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https://issues.apache.org/jira/browse/HIVE-12086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953235#comment-14953235
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Prasanth Jayachandran edited comment on HIVE-12086 at 10/12/15 3:53 PM:
------------------------------------------------------------------------
java version "1.8.0_60"
{code:title=ByteArrayInputStream}
Benchmark Mode Cnt Score Error Units
FloatReader.testReadFloat thrpt 50 21298626.729 ± 222871.270 ops/s
FloatReader.testReadFloatBuffered thrpt 50 21532445.861 ± 199655.972 ops/s
{code}
{code:title=InStream}
Benchmark Mode Cnt Score Error
Units
FloatReaderOrc.testReadFloat thrpt 50 14094447.673 ± 118479.602
ops/s
FloatReaderOrc.testReadFloatBuffered thrpt 50 14032977.620 ± 100002.271
ops/s
{code}
was (Author: prasanth_j):
java version "1.8.0_60"
Benchmark Mode Cnt Score Error
Units
FloatReaderOrc.testReadFloat thrpt 50 14094447.673 ± 118479.602
ops/s
FloatReaderOrc.testReadFloatBuffered thrpt 50 14032977.620 ± 100002.271
ops/s
> ORC: Buffered float readers to remove vtable thunks
> ---------------------------------------------------
>
> Key: HIVE-12086
> URL: https://issues.apache.org/jira/browse/HIVE-12086
> Project: Hive
> Issue Type: Bug
> Components: File Formats
> Affects Versions: 1.3.0, 2.0.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Minor
> Attachments: HIVE-12086.1.patch
>
>
> ORC float tree reader spends an inordinate amount of time, doing vtable
> thunks through InputStream interface.
> The actual operation is not faster with this patch, but the interface lookup
> goes down ~4x.
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