[2/4] git commit: Update tuning.md

Update tuning.md http://stackoverflow.com/questions/9699071/what-is-the-javas-internal-represention-for-string-modified-utf-8-utf-16 Author: Andrew Ash Closes #384 from ash211/patch-2 and squashes the following commits: da1b0be [Andrew Ash] Update tuning.md Project: http://git-wip-us.apache.

git commit: Update tuning.md

Repository: spark Updated Branches: refs/heads/master 7b52b6631 -> f04666252 Update tuning.md http://stackoverflow.com/questions/9699071/what-is-the-javas-internal-represention-for-string-modified-utf-8-utf-16 Author: Andrew Ash Closes #384 from ash211/patch-2 and squashes the following com