create-vite: set incremental: true in tsconfig

[jansepke]

Description

as a developer I want fast build times event if running a build locally. typecript offers incremental builds but those are not enabled in new vite projects

Suggested solution

set incremental: true in tsconfig to speed up the tsc part of "build": "tsc -b && vite build"

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[nayounsang]

If you guys don't mind, may I contribute to this?

[jansepke]

If you guys don't mind, may I contribute to this?

Yes, sure. The question is more if there is any reason for not setting this?

[nayounsang]

@jansepke I don't know. Why? Anyway, incremental builds are pretty sweet. Recently, my project used this and reduced typescript build time by about 2.5 times.

[nayounsang]

Ah, I just experimented and read ts docs, but incremental build is already used.
The reason is because of the -b option.
If set this, incremental builds will be executed even if not specify incremental.
But, some template(vanilla, svelte and lit - it might not be needed some, but I'm not sure.) doesn't use -b option. And If we try to do something using only tsconfig.app.json, incremental builds will not work.

What do you think?
@jansepke

[jansepke]

Ah, I just experimented and read ts docs, but incremental build is already used. The reason is because of the -b option. If set this, incremental builds will be executed even if not specify incremental.

at least when running time npx tsc -b in a newly created vite project (using npm create vite@latest with React+Typescript+SWC template) I see a big performance gain when using "incremental": true in both tsconfig.app.json and tsconfig.node.json

Without incremental: ~900ms
With incremental after the second run: ~350ms

So I cannot confirm that tsc -b implies "incremental": true and I do also not read this in the Typescript docs