Go check the factis package and factis.io instead !
A fast, pure javascript triple store implementation, also useful as a graph database. Works in any browser, with browserify or webpack. Early development, API is subject to changes.
Hexastore is based on this research paper. It is a way to structure RDF data such that queries are really fast. However, as implemented here, it has a 6 fold increase in memory usage as compared to a naive implementation of a triple store.
Documentation on the project page: http://crubier.github.io/Hexastore
