A User Timing middleware for redux to create performance markers for dispatched actions

redux-performance-mark.js

const timing = store => next => action => {
  performance.mark(`${action.type}_start`);
  let result = next(action);
  performance.mark(`${action.type}_end`);
  performance.measure(
    `${action.type}`,
    `${action.type}_start`,
    `${action.type}_end`
  );
  return result;
};

Wow, thanks! I’d never seen these comments before 🤩