docs(engine-plan): #7510 measured out; _tlv_get_addr is the top lever

[proggeramlug]

All three #7510 items are now answered by measurement. Items 1 and 2 shipped (#7535, #7525); item 3 collapsed on its own — layout_note_slot is 0.03% of churn_alloc (2 of 5,869 leaf samples), codegen emits zero js_gc_note_slot_layout sites for that workload, and a stub-it-entirely ceiling A/B is worth 1.016×. The type-propagation work (#7550/#7552) and declaration-at-allocation (#7501/#7532) removed the calls before anyone optimised them.

Next lever: _tlv_get_addr at 30.5% of churn_alloc — #7469's structural half. It grew as a share because everything around it shrank, not because it regressed.

Also records the campaign's most repeated failure mode, now three for three: a ticket's headline number was stale by the time it was worked (#7510 33.6% → 11%; layout_forget_object 14.5% → 3.0% → 1.7%; item 3 7.5% → 0.03%). Re-measure before scoping.

Docs only.

[coderabbitai]

Warning

Review limit reached

@proggeramlug, you've reached your PR review limit, so we couldn't start this review.

Next review available in: 6 minutes

You've used all free OSS reviews for now. Wait for the free limit to reset to keep reviewing this public repository.

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 14a647fc-5f4c-4441-b693-4e09db102cad

📥 Commits

Reviewing files that changed from the base of the PR and between 98033c0 and 6235c7f.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (4)

• CLAUDE.md
• Cargo.toml
• changelog.d/7560-plan-tls-lever.md
• docs/engine-plan.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/plan-tls-lever

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

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