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Hardware-portable Vector API bit-packing for VectorFastPFOR #71

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Merged
lemire merged 5 commits into from
Jun 23, 2026
Merged

Hardware-portable Vector API bit-packing for VectorFastPFOR #71

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40e2c33
Fix VectorFastPFOR corruption on reused output buffers
raunaqmorarka Jun 22, 2026
2a9e750
Add 128-bit vector bit-packing with width-tagged streams
raunaqmorarka Jun 22, 2026
bfd93b6
Add 256-bit vector bit-packing kernel
raunaqmorarka Jun 22, 2026
0f4d659
Build and test the vector module by default
raunaqmorarka Jun 19, 2026
9093b1a
Cover VectorFastPFOR with the shared codec test suites
raunaqmorarka Jun 19, 2026
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5 changes: 3 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -101,8 +101,9 @@ Most others do not.
The Java Team at Intel (R) introduced the vector implementation for FastPFOR
based on the Java Vector API that showed significant gains over the
non-vectorized implementation. For an example usage, see
examples/vector/Example.java. The feature requires JDK 19+ and is currently for
advanced users.
examples/vector/Example.java. On aarch64 (e.g. Graviton3), use JDK 24 or
later: earlier releases lack the Vector API SVE intrinsics and run a fallback
that is slower than the scalar codec.

JavaFastPFOR as a dependency
------------------------
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36 changes: 10 additions & 26 deletions pom.xml
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Expand Up @@ -90,33 +90,17 @@
<configuration>
<source>21</source>
<target>21</target>
<compilerArgs>
<arg>--add-modules</arg>
<arg>jdk.incubator.vector</arg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<argLine>--add-modules jdk.incubator.vector</argLine>
</configuration>
<executions>
<execution>
<id>default-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<excludes>
<exclude>me/lemire/integercompression/vector/*</exclude>
<exclude>module-info.java</exclude>
</excludes>
</configuration>
</execution>
<!-- The vector module is experimental, currently only for advanced users. -->
<!--<execution>
<id>vector-fastpfor</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<release>29</release>
</configuration>
</execution> -->
</executions>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
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