openlayers/ol3 — pull request #2870 by tsauerwein (2014-10-24 14:41:24+00:00)
Title: Use bulk-insertion for addFeatures

Right now, method `addFeatures` of `ol.source.Vector` adds feature-by-feature to the R-Tree. With #2867 we can use the method [`load()` ](https://github.com/mourner/rbush#bulk-inserting-data) of rbush, so that all features are inserted at once. Which is faster and yields a better tree.

This PR has to be rebased once #2867 is merged, but I already open it now for review.

Closes #1521