get-index provides information about <index> (created by new-index):
<count> (in "count" clause) provides the number of keys (i.e. nodes) in the index.
<hops> (in "hops" clause) provides the number of nodes accessed to find a key in the last index statement executed prior to get-index. Note that <hops> is available only in debug Gliimly build; otherwise it is always zero.