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https://issues.apache.org/jira/browse/AVRO-1282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641473#comment-13641473
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Scott Carey commented on AVRO-1282:
-----------------------------------
UnsafeUtils is a public class with public static content -- if we want to
guarantee that it is only accessed in a controlled way, it will need to be
hidden.
Additionally, the unit tests fail with this patch for me in avro-ipc:
{noformat}
Tests in error:
testError(org.apache.avro.TestNamespaceReflect):
org.apache.avro.AvroRuntimeException: No field named message in: class
org.apache.avro.test.errors.TestError
testEcho(org.apache.avro.TestProtocolReflect): java.lang.NullPointerException
testAdd(org.apache.avro.TestProtocolReflect): java.lang.NullPointerException
testEchoBytes(org.apache.avro.TestProtocolReflect):
java.lang.NullPointerException
testEcho(org.apache.avro.TestProtocolReflectMeta):
java.lang.NullPointerException
testAdd(org.apache.avro.TestProtocolReflectMeta):
java.lang.NullPointerException
testEchoBytes(org.apache.avro.TestProtocolReflectMeta):
java.lang.NullPointerException
{noformat}
> 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, avro-1282-v2.patch,
> avro-1282-v3.patch, avro-1282-v4.patch, avro-1282-v5.patch,
> avro-1282-v6.patch, avro-1282-v7.patch, avro-1282-v8.patch,
> TestUnsafeUtil.java
>
>
> 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.
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