Webpack slow config

webpack.config.js

module.exports = env => {
	const config = {
		devServer: {
			hot: true,
      inline: true,
			headers: { 'Access-Control-Allow-Origin': '*' },
			port: 8080,
			host: 'localhost',
		},
		entry: {
            app: ['./resources/assets/js/app.js', './resources/assets/sass/app.scss'],
		},
        plugins: [
            new ProgressBarPlugin(),
            new webpack.NamedModulesPlugin(),
            new webpack.HotModuleReplacementPlugin(),
        ],
		output: {
			filename: 'js/[name].js',
			path: path.resolve(__dirname, 'public/js/'),
      publicPath: '/'
		},
		module: {
			rules: [
                {
                    test: /\.(png|jpg|jpeg|gif|eot|ttf|woff|woff2|svg|svgz)(\?.+)?$/,
                    exclude: /favicon\.png$/,
                    use: [{
                        loader: 'url-loader',
                        options: {
                            name: path.resolve(__dirname, 'public/css')
                        }
                    }]
                },
                {
                    test: /\.scss$/,
                    exclude: /(node_modules)/,
                    use: ['css-hot-loader'].concat(ExtractTextPlugin.extract({
                        fallback: 'style-loader',
                        use: ['css-loader?url=false', 'postcss-loader', 'sass-loader'],
                    })),
                },
                {
					test: /\.css$/,
					use: ['css-hot-loader'].concat(ExtractTextPlugin.extract({
						fallback: 'style-loader',
						use: ['css-loader']
					})),
                },
				{
					test: /\.js$/,
					exclude: /(node_modules)/,
					loader: 'babel-loader',
				},
				{
					test: /\.vue$/,
					loader: 'vue-loader',
                    options: {
                        loaders: {
                            'scss': 'vue-style-loader!css-loader!sass-loader',
                            'sass': 'vue-style-loader!css-loader!sass-loader?indentedSyntax'
                        }
                    }
				},
			]
		},
		resolve: {
			extensions: ['.js'],
			alias: {
				'vue$': 'vue/dist/vue.esm.js',
			}
		},
	};

    if (process.env.NODE_ENV === 'production') {
        config.watch = false;
    }

	if (env.server) {
		config.plugins.push(new ExtractTextPlugin('css/[name].css'));
	} else {
		config.plugins.push(new ExtractTextPlugin('../css/[name].css'));
	}


	return config;
};