[wubrr]

Deno does not support jsx and typescript 'without a build step'. It just runs a build/transform step for you under the hood - using the same tsc compiler, config, etc.

https://docs.deno.com/runtime/reference/jsx/

Saying this is not a 'build step' is like saying a shell script that builds and runs a C program from source has no build step.

[nextaccountic]

It has no build step. It builds when you run

It's like language implementations that nominally aren't "compiled", like Python, but nonetheless compile to bytecode when you run the program

[nsonha]

> a shell script that builds and runs a C program from source has no build step

I would say so. Ultimately build step or not isn't a meaningful thing to care about. What matters is the cold start/runtime impact. In the case of deno/bun, the impact seem minuscule/not meaningful.

[wubrr]

> Ultimately build step or not isn't a meaningful thing to care about. What matters is the cold start/runtime impact.

The two are closely related.

> In the case of deno/bun, the impact seem minuscule/not meaningful.

Seems like a pretty baseless assertion.

[nsonha]

you're right, found this benchmark https://maxday.github.io/lambda-perf