By: Mark Bates

Mark Bates — Fri, 29 Feb 2008 00:27:21 +0000

I admit, I was very surprised as well. I’ve tried a bunch of different tests, doing different things, and they all came out the same.

Here’s an example:

These are from the console, MySQL, pulling back 1000 records:

AR:
running_time do
Post.find(:all)
end
Running time 0.079149 seconds.

DM:
running_time do
Post.find(:all)
end
Running time 0.856797 seconds.

I’m not the only one who came to these conclusions:

Notice the comment Sam Smoot left. Seems that there is a bug with 0.2.5 that makes it considerably slower.

By: Mr eel

Mr eel — Thu, 28 Feb 2008 23:05:15 +0000

I’m admittedly biased, but datamapper is 10x slower? That is certainly not my experience using the library.

By and large DM is faster. AR still has an edge in some cases, but it’s definitely not 10x faster than DM.

Wonky tests imo