As others have noted, the data format has not changed and should be compatible.

The performance difference you note is curious.  I wonder if this
could be related to the following issue?

You could try the 1.7.6 release candidate to test this:

The 1.7.6-rc0 Maven staging repository is at:


On Wed, Jan 22, 2014 at 8:29 AM, Jun Rao <[EMAIL PROTECTED]> wrote:

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