[ https://issues.apache.org/jira/browse/AVRO-1282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leo Romanoff updated AVRO-1282: ------------------------------- Status: Patch Available (was: Open) I just submitted a patch that implements Unsafe-based serialization/deserialization in case of reflection-based (de)serializers. It also includes a performance test. You can run it using mvn exec:java -Dexec.mainClass="org.apache.avro.io.Perf" -Dexec.classpathScope=test -Dexec.args="-REFr" or mvn exec:java -Dexec.mainClass="org.apache.avro.io.Perf" -Dexec.classpathScope=test -Dexec.args="-reflect" On my machine I get 5x performance boost using Unsafe approach. > Make use of the sun.misc.Unsafe class during serialization if a JDK supports > it > ------------------------------------------------------------------------------- > > Key: AVRO-1282 > URL: https://issues.apache.org/jira/browse/AVRO-1282 > Project: Avro > Issue Type: Improvement > Components: java > Affects Versions: 1.7.4 > Reporter: Leo Romanoff > Priority: Minor > Attachments: avro-1282-v1.patch > > > Unsafe can be used to significantly speed up serialization process, if a JDK > implementation supports java.misc.Unsafe properly. Most JDKs running on PCs > support it. Some platforms like Android lack a proper support for Unsafe yet. > There are two possibilities to use Unsafe for serialization: > 1) Very quick access to the fields of objects. It is way faster than with the > reflection-based approach using Field.get/set > 2) Input and Output streams can be using Unsafe to perform very quick > input/output. > > 3) More over, Unsafe makes it possible to serialize to/deserialize from > off-heap memory directly and very quickly, without any intermediate buffers > allocated on heap. There is virtually no overhead compared to the usual byte > arrays. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira