build(performance): remove maven-shade-plugin

Use exec-maven-plugin exclusively for running benchmarks.
Fat jar adds ~20s build time with no benefit over exec:java.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dfa1

CLAUDE.md

@@ -26,21 +26,14 @@ Never use `mvn install` or `./mvwn install`.
 # Run a single test method
 ./mvnw test -pl reader -Dtest=MyTest#myMethod
 
-# Build benchmark fat jar (slow: ~20s, use for final runs)
-./mvnw package -pl performance -am -DskipTests
-
 # Run all benchmarks
-java -jar performance/target/benchmarks.jar
+./mvnw compile exec:java -pl performance -am -DskipTests
 
 # Run specific benchmark class
-java -jar performance/target/benchmarks.jar RustVsJavaReadBenchmark
+./mvnw compile exec:java -pl performance -am -DskipTests -Dexec.args="RustVsJavaReadBenchmark"
 
 # Run specific benchmark method (always use ClassName.methodName filter)
-java -jar performance/target/benchmarks.jar RustVsJavaReadBenchmark.javaReadVolume
-
-# Fast iteration (no shade, ~2s compile): compile then exec:java
-./mvnw compile -pl performance -am -DskipTests
-./mvnw exec:java -pl performance -Dexec.args="RustVsJavaReadBenchmark.javaReadVolume"
+./mvnw compile exec:java -pl performance -am -DskipTests -Dexec.args="RustVsJavaReadBenchmark.javaReadVolume"
 ```
 
 ## Architecture

performance/pom.xml

@@ -81,42 +81,7 @@
 					</annotationProcessorPaths>
 				</configuration>
 			</plugin>
-			<!-- Fat jar: java -jar target/benchmarks.jar [regexp] -->
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-shade-plugin</artifactId>
-				<version>3.6.0</version>
-				<executions>
-					<execution>
-						<phase>package</phase>
-						<goals>
-							<goal>shade</goal>
-						</goals>
-						<configuration>
-							<finalName>benchmarks</finalName>
-							<transformers>
-								<transformer
-										implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-									<mainClass>org.openjdk.jmh.Main</mainClass>
-								</transformer>
-								<transformer
-										implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
-							</transformers>
-							<filters>
-								<filter>
-									<artifact>*:*</artifact>
-									<excludes>
-										<exclude>META-INF/*.SF</exclude>
-										<exclude>META-INF/*.DSA</exclude>
-										<exclude>META-INF/*.RSA</exclude>
-									</excludes>
-								</filter>
-							</filters>
-						</configuration>
-					</execution>
-				</executions>
-			</plugin>
-			<!-- Fast iteration: ./mvnw compile exec:java -pl performance -am -DskipTests -Dexec.args="ClassName.method" -->
+			<!-- Run benchmarks: ./mvnw compile exec:java -pl performance -am -DskipTests -Dexec.args="ClassName.method" -->
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>exec-maven-plugin</artifactId>