chore(test): always report vitest worst import time offenders

[filmaj]

Description

Enables reporting the worst offenders in terms of import times when running tests. More details about this in the Profiling Test Performance Vitest guide.

The use of barrel files in this repository is the top contributor to long import times, but poor mocking in tests is also a factor.

Here is what this addition prints at the end of any vitest test runs (the following taken from this Node 26 on ubuntu CI run in this PR):

Test Files  245 passed (245)
      Tests  2585 passed | 7 skipped (2592)
   Start at  18:17:43
   Duration  63.16s (transform 16.05s, setup 956ms, import 128.57s, tests 16.27s, environment 18ms)

Import Duration Breakdown (Top 10)

Module                                               Self  Total
.../src/hooks/prerun/__tests__/warnings.test.ts     3.09s  3.26s  ████████████████████
...mmandNotFound/__tests__/topicAliases.test.ts     2.27s  2.90s  ██████████████████░░
...ests__/init/init.get-project-details.test.ts     115ms  2.49s  ███████████████░░░░░
.../__tests__/compareDependencyVersions.test.ts      25ms  1.92s  ████████████░░░░░░░░
 ↳ ...ty/cli/src/util/compareDependencyVersions.ts   15ms  1.90s  ████████████░░░░░░░░
 ↳ ...ty/cli-build/src/_exports/_internal/build.ts   63ms  1.88s  ████████████░░░░░░░░
 ↳ ...nity/cli-build/src/actions/build/buildApp.ts  139ms  1.77s  ███████████░░░░░░░░░
...ity/cli/src/commands/__tests__/login.test.ts      84ms  1.55s  █████████░░░░░░░░░░░
...src/actions/build/__tests__/buildApp.test.ts     168ms  1.51s  █████████░░░░░░░░░░░
...orker/__tests__/renderDocumentWorker.test.ts     180ms  1.49s  █████████░░░░░░░░░░░

Total imports: 2249
Slowest import (total-time): 3.26s
Total import time (self/total): 85.38s / 590.59s

---

Note

Low Risk
Config-only test tooling with no runtime or production impact.

Overview
Enables Vitest’s experimental importDurations in the root vitest.config.ts so every test run prints the top 10 slowest imports (self vs total time) plus aggregate import stats at the end of the run.

This is observability only—no change to which tests run, coverage, or reporters. It’s meant to surface heavy import chains (e.g. barrel files) and tests that pull in too much of the app without mocking.

^{Reviewed by Cursor Bugbot for commit 31aa7ce. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

📦 Bundle Stats — @sanity/cli

Compared against main (da1f49e0)

@sanity/cli

Metric	Value	vs main (da1f49e)
Internal (raw)	2.7 KB	-
Internal (gzip)	1.0 KB	-
Bundled (raw)	11.16 MB	-
Bundled (gzip)	2.10 MB	-
Import time	885ms	+13ms, +1.5%

bin:sanity

Metric	Value	vs main (da1f49e)
Internal (raw)	782 B	-
Internal (gzip)	423 B	-
Bundled (raw)	9.87 MB	-
Bundled (gzip)	1.78 MB	-
Import time	2.24s	-19ms, -0.8%

🗺️ View treemap · Artifacts

Details

• Import time regressions over 10% are flagged with ⚠️
• Sizes shown as raw / gzip 🗜️. Internal bytes = own code only. Total bytes = with all dependencies. Import time = Node.js cold-start median.

📦 Bundle Stats — @sanity/cli-core

Compared against main (da1f49e0)

Metric	Value	vs main (da1f49e)
Internal (raw)	106.7 KB	-
Internal (gzip)	26.7 KB	-
Bundled (raw)	21.72 MB	-
Bundled (gzip)	3.46 MB	-
Import time	781ms	+2ms, +0.3%

🗺️ View treemap · Artifacts

Details

• Import time regressions over 10% are flagged with ⚠️
• Sizes shown as raw / gzip 🗜️. Internal bytes = own code only. Total bytes = with all dependencies. Import time = Node.js cold-start median.

📦 Bundle Stats — create-sanity

Compared against main (da1f49e0)

Metric	Value	vs main (da1f49e)
Internal (raw)	908 B	-
Internal (gzip)	483 B	-
Bundled (raw)	931 B	-
Bundled (gzip)	491 B	-
Import time	❌ ChildProcess denied: node	-

Details

• Import time regressions over 10% are flagged with ⚠️
• Sizes shown as raw / gzip 🗜️. Internal bytes = own code only. Total bytes = with all dependencies. Import time = Node.js cold-start median.

[github-actions]

Coverage Delta

No covered files changed in this PR.

Overall Coverage

Metric	Coverage
Statements	73.5% (±0%)
Branches	63.6% (±0%)
Functions	67.2% (- 0.0%)
Lines	74.1% (±0%)