Update DOM types by jakebailey · Pull Request #65487 · microsoft/TypeScript

Jake Bailey (jakebailey) · 2026-11-13T19:06:09Z

This pulls in the latest DOM types.

Speech recognition: Adds SpeechRecognition, SpeechRecognitionPhrase, speech grammar interfaces, and local recognition availability and installation APIs.
IndexedDB and service workers: Adds IDBIndex.getAllRecords(), IDBObjectStore.getAllRecords(), and service worker static routing via InstallEvent.addRoutes().
WebTransport: Adds send groups, writable datagrams, response headers, a draining promise, and stream and datagram options.
HTML and accessibility: Adds Document.parseHTML(), ShadowRoot.setHTML(), ariaNotify(), HTMLSelectedContentElement, a typed XHTML createElementNS() overload, and CommandEvent types for command handlers.
Graphics and performance: Adds WebGL extensions, WebGPU compilation hints and additional options, typed performance-entry overloads, and service worker resource-timing properties.
Other additions: ReadableStream.from(), generic return types for Scheduler.postTask(), SVG hyperlink properties, and additional CSS properties.
Potential compatibility changes: MutationObserver.observe() now requires its options argument; ViewTimeline requires an options object with a subject; speech recognition result item() methods can return null; and RTCRtpEncodingParameters.totalEncodedBytesTarget is removed.

Jake Bailey (jakebailey) · 2026-11-13T19:06:40Z

TypeScript Bot (@typescript-bot) test it

typescript-automation · 2026-11-13T19:06:46Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`test top400`	✅ Started	👀 Results
`user test this`	✅ Started	✅ Results
`run dt`	✅ Started	👀 Results
`perf test this faster`	✅ Started	👀 Results

Copilot

🔵 Needs a closer look

Install-event callbacks do not expose addRoutes, and both getAllRecords() declarations lose the known IDBRecord[] result type by returning unparameterized IDBRequest.

No open issues 🎉

What changed in this PR

Updates the native TypeScript compiler’s bundled web-platform declarations and adjusts affected compiler baselines.

Changes:

Adds worker API declarations for service-worker routing, IndexedDB records, WebTransport, and graphics features.
Refines existing API types and refreshes documentation comments.
Updates baselines to reflect new global names and DOM members.

File	Description
`tsc/testdata/baselines/reference/conformance/globalThisBlockscopedProperties.types`	Records newly available global API names.
`tsc/testdata/baselines/reference/compiler/mappedTypeRecursiveInference.errors.txt`	Includes `ariaNotify` in the expanded DOM diagnostic.
`tsc/internal/bundled/libs/lib.webworker.d.ts`	Refreshes worker API declarations and documentation.

_{Review effort: Balanced}

typescript-automation · 2026-11-13T19:31:28Z

Hey Jake Bailey (@jakebailey), the results of running the DT tests are ready.

There were interesting changes:

Branch only errors: dom-speech-recognition

Package: dom-speech-recognition

Branch error:

Project scope: tsconfig.json

Error: types/dom-speech-recognition/index.d.ts:63:5
TypeScript@local compile error TS2687:
All declarations of 'processLocally' must have identical modifiers.

types/dom-speech-recognition/index.d.ts:63:5
TypeScript@local compile error TS2717:
Subsequent property declarations must have the same type.  Property 'processLocally' must be of type 'boolean | undefined', but here has type 'boolean'.

types/dom-speech-recognition/index.d.ts:142:5
TypeScript@local compile error TS2374:
Duplicate index signature for type 'number'.

types/dom-speech-recognition/dom-speech-recognition-tests.ts:24:7
TypeScript@local compile error TS2741:
Property '[Symbol.iterator]' is missing in type '{ length: number; addFromString: (string: string, weight?: number) => undefined; addFromURI: (src: string, weight?: number) => undefined; item: (index: number) => SpeechGrammar; }' but required in type 'SpeechGrammarList'.

types/dom-speech-recognition/dom-speech-recognition-tests.ts:33:7
TypeScript@local compile error TS2739:
Type '{ continuous: true; grammars: SpeechGrammarList; interimResults: false; lang: string; maxAlternatives: number; processLocally: true; onaudioend: null; onaudiostart: null; onend: null; onerror: null; onnomatch: null; ... 11 more ...; removeEventListener: (type: string, listener: EventListenerOrEventListenerObject, op...' is missing the following properties from type 'SpeechRecognition': phrases, unspokenPunctuation

types/dom-speech-recognition/dom-speech-recognition-tests.ts:70:5
TypeScript@local compile error TS2322:
Type '(audioTrack: MediaStreamTrack) => undefined' is not assignable to type '{ (): void; (audioTrack: MediaStreamTrack): void; (audioTrack?: MediaStreamTrack | undefined): void; }'.
  Target signature provides too few arguments. Expected 1 or more, but got 0.
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Branch only errors: node

Package: node

Branch error:

Project scope: tsconfig.dom.json, tsconfig.non-dom.json, tsconfig.webworker.json

Error: types/node/node-tests/perf_hooks.ts:115:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark

types/node/node-tests/perf_hooks.ts:117:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Branch only errors: node/v22

Package: node/v22

Branch error:

Project scope: tsconfig.dom.json, tsconfig.non-dom.json, tsconfig.webworker.json

Error: types/node/v22/test/perf_hooks.ts:115:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark

types/node/v22/test/perf_hooks.ts:117:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Branch only errors: node/v24

Package: node/v24

Branch error:

Project scope: tsconfig.dom.json, tsconfig.non-dom.json, tsconfig.webworker.json

Error: types/node/v24/test/perf_hooks.ts:115:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark

types/node/v24/test/perf_hooks.ts:117:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Branch only errors: node/v25

Package: node/v25

Branch error:

Project scope: tsconfig.dom.json, tsconfig.non-dom.json, tsconfig.webworker.json

Error: types/node/v25/node-tests/perf_hooks.ts:115:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark

types/node/v25/node-tests/perf_hooks.ts:117:1
TypeScript@local tsconfig.dom.json, local tsconfig.webworker.json expected type to be:
  PerformanceEntry
got:
  PerformanceMark
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Branch only errors: dom-webcodecs

Package: dom-webcodecs

Branch error:

Project scope: tsconfig.json

Error: types/dom-webcodecs/webcodecs.generated.d.ts:16:5
TypeScript@local compile error TS2717:
Subsequent property declarations must have the same type.  Property 'data' must be of type 'AllowSharedBufferSource', but here has type 'BufferSource'.
    at combineErrorsAndWarnings (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:200:28)
    at runTests (/mnt/vss/_work/1/s/DefinitelyTyped-tools/packages/dtslint/dist/index.js:192:20)

Full output in the log.

typescript-automation · 2026-11-13T19:51:25Z

Jake Bailey (@jakebailey) Here are the results of running the user tests with tsc comparing baseline and pr:

Everything looks good!

typescript-automation · 2026-11-13T20:01:56Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_88,466	_88,466	_~	_~	_~	_{p=1.000 n=40}
_Types	_79,606	_79,606	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{106,419k (± 0.02%)}	_{106,392k (± 0.02%)}	_~	_106,238k	_106,548k	_{p=0.060 n=40}
_{Memory Allocs}	_{1,261,932 (± 0.00%)}	_{1,261,922 (± 0.01%)}	_~	_1,261,054	_1,262,399	_{p=0.599 n=40}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Parse Time}	_{0.022s (± 1.35%)}	_{0.022s (± 2.13%)}	_~	_0.018s	_0.027s	_{p=0.702 n=40}
_{Bind Time}	_{0.009s (± 6.29%)}	_{0.009s (± 3.28%)}	_~	_0.007s	_0.011s	_{p=0.618 n=40}
_{Check Time}	_{0.209s (± 1.40%)}	_{0.211s (± 1.61%)}	_~	_0.189s	_0.240s	_{p=0.143 n=40}
_{Emit Time}	_{0.138s (± 1.83%)}	_{0.138s (± 1.99%)}	_~	_0.122s	_0.155s	_{p=0.392 n=40}
_{Total Time}	_{0.381s (± 1.43%)}	_{0.384s (± 1.55%)}	_~	_0.345s	_0.432s	_{p=0.244 n=40}
_{angular-1 - native}
_Errors	₆₃	₆₃	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_756,637	_754,420	_{-2,217 (- 0.29%)}	_~	_~	_{p=0.000 n=40}
_Types	_549,423	_547,690	_{-1,733 (- 0.32%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{643,847k (± 0.01%)}	_{642,933k (± 0.01%)}	_{-899k (- 0.14%)}	_642,352k	_643,395k	_{p=0.000 n=40}
_{Memory Allocs}	_{9,555,714 (± 0.06%)}	_{9,540,918 (± 0.03%)}	_{-13,548 (- 0.14%)}	_9,536,005	_9,584,617	_{p=0.000 n=40}
_{Config Time}	_{0.007s (± 2.29%)}	_{0.007s (± 2.23%)}	_{🔻+0.000s (+ 6.90%)}	_0.006s	_0.008s	_{p=0.017 n=40}
_{Parse Time}	_{0.127s (± 3.47%)}	_{0.125s (± 3.64%)}	_~	_0.105s	_0.181s	_{p=0.468 n=40}
_{Bind Time}	_{0.044s (± 6.50%)}	_{0.045s (± 7.40%)}	_~	_0.034s	_0.068s	_{p=0.759 n=40}
_{Check Time}	_{0.646s (± 0.87%)}	_{0.663s (± 1.25%)}	_{+0.015s (+ 2.36%)}	_0.601s	_0.736s	_{p=0.002 n=40}
_{Emit Time}	_{0.402s (± 0.79%)}	_{0.408s (± 1.05%)}	_{+0.005s (+ 1.20%)}	_0.377s	_0.444s	_{p=0.035 n=40}
_{Total Time}	_{1.241s (± 0.78%)}	_{1.261s (± 0.93%)}	_{+0.018s (+ 1.47%)}	_1.159s	_1.337s	_{p=0.001 n=40}
_{arktype - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_686,116	_686,116	_~	_~	_~	_{p=1.000 n=40}
_Types	_939,781	_939,781	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{475,948k (± 0.01%)}	_{475,958k (± 0.01%)}	_~	_475,740k	_476,237k	_{p=0.826 n=40}
_{Memory Allocs}	_{12,064,021 (± 0.01%)}	_{12,063,917 (± 0.01%)}	_~	_12,060,287	_12,084,303	_{p=0.485 n=40}
_{Config Time}	_{0.001s (± 9.03%)}	_{0.001s (± 0.77%)}	_~	_0.001s	_0.001s	_{p=1.000 n=40}
_{Parse Time}	_{0.041s (± 3.17%)}	_{0.040s (± 2.64%)}	_~	_0.035s	_0.047s	_{p=0.330 n=40}
_{Bind Time}	_{0.014s (± 7.73%)}	_{0.014s (± 6.76%)}	_~	_0.011s	_0.020s	_{p=0.876 n=40}
_{Check Time}	_{0.865s (± 0.90%)}	_{0.861s (± 1.00%)}	_~	_0.800s	_0.917s	_{p=0.765 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{0.949s (± 0.82%)}	_{0.943s (± 0.88%)}	_~	_0.888s	_0.997s	_{p=0.656 n=40}
_{class-transformer - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_45,376	_45,376	_~	_~	_~	_{p=1.000 n=40}
_Types	_7,573	_7,573	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{27,746k (± 0.02%)}	_{27,747k (± 0.02%)}	_~	_27,712k	_27,784k	_{p=0.994 n=40}
_{Memory Allocs}	_{248,535 (± 0.02%)}	_{248,588 (± 0.04%)}	_~	_248,035	_249,604	_{p=0.485 n=40}
_{Config Time}	_{0.001s (± 9.65%)}	_{0.001s (±12.44%)}	_~	_0.000s	_0.001s	_{p=0.525 n=40}
_{Parse Time}	_{0.011s (± 2.49%)}	_{0.012s (± 3.14%)}	_~	_0.009s	_0.016s	_{p=0.763 n=40}
_{Bind Time}	_{0.003s (± 7.25%)}	_{0.003s (± 6.43%)}	_~	_0.002s	_0.005s	_{p=0.431 n=40}
_{Check Time}	_{0.008s (± 3.63%)}	_{0.008s (± 4.07%)}	_~	_0.006s	_0.010s	_{p=0.381 n=40}
_{Emit Time}	_{0.008s (± 4.76%)}	_{0.008s (± 4.55%)}	_~	_0.006s	_0.010s	_{p=0.227 n=40}
_{Total Time}	_{0.032s (± 1.56%)}	_{0.032s (± 1.97%)}	_~	_0.027s	_0.037s	_{p=0.524 n=40}
_{effect - native}
_Errors	₁₂	₁₂	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_1,235,134	_1,273,279	_{+38,145 (+ 3.09%)}	_~	_~	_{p=0.000 n=40}
_Types	_893,420	_914,106	_{+20,686 (+ 2.32%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{941,340k (± 0.01%)}	_{954,940k (± 0.01%)}	_{+13,610k (+ 1.45%)}	_954,120k	_956,118k	_{p=0.000 n=40}
_{Memory Allocs}	_{12,628,973 (± 0.03%)}	_{12,807,229 (± 0.05%)}	_{+175,269 (+ 1.39%)}	_12,790,835	_12,898,426	_{p=0.000 n=40}
_{Config Time}	_0.002s	_0.002s	_~	_~	_~	_{p=1.000 n=40}
_{Parse Time}	_{0.149s (± 3.46%)}	_{0.148s (± 1.56%)}	_~	_0.134s	_0.175s	_{p=0.963 n=40}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Check Time}	_{0.871s (± 0.87%)}	_{0.977s (± 0.69%)}	_{🔻+0.104s (+11.99%)}	_0.924s	_1.030s	_{p=0.000 n=40}
_{Emit Time}	_{0.482s (± 1.16%)}	_{0.471s (± 1.13%)}	_{-0.011s (- 2.29%)}	_0.422s	_0.505s	_{p=0.007 n=40}
_{Total Time}	_{1.600s (± 0.65%)}	_{1.692s (± 0.58%)}	_{🔻+0.091s (+ 5.68%)}	_1.611s	_1.755s	_{p=0.000 n=40}
_{mui-docs - native}
_Errors	_11,405	_11,405	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_3,782,394	_3,729,648	_{-52,746 (- 1.39%)}	_~	_~	_{p=0.000 n=40}
_Types	_1,355,774	_1,342,479	_{-13,295 (- 0.98%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{1,678,441k (± 0.05%)}	_{1,672,231k (± 0.05%)}	_{-6,266k (- 0.37%)}	_1,666,538k	_1,678,201k	_{p=0.000 n=40}
_{Memory Allocs}	_{25,591,916 (± 0.04%)}	_{25,675,831 (± 0.07%)}	_{+78,873 (+ 0.31%)}	_25,595,427	_25,880,538	_{p=0.000 n=40}
_{Config Time}	_{0.006s (± 0.80%)}	_{0.006s (± 0.07%)}	_~	_0.006s	_0.006s	_{p=1.000 n=40}
_{Parse Time}	_{0.266s (± 1.24%)}	_{0.268s (± 1.86%)}	_~	_0.231s	_0.336s	_{p=0.590 n=40}
_{Bind Time}	_{0.001s (±13.09%)}	_{0.001s (± 1.13%)}	_~	_0.001s	_0.001s	_{p=1.000 n=40}
_{Check Time}	_{2.794s (± 0.53%)}	_{2.871s (± 0.67%)}	_{+0.077s (+ 2.76%)}	_2.775s	_3.049s	_{p=0.000 n=40}
_{Emit Time}	_{0.239s (± 0.99%)}	_{0.239s (± 0.94%)}	_~	_0.225s	_0.256s	_{p=0.670 n=40}
_{Total Time}	_{3.772s (± 0.50%)}	_{3.856s (± 0.58%)}	_{+0.083s (+ 2.20%)}	_3.739s	_4.088s	_{p=0.000 n=40}
_{sentry - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_4,793,266	_4,700,253	_{-93,013 (- 1.94%)}	_~	_~	_{p=0.000 n=40}
_Types	_2,607,044	_2,550,782	_{-56,262 (- 2.16%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{2,798,591k (± 0.02%)}	_{2,745,055k (± 0.02%)}	_{-53,500k (- 1.91%)}	_2,741,915k	_2,753,277k	_{p=0.000 n=40}
_{Memory Allocs}	_{74,652,730 (± 0.04%)}	_{71,766,345 (± 0.05%)}	_{🟩-2,882,762 (- 3.86%)}	_71,495,043	_71,994,710	_{p=0.000 n=40}
_{Config Time}	_{0.018s (± 2.26%)}	_{0.018s (± 2.14%)}	_~	_0.017s	_0.024s	_{p=0.843 n=40}
_{Parse Time}	_{0.471s (± 3.05%)}	_{0.481s (± 3.54%)}	_~	_0.410s	_0.634s	_{p=0.510 n=40}
_{Bind Time}	_{0.152s (± 6.91%)}	_{0.153s (± 6.44%)}	_~	_0.115s	_0.230s	_{p=0.778 n=40}
_{Check Time}	_{6.731s (± 0.52%)}	_{6.668s (± 0.65%)}	_{-0.066s (- 0.99%)}	_6.405s	_7.063s	_{p=0.001 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{7.423s (± 0.54%)}	_{7.373s (± 0.72%)}	_{-0.063s (- 0.84%)}	_7.097s	_7.851s	_{p=0.008 n=40}
_{social-app - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_1,883,060	_1,877,956	_{-5,104 (- 0.27%)}	_~	_~	_{p=0.000 n=40}
_Types	_1,158,079	_1,176,153	_{+18,074 (+ 1.56%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{952,242k (± 0.01%)}	_{957,650k (± 0.01%)}	_{+5,367k (+ 0.56%)}	_956,845k	_959,138k	_{p=0.000 n=40}
_{Memory Allocs}	_{13,448,867 (± 0.13%)}	_{13,495,391 (± 0.09%)}	_{+52,280 (+ 0.39%)}	_13,444,351	_13,596,879	_{p=0.000 n=40}
_{Config Time}	_{0.006s (± 3.80%)}	_{0.006s (± 5.21%)}	_~	_0.005s	_0.011s	_{p=0.718 n=40}
_{Parse Time}	_{0.157s (± 1.88%)}	_{0.160s (± 3.29%)}	_~	_0.139s	_0.236s	_{p=0.845 n=40}
_{Bind Time}	_{0.046s (± 7.70%)}	_{0.042s (± 5.46%)}	_~	_0.033s	_0.062s	_{p=0.134 n=40}
_{Check Time}	_{1.428s (± 0.81%)}	_{1.394s (± 0.73%)}	_{-0.031s (- 2.16%)}	_1.340s	_1.469s	_{p=0.000 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{1.655s (± 0.75%)}	_{1.622s (± 0.78%)}	_{-0.034s (- 2.08%)}	_1.565s	_1.768s	_{p=0.000 n=40}
_{strada-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_1,184,972	_1,184,972	_~	_~	_~	_{p=1.000 n=40}
_Types	_438,812	_438,812	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{1,161,078k (± 0.29%)}	_{1,159,734k (± 0.27%)}	_~	_1,140,204k	_1,179,633k	_{p=0.510 n=40}
_{Memory Allocs}	_{47,892,651 (± 0.09%)}	_{47,891,591 (± 0.08%)}	_~	_47,663,656	_48,157,124	_{p=0.952 n=40}
_{Config Time}	_{0.002s (±12.75%)}	_{0.002s (±11.60%)}	_~	_0.000s	_0.003s	_{p=0.167 n=40}
_{Parse Time}	_{0.135s (± 1.48%)}	_{0.136s (± 1.17%)}	_~	_0.123s	_0.145s	_{p=0.674 n=40}
_{Bind Time}	_{0.000s (±196.00%)}	_{0.000s (±196.00%)}	_~	_0.000s	_0.001s	_{p=1.000 n=40}
_{Check Time}	_{0.804s (± 0.76%)}	_{0.808s (± 0.84%)}	_~	_0.762s	_0.863s	_{p=0.147 n=40}
_{Emit Time}	_{0.140s (± 1.68%)}	_{0.140s (± 1.51%)}	_~	_0.125s	_0.156s	_{p=0.863 n=40}
_{Total Time}	_{9.385s (± 0.83%)}	_{9.413s (± 0.83%)}	_~	_8.875s	_10.071s	_{p=0.320 n=40}
_{strada-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_263,481	_263,481	_~	_~	_~	_{p=1.000 n=40}
_Types	_196,095	_196,095	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{221,526k (± 0.01%)}	_{221,504k (± 0.02%)}	_~	_221,234k	_221,758k	_{p=0.265 n=40}
_{Memory Allocs}	_{2,412,258 (± 0.01%)}	_{2,412,259 (± 0.01%)}	_~	_2,410,656	_2,413,785	_{p=0.765 n=40}
_{Config Time}	_0.000s	_{0.000s (±196.00%)}	_~	_0.000s	_0.001s	_{p=0.330 n=40}
_{Parse Time}	_{0.049s (± 2.63%)}	_{0.048s (± 2.28%)}	_~	_0.042s	_0.058s	_{p=0.863 n=40}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Check Time}	_{0.372s (± 0.89%)}	_{0.374s (± 0.88%)}	_~	_0.353s	_0.404s	_{p=0.295 n=40}
_{Emit Time}	_{0.050s (± 4.72%)}	_{0.047s (± 3.49%)}	_~	_0.042s	_0.058s	_{p=0.064 n=40}
_{Total Time}	_{0.498s (± 1.06%)}	_{0.497s (± 0.86%)}	_~	_0.468s	_0.530s	_{p=0.905 n=40}
_{t3code-server - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_4,349,937	_4,349,937	_~	_~	_~	_{p=1.000 n=40}
_Types	_3,042,462	_3,042,462	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{2,394,605k (± 0.02%)}	_{2,394,877k (± 0.02%)}	_~	_2,392,661k	_2,398,887k	_{p=0.405 n=40}
_{Memory Allocs}	_{37,084,138 (± 0.06%)}	_{37,067,606 (± 0.03%)}	_~	_37,005,252	_37,189,998	_{p=0.320 n=40}
_{Config Time}	_{0.003s (± 7.95%)}	_{0.003s (± 8.17%)}	_~	_0.002s	_0.006s	_{p=0.977 n=40}
_{Parse Time}	_{0.247s (± 1.89%)}	_{0.249s (± 1.71%)}	_~	_0.213s	_0.278s	_{p=0.489 n=40}
_{Bind Time}	_{0.093s (± 6.77%)}	_{0.089s (± 6.35%)}	_~	_0.074s	_0.141s	_{p=0.316 n=40}
_{Check Time}	_{5.923s (± 0.70%)}	_{5.957s (± 0.92%)}	_~	_5.705s	_6.553s	_{p=0.460 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{6.278s (± 0.66%)}	_{6.309s (± 0.88%)}	_~	_6.042s	_6.889s	_{p=0.590 n=40}
_{tanstack-router - native}
_Errors	₁	₁	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_570,149	_579,591	_{+9,442 (+ 1.66%)}	_~	_~	_{p=0.000 n=40}
_Types	_396,548	_410,082	_{+13,534 (+ 3.41%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{315,260k (± 0.01%)}	_{321,594k (± 0.01%)}	_{+6,335k (+ 2.01%)}	_321,185k	_321,836k	_{p=0.000 n=40}
_{Memory Allocs}	_{4,333,836 (± 0.07%)}	_{4,404,690 (± 0.10%)}	_{+69,248 (+ 1.60%)}	_4,390,881	_4,461,772	_{p=0.000 n=40}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=40}
_{Parse Time}	_{0.040s (± 2.85%)}	_{0.039s (± 2.20%)}	_~	_0.034s	_0.044s	_{p=0.415 n=40}
_{Bind Time}	_{0.012s (± 7.56%)}	_{0.012s (± 7.54%)}	_~	_0.010s	_0.022s	_{p=0.857 n=40}
_{Check Time}	_{0.454s (± 1.04%)}	_{0.503s (± 0.51%)}	_{🔻+0.051s (+11.33%)}	_0.488s	_0.526s	_{p=0.000 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{0.525s (± 1.08%)}	_{0.574s (± 0.51%)}	_{🔻+0.053s (+10.07%)}	_0.553s	_0.591s	_{p=0.000 n=40}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_231,607	_231,607	_~	_~	_~	_{p=1.000 n=40}
_Types	_181,149	_181,149	_~	_~	_~	_{p=1.000 n=40}
_{Memory Used}	_{190,852k (± 0.01%)}	_{190,858k (± 0.01%)}	_~	_190,720k	_190,990k	_{p=0.972 n=40}
_{Memory Allocs}	_{1,310,060 (± 0.01%)}	_{1,310,153 (± 0.01%)}	_~	_1,309,238	_1,311,047	_{p=0.405 n=40}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Parse Time}	_{0.042s (± 2.15%)}	_{0.042s (± 2.26%)}	_~	_0.037s	_0.048s	_{p=0.528 n=40}
_{Bind Time}	_{0.019s (± 3.20%)}	_{0.020s (± 3.46%)}	_~	_0.017s	_0.027s	_{p=0.088 n=40}
_{Check Time}	_{0.291s (± 0.66%)}	_{0.289s (± 0.57%)}	_~	_0.280s	_0.299s	_{p=0.244 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{0.359s (± 0.53%)}	_{0.359s (± 0.47%)}	_~	_0.346s	_0.373s	_{p=0.882 n=40}
_{vscode - native}
_Errors	₀	₁	_{🔻NaN (+ ∞%)}	_~	_~	_{p=0.000 n=40}
_Symbols	_8,402,829	_8,403,657	_{+828 (+ 0.01%)}	_~	_~	_{p=0.000 n=40}
_Types	_4,890,731	_4,891,251	_{+520 (+ 0.01%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{5,598,642k (± 0.01%)}	_{5,598,797k (± 0.01%)}	_~	_5,594,885k	_5,604,826k	_{p=0.715 n=40}
_{Memory Allocs}	_{62,413,866 (± 0.01%)}	_{62,415,831 (± 0.01%)}	_~	_62,392,878	_62,509,828	_{p=0.795 n=40}
_{Config Time}	_{0.023s (± 0.59%)}	_{0.023s (± 0.79%)}	_~	_0.022s	_0.025s	_{p=0.308 n=40}
_{Parse Time}	_{0.921s (± 1.34%)}	_{0.932s (± 1.36%)}	_~	_0.835s	_1.063s	_{p=0.265 n=40}
_{Bind Time}	_{0.337s (± 6.06%)}	_{0.326s (± 4.58%)}	_~	_0.299s	_0.531s	_{p=0.754 n=40}
_{Check Time}	_{7.938s (± 0.63%)}	_{7.932s (± 0.52%)}	_~	_7.661s	_8.245s	_{p=0.605 n=40}
_{Emit Time}	_{2.303s (± 5.11%)}	_{2.299s (± 4.29%)}	_~	_2.009s	_3.035s	_{p=0.921 n=40}
_{Total Time}	_{11.584s (± 0.85%)}	_{11.572s (± 0.79%)}	_~	_11.181s	_12.343s	_{p=0.775 n=40}
_{webpack - native}
_Errors	₆₃₂	₆₃₂	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_912,181	_914,233	_{+2,052 (+ 0.22%)}	_~	_~	_{p=0.000 n=40}
_Types	_635,180	_636,062	_{+882 (+ 0.14%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{673,260k (± 0.01%)}	_{673,702k (± 0.01%)}	_{+460k (+ 0.07%)}	_673,294k	_674,419k	_{p=0.000 n=40}
_{Memory Allocs}	_{6,245,396 (± 0.15%)}	_{6,256,588 (± 0.12%)}	_{+14,197 (+ 0.23%)}	_6,237,469	_6,384,966	_{p=0.004 n=40}
_{Config Time}	_0.003s	_0.003s	_~	_~	_~	_{p=1.000 n=40}
_{Parse Time}	_{0.127s (± 1.58%)}	_{0.129s (± 2.53%)}	_~	_0.116s	_0.171s	_{p=0.664 n=40}
_{Bind Time}	_{0.040s (± 6.45%)}	_{0.042s (± 6.26%)}	_~	_0.034s	_0.067s	_{p=0.350 n=40}
_{Check Time}	_{1.136s (± 0.45%)}	_{1.054s (± 0.60%)}	_{🟩-0.085s (- 7.45%)}	_1.025s	_1.102s	_{p=0.000 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{1.330s (± 0.32%)}	_{1.252s (± 0.51%)}	_{🟩-0.081s (- 6.11%)}	_1.223s	_1.314s	_{p=0.000 n=40}
_{xstate-main - native}
_Errors	₁	₁	_~	_~	_~	_{p=1.000 n=40}
_Symbols	_3,952,601	_3,956,316	_{+3,715 (+ 0.09%)}	_~	_~	_{p=0.000 n=40}
_Types	_3,980,242	_3,968,091	_{-12,151 (- 0.31%)}	_~	_~	_{p=0.000 n=40}
_{Memory Used}	_{2,137,537k (± 0.01%)}	_{2,139,325k (± 0.01%)}	_{+1,790k (+ 0.08%)}	_2,138,755k	_2,140,412k	_{p=0.000 n=40}
_{Memory Allocs}	_{42,435,279 (± 0.01%)}	_{42,180,778 (± 0.01%)}	_{-255,232 (- 0.60%)}	_42,162,437	_42,219,514	_{p=0.000 n=40}
_{Config Time}	_{0.002s (± 4.68%)}	_{0.002s (± 0.39%)}	_~	_0.002s	_0.002s	_{p=1.000 n=40}
_{Parse Time}	_{0.113s (± 2.12%)}	_{0.113s (± 2.17%)}	_~	_0.098s	_0.135s	_{p=0.765 n=40}
_{Bind Time}	_{0.042s (± 6.70%)}	_{0.042s (± 6.96%)}	_~	_0.034s	_0.065s	_{p=0.844 n=40}
_{Check Time}	_{4.324s (± 1.02%)}	_{4.845s (± 0.84%)}	_{🔻+0.519s (+12.00%)}	_4.540s	_5.095s	_{p=0.000 n=40}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=40}
_{Total Time}	_{4.488s (± 1.00%)}	_{5.010s (± 0.83%)}	_{🔻+0.518s (+11.54%)}	_4.696s	_5.261s	_{p=0.000 n=40}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
arktype - native
class-transformer - native
effect - native
mui-docs - native
sentry - native
social-app - native
strada-build-src - native
strada-compiler - native
t3code-server - native
tanstack-router - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₂₀
_Baseline	_baseline	₂₀

Developer Information:

Download Benchmarks

typescript-automation · 2026-11-13T20:31:20Z

Jake Bailey (@jakebailey) Here are the results of running the top 400 repos with tsc comparing baseline and pr:

Something interesting changed - please have a look.

Details

microsoft/vscode

25 of 113 projects failed to build with the old tsc and were ignored

src/tsconfig.defineClassFields.json

error TS2345: Argument of type 'MutationObserverInit | undefined' is not assignable to parameter of type 'MutationObserverInit'.
- src/vs/base/browser/dom.ts#L1146

src/tsconfig.json

error TS2345: Argument of type 'MutationObserverInit | undefined' is not assignable to parameter of type 'MutationObserverInit'.
- src/vs/base/browser/dom.ts#L1146

src/tsconfig.monaco.json

error TS2345: Argument of type 'MutationObserverInit | undefined' is not assignable to parameter of type 'MutationObserverInit'.
- src/vs/base/browser/dom.ts#L1146

src/tsconfig.tsec.json

error TS2345: Argument of type 'MutationObserverInit | undefined' is not assignable to parameter of type 'MutationObserverInit'.
- src/vs/base/browser/dom.ts#L1146

build/checker/tsconfig.electron-browser.json

error TS2345: Argument of type 'MutationObserverInit | undefined' is not assignable to parameter of type 'MutationObserverInit'.
- src/vs/base/browser/dom.ts#L1146

Update DOM types

20be113

Copilot AI balanced review requested due to automatic review settings November 13, 2026 19:06

github-project-automation Bot added this to PR Backlog Nov 13, 2026

github-project-automation Bot moved this to Not started in PR Backlog Nov 13, 2026

typescript-automation Bot assigned Jake Bailey (jakebailey) Nov 13, 2026

typescript-automation Bot added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Nov 13, 2026

Copilot started reviewing on behalf of Jake Bailey (jakebailey) November 13, 2026 19:06

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Update DOM types - #65487

Update DOM types#65487
Jake Bailey (jakebailey) wants to merge 1 commit into
microsoft:mainfrom
jakebailey:update-dom-2026-11-13

Jake Bailey (jakebailey) commented Nov 13, 2026 •

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tsc

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microsoft/vscode

src/tsconfig.defineClassFields.json

src/tsconfig.json

src/tsconfig.monaco.json

src/tsconfig.tsec.json

build/checker/tsconfig.electron-browser.json

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tsc

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microsoft/vscode

src/tsconfig.defineClassFields.json

src/tsconfig.json

src/tsconfig.monaco.json

src/tsconfig.tsec.json

build/checker/tsconfig.electron-browser.json

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Jake Bailey (jakebailey) commented Nov 13, 2026 •

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