Restore with Percent free space

Usually you have huge databases in production with atleast 50-60% free space
....buth when you want to restore the db in dev...you need to have similar
storage size as in prod. Would it be nice if we have a option like
"FreeSpacePercent" parameter in the restore command where we can mention how
much free space is good enough.
For Example, if a DB is 100 GB size, with only 40% of data and 60% free
space. I should be able to restore the DB using "FreeSpacePercent" = 5%, So,
all I need is 45GB instead of 100 GB in my dev environment to restore the db?
Makes sense ?
Thanks,
Ranga
Thanks...There was a similar request...but declined by MS
https://connect.microsoft.com/SQLServer/feedback/ViewFeedback.aspx?FeedbackID=125287
"Tibor Karaszi" wrote:

> The request makes sense, but the implementation would have huge ramifications on the restore
> process.
> Consider a database file in which you have pages. Any page can be in use, and any page in there can
> have the address for this page in the page header (for instance). The restore process cannot
> "compact" these pages to move them towards the beginning of the file, because of the linkage etc
> between pages. Sure, it might be physically possible, but that restore would be much much slower.
> And it might not even be possible at all, since recovery is part of the restore process and physical
> page addresses might be in the transaction log records (might be, I'm not 100% certain of this).
> Perhaps is it possible to have two types of restore: what we have today and a "compact-and-restore".
> You might want to vent such a request at http://connect.microsoft.com/site/sitehome.aspx?SiteID=68.
> --
> Tibor Karaszi, SQL Server MVP
> http://www.karaszi.com/sqlserver/default.asp
> http://www.solidqualitylearning.com/
>
> "Ranga" <Ranga@.discussions.microsoft.com> wrote in message
> news:13E008DD-4049-441E-84F5-8A972D9198CE@.microsoft.com...
>