Alan Pierce

Software Engineer at Benchling

[Alan Pierce @alangpierce]

@giuseppegurgone @jkup @rauchg What's an example of a transform you would want to implement in Sucrase? Keep in mind you're still able (and even encouraged) to use Babel for production builds.

[Alan Pierce @alangpierce]

@giuseppegurgone @jkup @rauchg 😁 That's why it's so fast!

[Alan Pierce @alangpierce]

@brwnll @fabiosussetto @TheLarkInn @rauchg The idea is that you aren't the one maintaining it, so you probably don't care about that part. More work for me, but in exchange, it's faster for everyone else. 🙂

(Extensibility is a more significant tradeoff, but I bet you don't actually need it for development.)

[Alan Pierce @alangpierce]

@giuseppegurgone @jkup @rauchg If you do want to write a custom transform that's as fast as Sucrase, I'd recommend forking Sucrase and modifying the parser to give you what you need for the transform to work. Or you could always use Babel, which is slower but designed to make transforms easy to write. 🙂

[Alan Pierce @alangpierce]

@giuseppegurgone @jkup @rauchg Sucrase is a focused solution, not a framework, so I'm certainly not planning on ever having a plugin system. The parser only handles what's needed for Sucrase's transforms (that's what makes it fast), and likely wouldn't be useful for other transforms anyway.

[Alan Pierce @alangpierce]

@giuseppegurgone @jkup @rauchg Here's a HN discussion on Sucrase vs Buble with both me and the Buble creator: https://t.co/dq9ngMwG6H

[Alan Pierce @alangpierce]

@drosenwasser @robpalmer2 @rauchg Thanks! 😀 And yep, I tried to be fair in the perf comparison by using transpileModule with similar config. Of course, typechecking is way, way out of scope for Sucrase.

[Alan Pierce @alangpierce]

@vitalii_akimov @rauchg The parser actually does emit scopes (just not an AST), which is needed to detect some variable shadowing cases. But yeah, it certainly tries to get away with a parser that's as minimal as possible.

[Alan Pierce @alangpierce]

@thetombell @rauchg Yep! I'd recommend separating typecheck and transpile in any TypeScript dev environment. ts-loader recommends that, for example: https://t.co/rU7P1cvq2I

[Alan Pierce @alangpierce]

@TheLarkInn @rauchg That 20% is all I really need for development. Sucrase, Babel, and tsc are all compiling the same thing in this perf comparison. The reason Babel is slow isn't because it's compiling more, it's because it's architected for extensibility and flexibility that it isn't using here.

[Alan Pierce @alangpierce]

@trevorbrindlejs @TheLarkInn @rauchg Those performance numbers are for when Babel and TypeScript are configured to only transpile typescript, JSX, and imports (what Sucrase supports). Babel and TypeScript don't get much faster when disabling transforms, which was one motivation for writing Sucrase.

[Alan Pierce @alangpierce]

I just wrote up the story of the decaffeinate open source project that I've been working on for quite a while now: https://t.co/B9PYyT8Nl7

[Alan Pierce @alangpierce]

@Vjeux Thanks!

[Vineet Gopal @theshadowfox135]

Congrats to @saifelse @nufrawth @alangpierce for shipping a great Protein Alignments tool! #proteam https://t.co/WiCUzE8INI

[Alan Pierce @alangpierce]

I just released a lambda calculus Android app: https://t.co/GUJ4k3hriz Demo video: https://t.co/D4aJ3XkjVk GitHub: https://t.co/S09Xy4j03j

[Alan Pierce @alangpierce]

I wrote a blog post on some Go hacking I did recently: https://t.co/qM7OfiNqx0

[Alan Pierce @alangpierce]

The Headspace "Blue Sky" animation is a really inspiring metaphor. https://t.co/7WOzNNbUT9

[Learning Equality @LearnEQ]

Introducing KA Litehouse: #KhanAcademy streamed from #Space, Free, Forever! https://t.co/ZOiBc8aava #edTech #kolibri

[Khan Academy @khanacademy]

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[Khan Academy @khanacademy]

Anyone at @khanacademy can propose new projects for the company. Our star developer @alangpierce is leading the way! http://t.co/pQi87eQIMK