# Presto 316 Documentation

## 12.138. Release 0.106

## General Changes

- Parallelize startup of table scan task splits.
- Fixed index join driver resource leak.
- Improve memory accounting for JOINs and GROUP BYs.
- Improve CPU efficiency of coordinator.
- Added `Asia/Chita`, `Asia/Srednekolymsk`, and `Pacific/Bougainville` time zones.
- Fix task leak caused by race condition in stage state machine.
- Fix blocking in Hive split source.
- Free resources sooner for queries that finish prematurely.