[code-infra] Port codebase to use tsgo by brijeshb42 · Pull Request #22826 · mui/mui-x

brijeshb42 · 2026-06-16T07:44:01Z

Ports the codebase to use tsgo for type checking.

CI typecheck speedup

Measured on the test_types CircleCI job, step "Tests TypeScript definitions":

Branch	Typecheck time
This PR (tsgo)	~55s
master (typical)	~180–195s

Roughly 3.5× faster typechecks on CI (up to ~5× vs. slower master runs).

CI credit cost

This PR bumps test_types to xlarge.gen2 (48 credits/min); master runs on large.gen2 (24 credits/min). CircleCI bills per-second on whole-job wall-clock.

	Resource	Wall-clock	Credits
master	large.gen2 (24/min)	~260s	~104
This PR (tsgo)	xlarge.gen2 (48/min)	~105s	~84
Saved per run	—	~155s	~20 (~19%)

Faster end-to-end (~2.5×) and still ~19% cheaper per run despite the larger box.

Verified via emitted .d.ts diff (master vs branch), both tsc and tsgo — outputs identical to each other. None are breaking. None require user action.

Only 2 changes alter the shipped .d.ts at all, both in internal surfaces and both type-compatible.

I have followed (at least) the PR section of the contributing guide.

code-infra-dashboard · 2026-06-16T07:48:09Z

Deploy preview

https://deploy-preview-22826--material-ui-x.netlify.app/

Bundle size

Bundle	Parsed size	Gzip size
@mui/x-data-grid	0B^(0.00%)	0B^(0.00%)
@mui/x-data-grid-pro	0B^(0.00%)	0B^(0.00%)
@mui/x-data-grid-premium	0B^(0.00%)	0B^(0.00%)
@mui/x-charts	0B^(0.00%)	0B^(0.00%)
@mui/x-charts-pro	0B^(0.00%)	0B^(0.00%)
@mui/x-charts-premium	0B^(0.00%)	0B^(0.00%)
@mui/x-date-pickers	0B^(0.00%)	0B^(0.00%)
@mui/x-date-pickers-pro	0B^(0.00%)	0B^(0.00%)
@mui/x-tree-view	0B^(0.00%)	0B^(0.00%)
@mui/x-tree-view-pro	0B^(0.00%)	0B^(0.00%)
@mui/x-scheduler	0B^(0.00%)	0B^(0.00%)
@mui/x-scheduler-premium	0B^(0.00%)	0B^(0.00%)
@mui/x-chat	0B^(0.00%)	0B^(0.00%)
@mui/x-license	0B^(0.00%)	0B^(0.00%)

Details of bundle changes

Performance

Total duration: 1,473.40 ms -85.89 ms^(-5.5%) | Renders: 63 ⁽⁺⁰⁾

Test	Duration	Renders
RadialBarChart stacked with multiple series	33.09 ms 🔺+13.56 ms^(+69.4%)	2 ⁽⁺⁰⁾
LineChart with date axis and big data amount	36.69 ms ▼-16.26 ms^(-30.7%)	2 ⁽⁺⁰⁾
RadialLineChart with big data amount	43.49 ms ▼-13.92 ms^(-24.2%)	2 ⁽⁺⁰⁾
ScatterChartPro with big data amount and zoomed in (batch renderer)	27.32 ms ▼-9.95 ms^(-26.7%)	2 ⁽⁺⁰⁾
ScatterChartPro with big data amount (single renderer)	14.04 ms ▼-5.28 ms^(-27.3%)	2 ⁽⁺⁰⁾

…and 1 more (+20 within noise) — details

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

brijeshb42 · 2026-06-16T08:10:22Z

 minimumReleaseAgeExclude:
  - '@mui/*'
  - '@base-ui/*'
+  - '@typescript/native-preview*'


Temporary change.

github-actions · 2026-06-16T19:54:12Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

github-actions · 2026-06-22T13:58:54Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

JCQuintas · 2026-06-23T13:02:15Z

+.vscode/*
+!.vscode/settings.json
+!.vscode/extensions.json


This is probably not a good idea. Just tell ppl to install/enable the extension/settings for the time being, else it will conflict with everyone's local settings

But then how do we share common settings for the repo. Currently, we are enabling this and it should automatically get enabled for everyone when they pull. Then after few months, we'll need to revisit this again to cleanup
Informing on Slack seems tedious since there's also the requirement of installing the extension.
For users, workspace settings is there (as well as user settings) where they can customize. We are doing the same in base-ui and core.

🤷 we can go with it, it will just break stuff for everyone that uses vscode.

It is vscode's fault it doesn't have a proper way of handling it instead of just creating a custom workspace around a single project 🫠

The settings can still be moved to user settings instead of the repo settings. Right ?

Janpot

lgtm, if it has the blessing of X for the source changes

github-actions · 2026-06-24T11:11:19Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

github-actions · 2026-06-30T13:00:52Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

github-actions · 2026-07-06T10:03:08Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

github-actions · 2026-07-07T08:38:42Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

brijeshb42 · 2026-07-08T14:24:31Z

It'd be great to get a +1 here since this is the only repo not migrated yet.

github-actions · 2026-07-08T15:25:57Z

This pull request has conflicts, please resolve those before we can evaluate the pull request.

LukasTy

A few risky configs, but looks good overall. 👍
Let's ship those speed gains. 🚀

brijeshb42 force-pushed the tsgo branch from 94f4f00 to 24988d8 Compare June 16, 2026 08:09

brijeshb42 commented Jun 16, 2026

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brijeshb42 force-pushed the tsgo branch 3 times, most recently from 70baa71 to cee441c Compare June 16, 2026 17:04

github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 16, 2026

brijeshb42 force-pushed the tsgo branch from cee441c to e8e47df Compare June 17, 2026 03:35

github-actions Bot removed the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 17, 2026

brijeshb42 force-pushed the tsgo branch 3 times, most recently from a429301 to 0b8b4be Compare June 19, 2026 13:48

github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 22, 2026

brijeshb42 force-pushed the tsgo branch from 0b8b4be to 019baed Compare June 22, 2026 14:33

github-actions Bot removed the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 22, 2026

brijeshb42 force-pushed the tsgo branch from 019baed to be17d99 Compare June 23, 2026 04:37

brijeshb42 requested a review from a team June 23, 2026 05:34

brijeshb42 marked this pull request as ready for review June 23, 2026 05:34

brijeshb42 requested review from JCQuintas, alexfauquette and romgrk as code owners June 23, 2026 05:34

brijeshb42 force-pushed the tsgo branch from f864bfe to 24d2dbb Compare June 23, 2026 06:19

JCQuintas reviewed Jun 23, 2026

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Janpot approved these changes Jun 23, 2026

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github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 24, 2026

brijeshb42 force-pushed the tsgo branch from d42537b to c3ff75c Compare June 25, 2026 11:43

github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jun 30, 2026

brijeshb42 force-pushed the tsgo branch from c3ff75c to 642a8c8 Compare July 6, 2026 09:50

github-actions Bot added PR: out-of-date The pull request has merge conflicts and can't be merged. and removed PR: out-of-date The pull request has merge conflicts and can't be merged. labels Jul 6, 2026

brijeshb42 force-pushed the tsgo branch from 642a8c8 to 2326614 Compare July 6, 2026 12:06

github-actions Bot removed the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jul 6, 2026

brijeshb42 requested a review from JCQuintas July 6, 2026 12:28

brijeshb42 force-pushed the tsgo branch from 2326614 to 156bc3f Compare July 6, 2026 12:29

github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jul 7, 2026

brijeshb42 force-pushed the tsgo branch from 156bc3f to ae9668e Compare July 8, 2026 14:23

github-actions Bot removed the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jul 8, 2026

Janpot requested a review from LukasTy July 8, 2026 15:18

github-actions Bot added the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jul 8, 2026

LukasTy approved these changes Jul 8, 2026

View reviewed changes

brijeshb42 added 5 commits July 9, 2026 22:34

Port codebase to use tsgo

1200980

Fix typechecks

dea4fbc

Update vscode settings

61eddc4

Trigger CI

094fb20

Fix merge conflicts

c37eae7

brijeshb42 force-pushed the tsgo branch from ae9668e to c37eae7 Compare July 9, 2026 17:06

github-actions Bot removed the PR: out-of-date The pull request has merge conflicts and can't be merged. label Jul 9, 2026

brijeshb42 merged commit 62fd3df into mui:master Jul 10, 2026
22 checks passed

brijeshb42 deleted the tsgo branch July 10, 2026 03:34

LukasTy mentioned this pull request Jul 13, 2026

[code-infra] Reduce release:build concurrency to mitigate tsgo OOM kills #23139

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CI typecheck speedup

CI credit cost

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brijeshb42 commented Jun 16, 2026 •

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