Call me incompetent, but I don't get it.
> I switched the build to SWC, and server restarts dropped to under a second.
What is SWC? The blog assumes I know it. Is it https://swc.rs/ ? or this https://docs.nestjs.com/recipes/swc ?
Pretty sure they're the same thing. The second link is on how to use swc with nestjs.
In the links you provided, swc is the same entity.
Both links are the same, SWC in this context is probably Speedy Web Compiler. It transpiles really fast but doesn't do any type checks.