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Date: Fri, 05 May 2006 15:32:45 +0200
From: Vemund Ostgaard <Vemund.Ostgaard@Sun.COM>
Subject: Re: Derby metrics
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Kathey Marsden [W.P.A YELLOW PAGES] wrote:

> I was thinking about Derby Metrics.

I think this is a good initiative Kathey, having metrics like these in 
place would be useful when discussing releases and quality.

> 1)  Has anyone compiled  any of the following information already?
> 2)  Can you think of additonal metrics that might  be useful to the 
> community?

The size of jar-files might be useful to measure/monitor (when compiled 
with the right flags and options that are used for releases). The intent 
would be to have awareness on the small, light-weight image.

In addition to measuring lines of code added or total, I've also heard 
about measuring the number of lines of code that have been changed 
(added/removed/updated), loosely refered to as measuring "code turmoil". 
With a lot of code turmoil you expect less stability, this number should 
go down when you get close to a release.

>
> Derby lines of code by component.
> Derby code coverage numbers by component.
> Lines of code added for 10.2 by component.
> Derby bugs by component and severity.
> Derby bug inflow by component and overall.

Did you plan to do this as a one shot exercise or did you want to do it 
periodically, like daily or weekly? I think weekly numbers would be 
good, would be often enough and might mask uninteresting fluctuations 
that you might see if producing daily numbers.

Vemund