Fix Wasm.Performance benchmark invalid Locale

[LoopedBard3]

Fix BlazorWasm test invalid Locale

Update Wasm.Performance benchmark to explicitly set Locale to en-US.

Description

Update Wasm.Performance benchmark to explicitly set Locale to en-US when browsing to the benchmark page to fix an invalid culture identifier (en-us@posix) error being hit in the ASP.NET Performance lab.

Fixes #64450

The local test still gives the following error but it seems to be after all of the testing, when the container shutsdown:
[Browser Log]: Failed to load resource: net::ERR_CONNECTION_RESET

Full local test log:

sudo docker start 9696c5109 && sudo docker logs 9696c5109 -f
9696c5109
Application started.
warn: Microsoft.AspNetCore.Hosting.Diagnostics[15]
      Overriding HTTP_PORTS '8080' and HTTPS_PORTS ''. Binding to values defined by URLS instead 'http://127.0.0.1:0'.
warn: Microsoft.AspNetCore.Hosting.Diagnostics[15]
      Overriding HTTP_PORTS '8080' and HTTPS_PORTS ''. Binding to values defined by URLS instead 'http://127.0.0.1:0'.
Test app listening at http://127.0.0.1:44167.
[Browser Log]: Download size:  2663776
[Browser Log]: Completed benchmark Time to first UI
[Browser Log]: Completed benchmark Render 10 items
[Browser Log]: Completed benchmark Render 100 items
[Browser Log]: Completed benchmark Render 1000 items
[Browser Log]: Completed benchmark Serialize 1kb
[Browser Log]: Completed benchmark Serialize 340kb
[Browser Log]: Completed benchmark Serialize 340kb (Source Generated)
[Browser Log]: Completed benchmark Deserialize 1kb
[Browser Log]: Completed benchmark Deserialize 340kb
[Browser Log]: Completed benchmark Deserialize 340kb (Source Generated)
[Browser Log]: Completed benchmark Serialize 340kb (JavaScript)
[Browser Log]: Completed benchmark Deserialize 340kb (JavaScript)
[Browser Log]: Completed benchmark Render small nested component
[Browser Log]: Completed benchmark Render large nested component
[Browser Log]: Completed benchmark Render component with edit
[Browser Log]: Completed benchmark PlainTable: From blank
[Browser Log]: Completed benchmark PlainTable: Switch pages
[Browser Log]: Completed benchmark ComplexTable: From blank
[Browser Log]: Completed benchmark ComplexTable: Switch pages
[Browser Log]: Completed benchmark FastGrid: From blank
[Browser Log]: Completed benchmark FastGrid: Switch pages
#StartJobStatistics
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Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsonserialize-340kb","ShortDescription":"Serialize 340kb","LongDescription":"Serialize JSON 340kb - Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsonserialize-sourcegen-340kb","ShortDescription":"Serialize 340kb (Source Generated)","LongDescription":"Serialize JSON (SourceGen) 340kb - Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsondeserialize-1kb","ShortDescription":"Deserialize 1kb","LongDescription":"Deserialize JSON 1kb - Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsondeserialize-340kb","ShortDescription":"Deserialize 340kb","LongDescription":"Deserialize JSON 340kb - Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsondeserialize-sourcegen-340kb","ShortDescription":"Deserialize 340kb (Source Generated)","LongDescription":"Deserialize JSON (SourceGen) 340kb - Time in ms","Format":"n2"},{"Source":"BlazorWasm","Name":"blazorwasm/jsonserialize-javascript-340kb","ShortDescription":"Serialize 340kb (JavaScript)","LongDescription":"Serialize JSON 340kb using JavaScript - 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#EndJobStatistics


Download size: 2601kb.
| Name | Description | Duration | NumExecutions |
--------------------------
| blazorwasm/time-to-first-ui | Time to first UI | 427.09999999403954 | 12 |
| blazorwasm/render-10-items | Render 10 items | 1.6426229508074581 | 3099 |
| blazorwasm/render-100-items | Render 100 items | 6.044776119402985 | 948 |
| blazorwasm/render-1000-items | Render 1000 items | 49.877777778440056 | 103 |
| blazorwasm/jsonserialize-1kb | Serialize 1kb | 0.7538606402957058 | 6865 |
| blazorwasm/jsonserialize-340kb | Serialize 340kb | 13.968965517035846 | 391 |
| blazorwasm/jsonserialize-sourcegen-340kb | Serialize 340kb (Source Generated) | 14.489285713859967 | 377 |
| blazorwasm/jsondeserialize-1kb | Deserialize 1kb | 0.7604562737642586 | 7378 |
| blazorwasm/jsondeserialize-340kb | Deserialize 340kb | 26.33750000037253 | 235 |
| blazorwasm/jsondeserialize-sourcegen-340kb | Deserialize 340kb (Source Generated) | 27.366666666666667 | 224 |
| blazorwasm/jsonserialize-javascript-340kb | Serialize 340kb (JavaScript) | 0.4347826086956522 | 13747 |
| blazorwasm/jsondeserialize-javascript-340kb | Deserialize 340kb (JavaScript) | 0.6616528925816875 | 8902 |
| blazorwasm/orgchart-1-4-org | Render small nested component | 10.092499999701976 | 483 |
| blazorwasm/orgchart-3-3-org | Render large nested component | 59.58571428486279 | 87 |
| blazorwasm/edit-orgchart-3-2 | Render component with edit | 21.663157894423136 | 214 |
| blazorwasm/render-plaintable-from-blank | PlainTable: From blank | 100.04999999701977 | 50 |
| blazorwasm/render-plaintable-switch-pages | PlainTable: Switch pages | 51.48750000074506 | 112 |
| blazorwasm/render-complextable-from-blank | ComplexTable: From blank | 195.66666666666669 | 30 |
| blazorwasm/render-complextable-switch-pages | ComplexTable: Switch pages | 173.59999999900657 | 33 |
| blazorwasm/render-fastgrid-from-blank | FastGrid: From blank | 23.20555555489328 | 238 |
| blazorwasm/render-fastgrid-switch-pages | FastGrid: Switch pages | 19.923809524093354 | 275 |
Done executing benchmark
[Browser Log]: Failed to load resource: net::ERR_CONNECTION_RESET

[LoopedBard3]

I have tested this locally and was able to successfully run the BlazorWasm test docker container.

[Copilot]

Pull request overview

This PR fixes an invalid culture identifier error (en-us@posix) in the ASP.NET Performance lab by explicitly setting the browser locale to "en-US" when creating a new Playwright page in the Wasm.Performance benchmark driver.

• Updates the NewPageAsync call to include locale configuration