build: improve tree shaking #3803
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arcanis
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Dec 1, 2021
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| treeshake: { | ||
| propertyReadSideEffects: false, | ||
| unknownGlobalSideEffects: false, | ||
| tryCatchDeoptimization: false, | ||
| }, |
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I'm worried about those, as it would be a massive pain to debug any issue they could accidentally cause. The gain seems fairly low, so I'd tend to favour long-term maintainability.
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Tests show something broke |
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Seems to be rollup/rollup#4195, fixed by updating |
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What's the problem this PR addresses?
Rollup is preserving code that could possibly have side effects but we know doesn't.es5code.How did you fix it?
Enable more aggressive tree shaking.es2015code.Result
Tested on this repo
$ du -sb ./.pnp-* 2665838 ./.pnp-after.cjs 2670400 ./.pnp-before.cjsChecklist