[jira] [Created] (PARQUET-517) Ensuring aligned memory on encode / decode hot paths for SSE optimizations

["Wes McKinney (JIRA)" <ji...@apache.org>]

Wes McKinney created PARQUET-517:
------------------------------------

             Summary: Ensuring aligned memory on encode / decode hot paths for SSE optimizations
                 Key: PARQUET-517
                 URL: https://issues.apache.org/jira/browse/PARQUET-517
             Project: Parquet
          Issue Type: Improvement
          Components: parquet-cpp
            Reporter: Wes McKinney


We are using {{std::vector}} in many places for memory allocation; if we want to use SSE on this memory we may run into some problems.

Couple things we should do

* Add an STL allocator for {{std::vector}} that ensure 16-byte aligned memory
* Check user-provided memory for alignment before utilizing an SSE-accelerated routine (e.g. SSE hash functions for dictionary encoding) and decide whether to copy and use SSE or no-copy and use no-SSE code.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)