cnap-cobre/synapse

const round = number => (Math.round(number * 100) / 100);
 
const monitorReducerEnhancer = createStore => (
  reducer,
  initialState,
  enhancer,
) => {
  const monitoredReducer = (state, action) => {
    const start = performance.now();
    const newState = reducer(state, action);
    const end = performance.now();
    const diff = (round(end - start));
 
    console.log('reducer process time:', diff);
 
    return newState;
  };
 
  return createStore(monitoredReducer, initialState, enhancer);
};
 
export default monitorReducerEnhancer;