TheSotrableTree is popular render-helper for AwesomeNestedSet trees. The Magick of this gem in simplicity of implementation. Gem used recursive function to render tree. But recursion is very slow when tree contain more then 100 items. This problem solved with index-hash. Yesterday I patched this index-hash, because I found logic mistake. Previous versions should works fine, but current version more stable. Please, read release note to know more.