getting number of stored documents via rest api

[Stefan Rinner]

Hi

for some tests I need to know how many documents are stored in the  
index - is there a fast & easy way to retrieve this number (instead  
of searching for "*:*" and counting the results)?
I already took a look at the stats.jsp code - but there the number of  
documents is retrieved via an api call to SolrInfoRegistry and not  
the webservice.

thanks

- stefan