raininfall.redux-perf-middleware/lib/index.js

Measure the time that actions needs to change the state

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
/**
* Redux performance logger
*
* @author  Avraam Mavridis      <avr.mav@gmail.com>
*
*/

var present = require('present');

var perflogger = exports.perflogger = function perflogger(store) {
  return function (next) {
    return function (action) {
      var start = present();
      console.log('%c Dispatching type "' + String(action.type) + '" start ' + start.toFixed(2) + ' ms.', 'background: #222; color: #bada55');
      var result = next(action);
      var end = present();
      console.log('%c Action with type "' + String(action.type) + '" end ' + end.toFixed(2) + ' ms, took ' + (end - start).toFixed(2) + ' ms', 'background: #bada55; color: #222');
      return result;
    };
  };
};

exports.default = perflogger;