[izpack-devel] A very slow installation when the same files exist in more than one pack

[Julien Ponge]

Hi Piotr,

> The questioned fragment of code can be found in Unpacker#run() around
> line 260,
> and it looks like this:
>     InputStream is = getPackAsStream(pf.previousPackId, pack.uninstall);
>     pis = new ObjectInputStream(is);
>     is.skip(pf.offsetInPreviousPack - 4);   // <-- very slow on big files!

You may attempt to read() to a useless buffer, but I wonder if skip()
doesn't exactly do that already...

Cheers