3 ms·

The advanced compilation mode does some pretty powerful dead code removal and minification [1]. I guess that is available from plugins in Babel as well but Goog

by vikeri 10y ago

The advanced compilation mode does some pretty powerful dead code removal and minification [1]. I guess that is available from plugins in Babel as well but Google has been using it for Gmail, Google.com etc, so it's quite battle tested. [1]: https://developers.google.com/closure/compiler/docs/api-tutorial3 https://developers.google.com/closure/compiler/docs/api-tuto...

base698 10y ago
In my experience Babel minified better than Closure Compiler with less maintenance of the externs on my part.
- cromwellian 10y ago
  Only possible in simplified mode. I highly doubt Babel comes close with full optimizations turned on in a nontrivial codebase.
- AgentME 10y ago
  With what plugins? Babel without any plugins or with the common ES2015 plugins doesn't do any minification.
- randomguy7788 10y ago
  see http://www.syntaxsuccess.com/viewarticle/tree-shaking-in-javascript http://www.syntaxsuccess.com/viewarticle/tree-shaking-in-jav...
straws 10y ago
Dead code removal relies heavily on writing JS in a style that allows for static analysis. Dynamic requires, heavy usage of closures, knowledge of external/global variables are all things that prevent a lot of commonjs code from being removed. https://developers.google.com/closure/compiler/docs/limitations https://developers.google.com/closure/compiler/docs/limitati... has more information if you're interested in the assumptions that the compiler makes. Interestingly, we're finally starting to see these ideas get more mainstream as people adopt es6 modules and publish bundled code with explicit externs in tools like Webpack 2 and Rollup.
- masklinn 10y ago
  Works very nicely as an LLVM of sort for alt.js languages though, as they can generate JS in such a way that it matches clojure's constraints and requirements.

3 ms·

The advanced compilation mode does some pretty powerful dead code removal and minification [1]. I guess that is available from plugins in Babel as well but Goog

by vikeri 10y ago

base698 10y ago
In my experience Babel minified better than Closure Compiler with less maintenance of the externs on my part.
- cromwellian 10y ago
  Only possible in simplified mode. I highly doubt Babel comes close with full optimizations turned on in a nontrivial codebase.
- AgentME 10y ago
  With what plugins? Babel without any plugins or with the common ES2015 plugins doesn't do any minification.
- randomguy7788 10y ago
  see http://www.syntaxsuccess.com/viewarticle/tree-shaking-in-javascript http://www.syntaxsuccess.com/viewarticle/tree-shaking-in-jav...
straws 10y ago
Dead code removal relies heavily on writing JS in a style that allows for static analysis. Dynamic requires, heavy usage of closures, knowledge of external/global variables are all things that prevent a lot of commonjs code from being removed. https://developers.google.com/closure/compiler/docs/limitations https://developers.google.com/closure/compiler/docs/limitati... has more information if you're interested in the assumptions that the compiler makes. Interestingly, we're finally starting to see these ideas get more mainstream as people adopt es6 modules and publish bundled code with explicit externs in tools like Webpack 2 and Rollup.
- masklinn 10y ago
  Works very nicely as an LLVM of sort for alt.js languages though, as they can generate JS in such a way that it matches clojure's constraints and requirements.