A webpack plugin that crudely measures the execution time of UglifyJSPlugin

crude-timing-plugin.js

let CrudeTimingPlugin = function() {};

CrudeTimingPlugin.prototype.apply = function(compiler) {
	compiler.plugin('compilation', (compilation) => {
		let startOptimizePhase;

		compilation.plugin('optimize-chunk-assets', (chunks, callback) => {
			// Cruddy way of measuring minification time. UglifyJSPlugin does all
			// its work in this phase of compilation so we time the duration of
			// the entire phase
			startOptimizePhase = Date.now();
      
			// For async phases: don't forget to invoke the callback
			callback();
		});

		compilation.plugin('after-optimize-chunk-assets', () => {
			const optimizePhaseDuration = Date.now() - startOptimizePhase;
			console.log(`optimize-chunk-asset phase duration: ${optimizePhaseDuration}`);
		});
	});
};

module.exports = CrudeTimingPlugin;