Comparing MongoDB query performance across v2.4, 2.6, 3.0, 3.2 and 3.4

Same hardware, different versions of MongoDB. The newest version is not always the fastest!

MongoDB query performance comparison on Raspberry Pi 2 vs 3

Comparing MongoDB query performance on a 1M collection of user data.

MongoDB 10-shard cluster vs. standalone server on Raspberry Pi 3's

How much faster is a 10-shard cluster over a standalone MongoDB server? We have the data.

MongoDB 3.4 filesystem challenge: EXT4 vs. XFS

Start mongod on an ext4 data partition and see xfs is strongly recommended over ext4. How does their performance compare?

10-shard MongoDB rPi3 cluster vs. W550s Thinkpad (i7 Broadwell / SSD)

Can a 10-shard MongoDB cluster comprised of Raspberry Pi 3's out perform a W550s Thinkpad?