[plugin-legacy] The code generator has deoptimised the styling of ...

[DreierF]

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Describe the bug

I'm getting a lot of logs in the production build when using @vitejs/plugin-legacy of the form:

[BABEL] Note: The code generator has deoptimised the styling of undefined as it exceeds the max of 500KB.

This originates from babel's generatorOpts.compact option that is set to 'auto' by default. As you probably always want a compact output in the production build I would suggest to set this to true regardless of the size of the code.

This is not really a big issue, but I also cannot manually override this setting or suppress the logs otherwise.

Reproduction

Just analyze a codebase with sufficiently large dependencies.

System Info

• vite version: 2.0.0-beta60
• Operating System: MacOS
• Node version: 14.15
• Package manager (npm/yarn/pnpm) and version: yarn