Optimize in-memory representation of string and datetime columns#764

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senderista wants to merge 7 commits intomasterfrom optimize_stringcol

+421-110

Commits on Aug 12, 2015

Fixing bug that assumed # codepoints was equal to # UTF-8 bytes.
Tobin Baker
committed
First stage of optimizing in-memory string column representation: deserialize string column protobuf msg into packed byte array with offsets.
Tobin Baker
committed
fix javadoc
Tobin Baker
committed
Remove unnecessary byte buffer length param.
Tobin Baker
committed
Simplify code/avoid copies by switching from ByteBuffer to ByteString.
Tobin Baker
committed

Commits on Aug 14, 2015