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;
};

Wanted to thank you for this! Popped up first when I googled "user timing api redux" and worked flawlessly.

I second this, very useful middleware !