optimal minification setttings to get best tradeoff between file size, speed, and debuggability

rspack.config.js

module.exports = {
  // ...
  optimization: {
    minimizer: [
      new SwcJsMinimizerRspackPlugin({
        compress: {
          // prevents it from combining a bunch of statements with ","s so it is easier to set breakpoints
          sequences: false,

          // these are all things that terser does by default but we turn
          // them off because they don't reduce file size enough to justify the
          // time they take, especially after gzip:
          // see: https://slack.engineering/keep-webpack-fast-a-field-guide-for-better-build-performance-f56a5995e8f1
          booleans: false,
          collapse_vars: false,
          comparisons: false,
          computed_props: false,
          hoist_props: false,
          if_return: false,
          join_vars: false,
          keep_infinity: true,
          loops: false,
          negate_iife: false,
          properties: false,
          reduce_funcs: false,
          reduce_vars: false,
          typeofs: false,
        },
        output: {
          // this is where the vast majority of the benefits from minification come from:
          // just removing all the comments
          comments: false,

          // prevents everything being on one line so it's easier to view in devtools
          semicolons: false,
        },
      }),
    ],
  },
}