SWC with Type Checking – Build Time Increased

[gunjourain112]

Describe the feature

I'm developing with Nest.js v11 and tested SWC for faster builds.

• Jest Tests: 71s → 20s
• nest start -b swc: 7.69s → 2.16s
• nest start -b swc --type-check: 8s (same as old tsc build)

Since enabling type checking doesn't provide much of a speed improvement, fully adopting SWC for my workflow is challenging.

Current Workaround:
I’m using SWC only for Jest tests to speed up development.
For deployments, I’m still using the standard tsc build for type checking.
Additionally, since the speed difference in local development is minimal, I continue using tsc for builds.

Question:
Is there a way to improve SWC's type-checking speed?
Can it be optimized or parallelized for better performance?

Thanks!

Babel plugin or link to the feature description

No response

Additional context

No response

[kwonoj]

SWC doesn't do any typecheck, that options is from nest.js using typescript internally.