[release] v1.7.0

[atomiks]

Preview: https://deploy-preview-5404--base-ui.netlify.app/react/overview/releases

Changes

• Bump @base-ui/react to 1.7.0 and @base-ui/utils to 0.3.2.
• Add the v1.7.0 changelog and release documentation.

Performance benchmark

(This should be done via /benchmark on release PRs in the future)

Compared fresh builds of v1.6.0 (b34551d64) and master (7cc0eef3a) using the full Chromium benchmark suite. After discarded warm-ups, two runs per revision were measured in ABBA order. Values are the mean React duration across both runs; lower is better.

Benchmark	v1.6.0	1.7.0 (master)	Change	Renders
Slider mount	34.63 ms	20.11 ms	−41.9%	3 → 2
Tabs mount	43.72 ms	33.75 ms	−22.8%	4 → 3
Combobox narrow typing	9.28 ms	7.60 ms	−18.1%	17 → 15
Select open	10.66 ms	9.10 ms	−14.6%	14
Combobox typing	7.79 ms	6.69 ms	−14.1%	11
Select mount	27.15 ms	23.43 ms	−13.7%	3
Mixed surface mount	18.44 ms	16.67 ms	−9.6%	5
Menu open	18.64 ms	17.12 ms	−8.2%	12
Popover mount	16.38 ms	15.13 ms	−7.6%	1
Dialog mount	12.49 ms	12.03 ms	−3.6%	1
Menu mount	23.38 ms	22.69 ms	−2.9%	2
Tooltip mount	13.09 ms	12.86 ms	−1.8%	1
Scroll Area mount	21.12 ms	21.12 ms	0.0%	3
Checkbox mount	17.47 ms	17.96 ms	+2.8%	1

Across the 14 shared benchmarks, master was 12.0% faster by geometric mean. No shared benchmark regressed by more than 5%, and paint time improved or remained neutral in every case.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@5404
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@5404
  

commit: d00fb6a

[code-infra-dashboard]

Bundle size

Bundle	Parsed size	Gzip size
@base-ui/react	0B(0.00%)	0B(0.00%)

Details of bundle changes

Performance

Total duration: 1,256.25 ms +62.81 ms^(+5.3%) | Renders: 78 ⁽⁺⁰⁾ | Paint: 1,976.73 ms +76.98 ms^(+4.1%)

Test	Duration	Renders
Slider mount (300 instances)	132.13 ms 🔺+29.91 ms(+29.3%)	2 (+0)
Select mount (200 instances)	151.42 ms 🔺+26.16 ms(+20.9%)	3 (+0)
Combobox type — 500 items, narrows to ~11 (type "Row 25")	40.27 ms ▼-13.77 ms(-25.5%)	15 (+0)

12 tests within noise — details

Metric alarms

Test	Metric	Change
Slider mount (300 instances)	bench:paint	🔺 +48.13 ms

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Check out the code infra dashboard for more information about this PR.

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