GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/10816
[SPARK-12888][SQL] benchmark the new hash expression
Benchmark it on 4 different schemas, the result:
```
Intel(R) Core(TM) i7-4960HQ CPU @ 2.60GHz
Hash For simple: Avg Time(ms) Avg Rate(M/s) Relative
Rate
-------------------------------------------------------------------------------
interpreted version 31.47 266.54
1.00 X
codegen version 64.52 130.01
0.49 X
```
```
Intel(R) Core(TM) i7-4960HQ CPU @ 2.60GHz
Hash For normal: Avg Time(ms) Avg Rate(M/s) Relative
Rate
-------------------------------------------------------------------------------
interpreted version 4068.11 0.26
1.00 X
codegen version 1175.92 0.89
3.46 X
```
```
Intel(R) Core(TM) i7-4960HQ CPU @ 2.60GHz
Hash For array: Avg Time(ms) Avg Rate(M/s) Relative
Rate
-------------------------------------------------------------------------------
interpreted version 9276.70 0.06
1.00 X
codegen version 14762.23 0.04
0.63 X
```
```
Intel(R) Core(TM) i7-4960HQ CPU @ 2.60GHz
Hash For map: Avg Time(ms) Avg Rate(M/s) Relative
Rate
-------------------------------------------------------------------------------
interpreted version 58869.79 0.01
1.00 X
codegen version 9285.36 0.06
6.34 X
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark hash-benchmark
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10816.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10816
----
commit a8d9433b622c005390e82804f0c0c09c53cb965d
Author: Wenchen Fan <[email protected]>
Date: 2016-01-16T05:21:09Z
benchmark for hash expression
commit 28763a1bf7a70683ef392c3f7a7dbf5f56ec1fde
Author: Wenchen Fan <[email protected]>
Date: 2016-01-17T21:10:58Z
Merge remote-tracking branch 'origin/master' into hash-benchmark
commit d753ce8480115ffad37f8570b70c12a42d7e69b8
Author: Wenchen Fan <[email protected]>
Date: 2016-01-18T21:07:02Z
Merge remote-tracking branch 'origin/master' into hash-benchmark
----
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