mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 02:44:18 +00:00
f8969ad7d4
Summary: Performance improvements for `get()` paths in the RocksJava API (JNI). Document describing the performance results. Replace uses of the legacy `DB::Get()` method wrapper returning data in a `std::string` with direct calls to `DB::Get()` passing a pinnable slice to receive this data. Copying from a pinned slice direct to the destination java byte array, without going via an intervening std::string, is a major performance gain for this code path. Note that this gain only comes where `DB::Get()` is able to return a pinned buffer; where it has to copy into the buffer owned by the slice, there is still the intervening copy and no performance gain. It may be possible to address this case too, but it is not trivial. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10970 Reviewed By: pdillinger Differential Revision: D42125567 Pulled By: ajkr fbshipit-source-id: b7a4df7523b0420cadb1e9b6c7da3ec030a8da34
138 lines
5.3 KiB
XML
138 lines
5.3 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.rocksdb</groupId>
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<artifactId>rocksdbjni-jmh</artifactId>
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<version>1.0-SNAPSHOT</version>
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<url>http://rocksdb.org/</url>
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<name>rocksdbjni-jmh</name>
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<description>JMH Benchmarks for RocksDB Java API</description>
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<organization>
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<name>Facebook, Inc.</name>
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<url>https://www.facebook.com</url>
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</organization>
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<licenses>
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<license>
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<name>Apache License 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
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<distribution>repo</distribution>
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</license>
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<license>
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<name>GNU General Public License, version 2</name>
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<url>http://www.gnu.org/licenses/gpl-2.0.html</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<scm>
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<connection>scm:git:git://github.com/facebook/rocksdb.git</connection>
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<developerConnection>scm:git:git@github.com:facebook/rocksdb.git</developerConnection>
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<url>http://github.com/facebook/rocksdb/</url>
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</scm>
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<properties>
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<project.build.source>1.7</project.build.source>
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<project.build.target>1.7</project.build.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<jmh.version>1.22</jmh.version>
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<uberjar.name>benchmarks</uberjar.name>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.rocksdb</groupId>
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<artifactId>rocksdbjni</artifactId>
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<version>7.9.0-SNAPSHOT</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-core</artifactId>
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<version>${jmh.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh.version}</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>${project.build.source}</source>
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<target>${project.build.target}</target>
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<encoding>${project.build.sourceEncoding}</encoding>
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</configuration>
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</plugin>
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<plugin>
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<groupId>com.mycila</groupId>
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<artifactId>license-maven-plugin</artifactId>
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<version>3.0</version>
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<inherited>true</inherited>
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<configuration>
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<header>LICENSE-HEADER.txt</header>
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<failIfMissing>true</failIfMissing>
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<aggregate>true</aggregate>
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<strictCheck>true</strictCheck>
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<excludes>
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<exclude>pom.xml</exclude>
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</excludes>
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<encoding>${project.build.sourceEncoding}</encoding>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.1</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<finalName>${project.artifactId}-${project.version}-${uberjar.name}</finalName>
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<transformers>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>org.openjdk.jmh.Main</mainClass>
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</transformer>
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</transformers>
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<filters>
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<filter>
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<!--
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Shading signed JARs will fail without this.
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http://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar
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-->
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<artifact>*:*</artifact>
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<excludes>
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<exclude>META-INF/*.SF</exclude>
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<exclude>META-INF/*.DSA</exclude>
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<exclude>META-INF/*.RSA</exclude>
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</filter>
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</configuration>
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</execution>
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</plugin>
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</plugins>
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</build>
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</project> |