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https://issues.apache.org/jira/browse/DRILL-3742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14952516#comment-14952516
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ASF GitHub Bot commented on DRILL-3742:
---------------------------------------
Github user jacques-n commented on a diff in the pull request:
https://github.com/apache/drill/pull/148#discussion_r41718323
--- Diff:
contrib/storage-hive/core/src/main/java/org/apache/drill/exec/expr/fn/HiveFunctionRegistry.java
---
@@ -53,12 +54,14 @@
* @param config
*/
public HiveFunctionRegistry(DrillConfig config) {
- Set<Class<? extends GenericUDF>> genericUDFClasses =
PathScanner.scanForImplementations(GenericUDF.class, null);
+ // TODO: see if we can avoid this. We can't change the constructor
right now.
+ ScanResult classpathScan = ClassPathScanner.fromPrescan(config);
--- End diff --
Doesn't this cause a second scan?
> Improve classpath scanning to reduce the time it takes
> ------------------------------------------------------
>
> Key: DRILL-3742
> URL: https://issues.apache.org/jira/browse/DRILL-3742
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Julien Le Dem
> Fix For: Future
>
>
> classpath scanning and function registry take a long time (seconds every
> time).
> We'd want to avoid loading the classes (use bytecode inspection instead) and
> have a build time cache to avoid doing the scanning at startup.
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