What does "The code generator has deoptimised the styling of [some file] as it exceeds the max of "100KB"" mean?

webpack babeljs
Johan Alkstål picture Johan Alkstål · Apr 11, 2015 · Viewed 101.8k times · Source

I added a new npm package to my project and require it in one of my modules.

Now I get this message from webpack,

build modulesNote: The code generator has deoptimised the styling of "D:/path/to/project/node_modules/ramda/dist/ramda.js" as it exceeds the max of "100KB".

What does it mean? Do I need to take some action?

Answer

Ricardo Stuven picture Ricardo Stuven · Apr 24, 2015

This is related to compact option of Babel compiler, which commands to "not include superfluous whitespace characters and line terminators. When set to 'auto' compact is set to true on input sizes of >100KB." By default its value is "auto", so that is probably the reason you are getting the warning message. See Babel documentation.

You can change this option from Webpack using a query parameter. For example:

loaders: [
    { test: /\.js$/, loader: 'babel', query: {compact: false} }
]

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