (1)

• src/blog/tanstack-virtual-perf-and-ios.md

✅ Files skipped from review due to trivial changes (1)

• src/blog/tanstack-virtual-perf-and-ios.md

---

📝 Walkthrough

Walkthrough

Adds a new blog post announcing a TanStack Virtual performance release, describing runtime improvements, iOS Safari scrolling fixes, the new virtualizer.takeSnapshot() scroll-restoration API with example, benchmark results, and roadmap items.

Changes

TanStack Virtual Performance Release Announcement

Layer / File(s)	Summary
Complete release announcement blog post src/blog/tanstack-virtual-perf-and-ios.md	Full blog post covering performance improvements (measurement caching, faster cold mounts, reduced resize/setOptions overhead), iOS Safari momentum-scroll fix (deferred scrollTop writes), direction-gated backward-scroll jank elimination, new virtualizer.takeSnapshot() scroll restoration example, benchmark comparison table, bundle/test metrics, and remaining roadmap items.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 I hopped through lines of change and cheer,
Metrics brighter, scrolls more clear,
iOS bounces now behave,
Snapshots save the scroll we crave,
A tiny hop — performance near.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: adding a blog post announcing TanStack Virtual performance improvements and iOS handling.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch taren/blog/virtual-perf-and-ios

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/blog/tanstack-virtual-perf-and-ios.md`:
- Line 10: In the sentence containing the phrase "TanStack Virtual end to end"
replace "end to end" with the hyphenated compound "end-to-end" so the line reads
"I spent three days last week auditing TanStack Virtual end-to-end, ..." —
update the exact occurrence of that phrase in the file (search for "TanStack
Virtual end to end") to use the hyphenated form.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 070d3324-2bf4-4737-b92a-039e44adb741

📥 Commits

Reviewing files that changed from the base of the PR and between 73c6f64 and b9e3d60.

📒 Files selected for processing (1)

• src/blog/tanstack-virtual-perf-and-ios.md