GitHub user karup1990 opened a pull request:
https://github.com/apache/incubator-zeppelin/pull/695
ZEPPELiN-654 Improvement to SparkSqlInterpreter
### What is this PR for?
Improve performance of Sparksqlinterpreter
Use StringBuilder instead of String when building the results returned by
SparksqlInterpreter
### What type of PR is it?
Improvement
### Todos
NA
### Is there a relevant Jira issue?
### How should this be tested?
Try to run a Sparksql command that returns large number of rows(make sure
`zeppelin.spark.maxResult` is set to a larger value) with and without fix.
Keep note of the time taken in each case.
The time taken with this change is significantly lesser.
### Screenshots (if appropriate)
NA
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/karup1990/incubator-zeppelin sqlc-imp
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-zeppelin/pull/695.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 #695
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commit 11789e832ccc2c1fff8f34afa35ea13661f80eac
Author: karuppayya <[email protected]>
Date: 2016-02-04T13:08:46Z
use stringbuilder instead of string
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