Gabriella Gyorgyevics has uploaded a new patch set (#4). (
http://gerrit.cloudera.org:8080/23401 )
Change subject: IMPALA-14386: Add benchmarks for Byte Stream Split encoding
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IMPALA-14386: Add benchmarks for Byte Stream Split encoding
This patch adds benchmarks to the Byte Stream Split encoding. It
compares different ways to use the decoder.
I added benchmarks for the following comparisons:
* Compile VS Runtime initialized decoder
* Float VS Int VS Double VS Long VS 6 and 11 byte size types
* Repeating VS Sequential VS Random ordered data
* Decoding one by one VS in batch VS with stride (!= byte_size)
* Small VS Medium (10x small) VS Large (100x small) stride
Conclusions:
* Passing the byte size as a template parameter is almost 5 times
as fast as passing it in the constructor.
* The size of the type heavily influences the speed
* The data variation doesn't influence the speed at all
* Reading values in batch is much faster than one-by-one
* The stride sizes have a small influence on the speed
For more details and graphs, go to
https://docs.google.com/spreadsheets/d/129LwvR6gpZInlRhlVWktn6Haugwo_fnloAAYfI0Qp2s
Change-Id: I708af625348b0643aa3f37525b8a6e74f0c47057
---
M be/src/benchmarks/CMakeLists.txt
A be/src/benchmarks/parquet-byte-stream-split-decoder-benchmark.cc
2 files changed, 515 insertions(+), 0 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/01/23401/4
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I708af625348b0643aa3f37525b8a6e74f0c47057
Gerrit-Change-Number: 23401
Gerrit-PatchSet: 4
Gerrit-Owner: Gabriella Gyorgyevics <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Daniel Becker <[email protected]>
Gerrit-Reviewer: Gabriella Gyorgyevics <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Noemi Pap-Takacs <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
