Merge pull request #476 from adarshaj/fix/update-compression-options

Don't pass default options and remove redundant helpers. Fixes #473

config/helpers.js

@@ -1,5 +1,4 @@
 var path = require('path');
-var zlib = require('zlib');
 
 
 // Helper functions
@@ -11,10 +10,6 @@ function hasProcessFlag(flag) {
   return process.argv.join('').indexOf(flag) > -1;
 }
 
-function gzipMaxLevel(buffer, callback) {
-  return zlib['gzip'](buffer, {level: 9}, callback);
-}
-
 function root(args) {
   args = Array.prototype.slice.call(arguments, 0);
   return path.join.apply(path, [_root].concat(args));
@@ -66,7 +61,6 @@ function reverse(arr) {
 
 exports.reverse = reverse;
 exports.hasProcessFlag = hasProcessFlag;
-exports.gzipMaxLevel = gzipMaxLevel;
 exports.root = root;
 exports.rootNode = rootNode;
 exports.prependExt = prependExt;

config/webpack.prod.js

@@ -164,7 +164,6 @@ module.exports = webpackMerge(commonConfig, {
     //
     // See: https://github.com/webpack/compression-webpack-plugin
     new CompressionPlugin({
-      algorithm: helpers.gzipMaxLevel,
       regExp: /\.css$|\.html$|\.js$|\.map$/,
       threshold: 2 * 1024
     })