1.js

const rootValue = {
  user,
  client,

  ...root,

  __timing: [] // store the timing info in here -- sorta hacky!
}

return graphql(schema, query, rootValue, variables).then(response => {
  response.__timing = rootValue.__timing; // take the timing info and shove it in the result now
  return response;
});

2.js

// time resolve functions ... I hope I am promising correctly!
const withTiming = (next) => {
  return (obj, args, info) => {
    const start = new Date().getTime();
    return Promise.resolve(next(obj, args, info)).then(res => {
      info.rootValue.__timing.push({
        status: 'ok',
        type: info.parentType.name,
        field: info.fieldName,
        args,
        duration: (new Date().getTime() - start) / 1000
      });
      return res;
    }, err => {
      info.rootValue.__timing.push({
        status: 'error',
        type: info.parentType.name,
        field: info.fieldName,
        args,
        duration: (new Date().getTime() - start) / 1000
      });
      return Promise.reject(err);
    });
  }
}

// default resolve fn
const dot = (name) => {
  return obj => obj ? obj[name] : null;
}

// modify the schema -- add middleware to every resolve function, lulz
Object.keys(schema.getTypeMap())
  .filter(typeName => typeName.indexOf('__') !== 0) // remove schema fields...
  .map(typeName => schema.getType(typeName))
  .filter(type => type instanceof GraphQLObjectType) // make sure its an object
  .forEach(type => {
    let fields = type.getFields();
    Object.keys(fields).forEach(fieldName => {
      let field = fields[fieldName]
      field.resolve = withTiming(field.resolve || dot(fieldName));
    });
  });

3.js

// omg incredibly boring timing
// ... toods I added a 1500 setTimeout at least :p

{
  "data": {
    "viewer": {
      "id": "9b0be370-8417-11e5-bfe9-95f5551e5224",
      "todos": [
        {
          "id": "9b0be371-8417-11e5-bfe9-95f5551e5224",
          "text": "Buy a unicorn",
          "completed": false
        },
        {
          "id": "9b0be372-8417-11e5-bfe9-95f5551e5224",
          "text": "Try out GraphQL Subscriptions",
          "completed": false
        }
      ],
      "clients": [
        {
          "id": "9b0be373-8417-11e5-bfe9-95f5551e5224",
          "type": "WEBSOCKET",
          "subscriptions": []
        }
      ]
    }
  },
  "__timing": [
    {
      "status": "ok",
      "type": "QueryRoot",
      "field": "viewer",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "Viewer",
      "field": "id",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "Viewer",
      "field": "clients",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "WebsocketClient",
      "field": "id",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "WebsocketClient",
      "field": "type",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "WebsocketClient",
      "field": "subscriptions",
      "args": {},
      "duration": 0
    },
    {
      "status": "ok",
      "type": "Viewer",
      "field": "todos",
      "args": {},
      "duration": 1.503
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "id",
      "args": {},
      "duration": 0.001
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "text",
      "args": {},
      "duration": 0.001
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "completed",
      "args": {},
      "duration": 0.001
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "id",
      "args": {},
      "duration": 0.001
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "text",
      "args": {},
      "duration": 0.001
    },
    {
      "status": "ok",
      "type": "Todo",
      "field": "completed",
      "args": {},
      "duration": 0.001
    }
  ]
}