pass query itself to endQuery event.

[facelessTT]

subj. It can be really helpful while catching slow queries.

    this.db.on("endQuery", function (obj, q) {
        if (obj.err)
            console.error(obj.err);

        var queryPerformance = obj && obj.perf && obj.perf.query ? obj.perf.query : -1;
        if (queryPerformance > 500)
            console.log('slow query performance:' + queryPerformance + ' on connection ' + options.connectionID);
//It would be nice to see, what query did its job slow
    });

in db.js:

  if (this.listeners('endQuery').length > 0) {
    var err, e, s = Date.now();
    promise
      .bind(this)
      .catch(function (_err) {
        err = _err;
      })
      .tap(function (res) {
        e = Date.now();
        this.emit("endQuery", {
          err: err,
          result: res,
          perf: {
            query: e - s
          }, 
            data: data
        });
      });
  }

[StarpTech]

Would be great to get informations from serialization, network and query execution on the db. Measure time at the highest level is just an estimated value.

[wolf4ood]

@StarpTech

what would be cool but it will require more efforts.
Meanwhile i've implemented this. We can open a new issue to track the other enhancements.
Thanks

[wolf4ood]

Docs updated
http://orientdb.com/docs/last/OrientJS-Events.html