Result caches are vital for efficiency of search engines. In
this work, we propose a novel caching strategy in which a dynamic
result cache is split into two layers: an HTML cache and a docID cache.
The HTML cache in the first layer stores the result pages computed for
queries. The docID cache in the second layer stores ids of documents in
search results. Experiments under various scenarios show that, in terms
of average query processing time, this hybrid caching approach outperforms
the traditional approach, which relies only on the HTML cache.
