ini

.gitignore

@@ -0,0 +1,156 @@
+### Maven template
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+# https://github.com/takari/maven-wrapper#usage-without-binary-jar
+.mvn/wrapper/maven-wrapper.jar
+
+# Eclipse m2e generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Gradle template
+.gradle
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
+
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### Android template
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof
+

README.md

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+# StackTrace
+
+## Setup
+
+Set the GraalVM JDK17 path in `gradle.properties`
+
+```
+org.gradle.java.installations.paths=/home/user/graalvm-community-java17-linux-amd64-dev/graalvm-community-openjdk-17.0.7+4.1
+```
+
+When using a different JDK version, you might need to change the `build.gradle.kts` file
+
+```
+languageVersion.set(JavaLanguageVersion.of(17))
+```
+
+to a version of your liking.
+
+If nothing is set, an error will be shown
+
+```
+* What went wrong:
+Execution failed for task ':compileJava'.
+> Error while evaluating property 'javaCompiler' of task ':compileJava'.
+   > Failed to calculate the value of task ':compileJava' property 'javaCompiler'.
+      > No matching toolchains found for requested specification: {languageVersion=17, vendor=any, implementation=vendor-specific}.
+         > No locally installed toolchains match (see https://docs.gradle.org/8.0/userguide/toolchains.html#sec:auto_detection) and toolchain auto-provisioning is not enabled (see https://docs.gradle.org/8.0/userguide/toolchains.html#sec:auto_detection).
+```
+
+## Run 
+
+### OpenJDK
+
+```
+./gradlew run --no-daemon --rerun-tasks
+```
+
+### native-image
+
+```
+./gradlew nativeCompile --no-daemon --rerun-tasks --info
+```
+
+and 
+
+```
+./build/native/nativeCompile/bench_amd64
+```
+
+## Result
+
+Run on amd64 (5.4.0-146-generic)
+
+```
+GraalVM CE 23.1.0-dev-20230414_0206
+https://github.com/graalvm/graalvm-ce-dev-builds/releases/tag/23.1.0-dev-20230414_0206
+graalvm-community-java17-linux-amd64-dev.tar.gz
+```
+
+### OpenJDK 17 hotspot C2
+
+```
+Benchmark                                             Mode  Cnt     Score    Error   Units
+FromStringBench.valueOf                               avgt    5     4.729 ±  0.234   ns/op
+FromStringBench.valueOf:·gc.alloc.rate                avgt    5    ≈ 10⁻⁴           MB/sec
+FromStringBench.valueOf:·gc.alloc.rate.norm           avgt    5    ≈ 10⁻⁷             B/op
+FromStringBench.valueOf:·gc.count                     avgt    5       ≈ 0           counts
+FromStringBench.valueOfException                      avgt    5  1195.178 ± 65.872   ns/op
+FromStringBench.valueOfException:·gc.alloc.rate       avgt    5   766.129 ± 41.666  MB/sec
+FromStringBench.valueOfException:·gc.alloc.rate.norm  avgt    5   960.000 ±  0.001    B/op
+FromStringBench.valueOfException:·gc.count            avgt    5   129.000           counts
+FromStringBench.valueOfException:·gc.time             avgt    5    84.000               ms
+```
+
+### native-image JDK17
+
+```
+# JMH version: 1.36
+# VM version: JDK 17.0.7, Substrate VM, 17.0.7+4
+```
+
+```
+Benchmark                                        Mode  Cnt     Score    Error   Units
+FromStringBench.valueOf                          avgt    5     7.475 ±  0.187   ns/op
+FromStringBench.valueOf:·gc.alloc.rate           avgt    5       ≈ 0           MB/sec
+FromStringBench.valueOf:·gc.count                avgt    5       ≈ 0           counts
+FromStringBench.valueOfException                 avgt    5  2988.646 ± 23.550   ns/op
+FromStringBench.valueOfException:·gc.alloc.rate  avgt    5       ≈ 0           MB/sec
+FromStringBench.valueOfException:·gc.count       avgt    5   437.000           counts
+FromStringBench.valueOfException:·gc.time        avgt    5   898.000               ms
+```
+
+![flamegraph](./doc/flamegraph_valueOfException.png)

build.gradle.kts

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+plugins {
+    java
+    application
+    id("com.github.johnrengelman.shadow") version "8.1.1"
+    id("org.graalvm.buildtools.native") version "0.9.21"
+}
+
+group = "io.sergejisbrecht"
+version = "1.0-SNAPSHOT"
+
+application {
+    mainClass.set("io.sergejisbrecht.HelloWorldOpenJdk")
+}
+
+repositories {
+    mavenCentral()
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
+
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+        // vendor.set(JvmVendorSpec.matching("GraalVM Community"))
+    }
+}
+
+dependencies {
+    implementation("org.openjdk.jmh:jmh-core:1.36")
+    annotationProcessor("org.openjdk.jmh:jmh-generator-annprocess:1.36")
+}
+
+tasks.withType<Zip> {
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
+}
+
+tasks.withType<Tar> {
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
+}
+
+graalvmNative {
+    binaries {
+        agent {
+            defaultMode.set("standard") // Default agent mode if one isn't specified using `-Pagent=mode_name`
+            enabled.set(false) // Enables the agent
+        }
+
+        this["main"].run {
+            this.useFatJar.set(true)
+
+            println("BUILD main")
+
+            imageName.set("bench_amd64")
+            verbose.set(true)
+
+            javaLauncher.set(javaToolchains.launcherFor {
+                languageVersion.set(JavaLanguageVersion.of(17))
+                // vendor.set(JvmVendorSpec.matching("GraalVM Community"))
+            })
+
+            mainClass.set("io.sergejisbrecht.HelloWorldNativeImage")
+
+            buildArgs.add("--verbose")
+            buildArgs.add("--no-fallback")
+            // buildArgs.add("-g")
+            // buildArgs.add("-H:-DeleteLocalSymbols")
+            buildArgs.add("-H:IncludeResources=.*/BenchmarkList")
+            buildArgs.add("-H:Log=registerResource:verbose")
+            buildArgs.add("--initialize-at-build-time=org.openjdk.jmh.infra,org.openjdk.jmh.util.Utils,org.openjdk.jmh.runner.InfraControl,org.openjdk.jmh.runner.InfraControlL0,org.openjdk.jmh.runner.InfraControlL1,org.openjdk.jmh.runner.InfraControlL2,org.openjdk.jmh.runner.InfraControlL3,org.openjdk.jmh.runner.InfraControlL4")
+            buildArgs.add("-H:-SpawnIsolates")
+            buildArgs.add("-H:+UseSerialGC")
+            buildArgs.add("-H:InitialCollectionPolicy=BySpaceAndTime")
+            // buildArgs.add("-H:+SourceLevelDebug")
+            // buildArgs.add("-H:AlignedHeapChunkSize=2097152")
+            // buildArgs.add("--native-compiler-path=/usr/bin/gcc-10")
+            buildArgs.add("-H:AlignedHeapChunkSize=524288")
+            buildArgs.add("-H:+ReportExceptionStackTraces")
+            buildArgs.add("--enable-monitoring=all")
+            buildArgs.add("-J-Xmx20g")
+            buildArgs.add("-march=native")
+
+        }
+    }
+}

gradle.properties

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+org.gradle.java.installations.auto-download=false
+org.gradle.java.installations.auto-detect=false
+org.gradle.java.installations.paths=

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists