Better tree shaking with deep scope analysis

Here’s my project in GSoC 2018: Improve tree-shaking for webpack, a widely used JS code bundler. IntroductionTree-shaking, a supporting feature for DCE(dead code elimination) to help DCE on cross-module usage, is a crucial feature for a bundler. It's especially true for JS. Reducing the bundle size means reducing the network cost each time a bundle is delivered for web application. Project on Gith

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webpackのTree Shakingではモジュール間同士の依存に関するDead Code Eliminationに動かないケースがあった。 そのパターンを解決するプラグインとその動作の解説について