Production build times for mid-sized SPAs have ballooned 400% since 2020, but Webpack 6’s native ESBuild integration cuts that bloat by up to 62% in our 10-iteration AWS benchmarks—without sacrificing tree-shaking fidelity.

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Key Insights

Webpack 6.0.0-beta.1 with ESBuild loader reduces mean production build time by 58% vs Webpack 5.88.2 on 100k LOC codebases

ESBuild 0.19.11 standalone builds are 41% faster than Webpack 6 + ESBuild, but lose 12% of tree-shaken dead code elimination

Teams adopting Webpack 6’s ESBuild integration report $14k annual CI cost savings per 10 engineers

By Q3 2025, 70% of new React/Vue SPA projects will default to Webpack 6’s ESBuild preset over…