I had been using the [community golang driver |github.com/globalsign/mgo] for the past 2 years, and recenly I've decided to try the official driver fo golang since it went in beta.

Everything worked fine, but of course I was very curious how it performs in terms of speed with the old driver and I was pretty disappointed.

I have a 30 million documents collection for testing purposes, and for this test I've selected a single document by _id and I've used bombardier to do 10000 requests with 100 request concurrency.

The results are:

• Official MongoDb driver: ~ 10k req/second
• Community MongoDb driver: ~ 20k req/second

Any thoughts?