Ayende @ Rahien

My name is Oren Eini
Founder of Hibernating Rhinos LTD and RavenDB.
You can reach me by phone or email:


+972 52-548-6969

, @ Q c

Posts: 18 | Comments: 82

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Hibernating RhinosThe Movie

time to read 1 min | 155 words

Well, it is finally here, it has been ten years since I started blogging. My first blog was on April’s 1st 2004, and somehow, we are a decade later.

Usually it is time for introspective, and careful thought about what was and what will be, but I’m having no time for that. Instead, I wanted to let you know that we just finished signing with Lucas Film (well, it said Disney on the contract, but I’m a geek, so I’ll go with the more impressive title) for a movie about Hibernating Rhinos. The idea is basically similar to the Social Network, but much better.

I’m trying to see if I can get Jesse Eisenberg to play there.

And I got a budget for 999 ravens to be released in a flock at one of the scenes!

We’ll show a trailer for the movie (purely computer generated, so far) at our Conference in a week.

The seven deadly sins for the developer (* some restrictions apply)

time to read 2 min | 354 words

Originally posted at 3/30/2011
I have seen all of those in production code…
  1. throw new NullReferenceException();
  2. public class AbstractController : Controller
    // or 
    // public class AbstractPag : Page
        public static bool IsAdmin { get;set; }
  3. public static class BlogMgr
        public static void AddPostToBlog(Blog blog, Post post)
                post.Blog = blog;

* I could only think of three, but I didn’t want to modify the title. Can you complete the list?

It really happened, legacy programmers tales

time to read 2 min | 367 words

Fairy tales always start with “Once upon a time”, and programmers tales starts with “when I was at a client”…

Two days ago I was a client, and the discussion turned to bad code bases, as it often does. One story that I had hard time understanding was the Super If.

Basically, it looked like this:


I had a hard time accepting that someone could write an if condition that long. I kept assuming that they meant that the if statements were 50 lines long, but that wasn’t the case.

And then yesterday I had an even more horrifying story. A WCF service making a call to the database always timed out on the first request, but worked afterward. What would be your first suspicion? Mine was that it took time to establish the database connection, and that after the first call the connection resided in the connection pool.

They laughed at my naivety, for it wasn’t connecting to the database that caused the timeout, it was JITting the method that the WCF service ended up calling.

Yep, you got that right, JITting a single method (because the runtime only JIT a single method at a time). I had even harder time believing that, until they explained to me how that method was built:


Some interesting stats:

  • It had a Cyclomatic Complexity of either 4,000 or 8,000, the client couldn’t remember.
  • The entire Rhino Mocks codebase fits in 13,000 LOC, so this single method could contain it several times over.

But you know what the really scary part is?

I upgraded from Super If to Black Hole Methods, and I am afraid to see what happen today, because if I get something that top the Black Hole Method, I may have to hand back my keyboard and go raise olives.


  1. The insidious cost of allocations - 16 hours from now
  2. Buffer allocation strategies: A possible solution - 4 days from now
  3. Buffer allocation strategies: Explaining the solution - 5 days from now
  4. Buffer allocation strategies: Bad usage patterns - 6 days from now
  5. The useless text book algorithms - 7 days from now

And 1 more posts are pending...

There are posts all the way to Sep 11, 2015


  1. Find the bug (5):
    20 Apr 2011 - Why do I get a Null Reference Exception?
  2. Production postmortem (10):
    03 Sep 2015 - The industry at large
  3. What is new in RavenDB 3.5 (7):
    12 Aug 2015 - Monitoring support
  4. Career planning (6):
    24 Jul 2015 - The immortal choices aren't
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