Mysql over time

After my last post on mysql quality, I was wondering (and lot of comments I’ve got confirm the fact it was a good question .. ) if it was due to the release 5.1, or if it was historical bugs.
So, I’ve run the same tools, with the same compilation options and compared the version of mysql 4.1,5.0 and 5.1. Each time I took the last source version available.

The raw results are :

Mysql 4.0 : 4.8k errors
among them :
FORWARD NULL :59
RESOURCE_LEAK:32
…

Mysql 5.0 : 2.4k errors
among them :
FORWARD NULL :70
RESOURCE_LEAK:39
…

Mysql 5.1 : 2.5K errors
among them :
FORWARD_NULL: 77
RESOURCE_LEAK: 45
…

After a quick look, we can see that the type of errors change over time, I think it’s due to maturity of developers (the do less ’simple’ mistake) which increase.

There was a big clean done between 4.x and 5.0.x versions. But, since the beginning of version 5, lot of code added, introducing new bugs (nearly 5% more), without any stabilization actions.

Yahoo Tech Pulse

I was one of the lucky guys who can go to the Yahoo tech pulse. Hundred of guys showing their great technology stuff. This event was for Yahoo’s. So, i can not say to much on the technologies saw, but just that was great. I think soon you’ll see some of this stuff on YDN (Yahoo developper network), and you should be able to use this nice stuff soon.
For the pict, just have a look on flickr and shearch for Tech pulse stuff !

Enjoy !