old_contents: import { dbAdapter } from '../../../models'
  import { reportError } from '../../../support/exceptions'
  import { serializePostsCollection } from '../../../serializers/v2/post';
  
  export default class TimelinesController {
    app = null;
  
    constructor(app) {
      this.app = app;
    }
  
    bestOf = async (req, res) => {
      try {
        const DEFAULT_LIMIT = 30;
  
        const currentUserId = req.user ? req.user.id : null;
        const offset = parseInt(req.query.offset, 10) || 0;
        const limit =  parseInt(req.query.limit, 10) || DEFAULT_LIMIT;
  
        const foundPosts = await dbAdapter.bestPosts(req.user, offset, limit);
        const postsObjects = dbAdapter.initRawPosts(foundPosts, { currentUser: currentUserId });
        const postsCollectionJson = await serializePostsCollection(postsObjects);
  
        res.jsonp(postsCollectionJson);
      } catch (e) {
        reportError(res)(e);
      }
    };
  }
  
new_contents: import monitor from 'monitor-dog'
  import { dbAdapter } from '../../../models'
  import { reportError } from '../../../support/exceptions'
  import { serializePostsCollection } from '../../../serializers/v2/post';
  
  export default class TimelinesController {
    app = null;
  
    constructor(app) {
      this.app = app;
    }
  
    bestOf = async (req, res) => {
      const timer = monitor.timer('timelines.bestof-time')
  
      try {
        const DEFAULT_LIMIT = 30;
  
        const currentUserId = req.user ? req.user.id : null;
        const offset = parseInt(req.query.offset, 10) || 0;
        const limit =  parseInt(req.query.limit, 10) || DEFAULT_LIMIT;
  
        const foundPosts = await dbAdapter.bestPosts(req.user, offset, limit);
        const postsObjects = dbAdapter.initRawPosts(foundPosts, { currentUser: currentUserId });
        const postsCollectionJson = await serializePostsCollection(postsObjects);
  
        res.jsonp(postsCollectionJson);
        monitor.increment('timelines.bestof-requests')
      } catch (e) {
        reportError(res)(e);
      } finally {
        timer.stop()
      }
    };
  }
  
subject: Add performance monitoring for Best Of