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From Stefano Mazzocchi <stef...@apache.org>
Subject Re: Japi diffs for harmony
Date Fri, 03 Nov 2006 16:37:36 GMT
Stuart,

I'm a *huge* fan of your Japi diffs (I admit that I have a sort of
obsessive compulsion about it, getting happy with every small percentage
increase and sad when it decreases).

That said, I have a few questions to ask, see below.

Stuart Ballard wrote:
> Japi diff jdk15 vs harmony:
> Full results:
> http://www.kaffe.org/~stuart/japi/htmlout/h-jdk15-harmony.html
> 
> Changes since last run:
> 
> -Comparison run at Thu Nov  2 13:05:30 2006 GMT
> -jdk15 API scanned at 2006/11/02 05:19:25 EST
> -harmony API scanned at 2006/11/02 06:15:37 GMT
> +Comparison run at Fri Nov  3 13:06:47 2006 GMT
> +jdk15 API scanned at 2006/11/03 05:19:33 EST
> +harmony API scanned at 2006/11/03 11:15:31 GMT
> -javax.rmi.ssl: 100% missing
> +javax.rmi.ssl: 100% good
> -javax.swing.plaf.metal: 98.8% good, 1.19% missing
> +javax.swing.plaf.metal: 99.98% good, 0.01% missing
> -Total: 94.59% good, 0.06% minor, 0.03% bad, 5.3% missing, 0.02% abs.add
> +Total: 94.66% good, 0.06% minor, 0.03% bad, 5.23% missing, 0.02% abs.add
> -Packages: 11 missing.
> -Classes: 41 minor, 2 bad, 53 missing.
> +Packages: 10 missing.
> +Classes: 41 minor, 2 bad, 52 missing.
> -javax.rmi.ssl:
> -Missing
> -package javax.rmi.ssl: missing in harmony
> -
> -class javax.swing.plaf.metal.OceanTheme: missing in harmony

It tells me there are 10 packages and 52 classes missing. Great. Then it
gives me a percentage. Who is that percentage calculated? Is it by class
coverage? method coverage? package coverage? a weighted sum of all the
above?

> Japi diff harmony vs jdk15:
> Full results:
> http://www.kaffe.org/~stuart/japi/htmlout/h-harmony-jdk15.html

Ok, now it's the reverse...

> Changes since last run:
> 
> -Comparison run at Thu Nov  2 13:08:18 2006 GMT
> -harmony API scanned at 2006/11/02 06:15:37 GMT
> -jdk15 API scanned at 2006/11/02 05:19:25 EST
> +Comparison run at Fri Nov  3 13:09:50 2006 GMT
> +harmony API scanned at 2006/11/03 11:15:31 GMT
> +jdk15 API scanned at 2006/11/03 05:19:33 EST
> +javax.rmi.ssl: 100% good
> -javax.swing.plaf.metal: 99.34% good, 0.62% minor, 0.03% missing
> 
> -Total: 90.88% good, 0.28% minor, 0.13% bad, 8.69% missing, 0% abs.add
> +Total: 90.89% good, 0.28% minor, 0.13% bad, 8.69% missing, 0% abs.add

How is it possible that jdk15 vs harmony is 94.66% and harmony vs jdk15
is 90.88%

Also in jdk vs harmony we get that

 javax.swing.plaf.metal: 99.98% good, 0.01% missing

while in harmony vs jdk we get that

 javax.swing.plaf.metal: 99.34% good, 0.61% minor, 0.03% missing

Close, clearly, but why should they be different?

Thanks in advance for any insight.

Ah, also, would it be possible to have a list of the percentage over
time? It would be very interesting to plot the evolution of coverage
over time.

-- 
Stefano.


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