Like @jdalton did with his .gz loading, the cost of *reading* files can be prohibitive if your disk is slower/cpu is fast enough
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I think this calculus changes with es2015 modules, but we're a while away from bundles composed entirely of es2015 source.
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I think even with JS modules the bundling will be a worse dev experience. E.g. having to deal with source maps.
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Source maps need to get better.
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The ecosystem is just not good at pipelines that produce reliable source maps. We gotta fix that.
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A standout: TypeScript. Their sourcemaps are delightful.
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Lol we need a sourcemap spec. Not just a gdoc. Not down playing the work. But implying a revisit strongly needed to be etched in W3C tablets
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Of note: early node people used the fact that sourcemaps was "just a gdoc" as proof that specs weren't really necessary ;)
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Lol. Well I mean I like the spec process when it's Done Right

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