experimental: upgrade to TS Go / Native Preview

[kamranayub]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 🙈 code conforms to the style guide
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

==================

Closes #

Changes:

• Add @typescript/native-preview package
• Enable TSGo experimental feature in VS Code
• Add types:tsgo for testing DTS build

Compare Changes

compare-types-output.zip

Build Types

# Run tsc to output declaration files to `build/types-tsc`
npm run types:tsc

# Run tsgo to output declaration files to `build/types-tsgo`
npm run types:tsgo

I am comparing the folders in WinMerge.

Performance

tsgo is roughly ~5X faster than tsc 🚀

Note

Run each command after npm run clean

tsc

npm run types -- --diagnostics     

> excalibur@0.31.0 types
> tsc --project src/engine/tsconfig.json --declaration --incremental true --tsBuildInfoFile build/dist/.tsbuildinfo --emitDeclarationOnly --diagnostics

Files:              423
Lines:           144893
Identifiers:     154360
Symbols:         156083
Types:            59301
Instantiations:   67656
Memory used:    319107K
I/O read:         0.09s
I/O write:        0.13s
Parse time:       0.72s
Bind time:        0.20s
Check time:       2.17s
Emit time:        0.42s
Total time:       3.51s

tsgo

npm run types:tsgo -- --diagnostics

> excalibur@0.31.0 types:tsgo
> tsgo --project src/engine/tsconfig.json --declaration --incremental true --tsBuildInfoFile build/dist/.tsbuildinfo --declarationDir build/types-tsgo --emitDeclarationOnly --diagnostics

Files:                    424
Lines:                 156480
Identifiers:           156408
Symbols:               203274
Types:                  99613
Instantiations:         94282
Memory used:          212301K
Memory allocs:        1707242
Config time:           0.007s
Parse time:            0.074s
Check time:            0.444s
Emit time:             0.129s
Changes compute time:  0.023s
Total time:            0.677s

Issues

It looks like tsgo is outputting several differences compared to tsc but these might be intentional.

Current State of tsgo

Missing JSDoc comments

Modified static readonly declarations

Added generic type defaults

Inconsistent quotes on union types

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View logs

[kamranayub]

Interesting that the build is stuck? It hasn't even been triggered.