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I ported some tests from jest to bun recently and have been been pleasantly surprised -- it was pretty much a drop-in replacement and the speed difference is certainly noticeable.
That said, it was a tiny and simple test set[1]. It may not be ready yet for more complex tests, as the docs warn[2]:
> You've never seen a JavaScript test runner this fast (or incomplete).
[1] https://github.com/drifting-in-space/driftdb/blob/main/js-pk...
[2] https://bun.sh/
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I ported some tests from jest to bun recently and have been been pleasantly surprised -- it was pretty much a drop-in replacement and the speed difference is certainly noticeable.
That said, it was a tiny and simple test set[1]. It may not be ready yet for more complex tests, as the docs warn[2]:
> You've never seen a JavaScript test runner this fast (or incomplete).
[1] https://github.com/drifting-in-space/driftdb/blob/main/js-pk...
[2] https://bun.sh/
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graaljs
A ECMAScript 2022 compliant JavaScript implementation built on GraalVM. With polyglot language interoperability support. Running Node.js applications!
It's by Oracle: https://github.com/oracle/graaljs; seems to be built to interop w/ GraalVM based languages/services
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typescript(tsc) is the only one that does type checking.
bun, deno, esbuild, swc etc. can parse the syntax, but they chuck the TS (they probably don't even add it to the AST, but I haven't checked).
Keeping up with syntax is very doable. It doesn't change often, and updating the parser when it does isn't much work.
There are some past/ongoing projects[1][2] to create type checkers faster than tsc, but they aren't going to reach full parity and probably don't plan on keeping up with language features.
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SonarLint
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