[stevelosh]

> it shows that Mongo is faster in a single threaded process, using the most popular ruby client of each system.

No, it doesn't. You ran 100k increments on one key and divided by time ONCE and printed the result.

Plus this was on your Macbook Pro, which is probably running a mail client, Twitter client, web browser, and hundreds of other things that could have affected the times.

Graphing the response times for each increment would be a good way to start looking at what the data really shows, instead of going by a single opaque, fairly useless number.