Dean Long
Principal Member Of Technical Staff, Java - JVM at Oracle
San Diego, California, United States
Summary
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RockstarDean Long is a Principal Member of Technical Staff at Oracle with 14 years of experience specializing in the Java JVM, HotSpot compilers (C1/C2), AOT, Graal, and embedded ARM platforms. He focuses on low-level JIT/AOT compiler optimizations and pragmatic code generation changes that improve performance, security, and maintainability of the core JDK. Based in San Diego, he is an active contributor to high-profile open-source projects including openjdk/jdk and oracle/graal, where his work touches GraalVM native-image compatibility and invokedynamic/AOT interactions. Dean blends deep systems expertise with practical engineering—ship-ready fixes, style and API adjustments, and subtle changes to code cache and mark handling that ease long-term maintenance. His contributions show a knack for resolving intricate compiler-edge cases while keeping broader platform stability in mind.
14 years of coding experience
Github Skills (15)
hotspot10
javas10
compiler10
compiler-compiler10
jit10
graalvm10
aot10
compile10
java10
x869
x86-649
arm9
vms8
internals8
bytecode7
Programming languages (2)
Github contributions (5)
openjdk/jdk
Jun 2020 - Jun 2026
JDK main-line development https://openjdk.org/projects/jdk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1197 reviews, 58 PRs, 1747 comments in 6 years 1 month
Contributions summary:Dean primarily focused on modifying code within the Java Development Kit (JDK), specifically within the GraalVM compiler, and related JIT compiler optimizations. Their work involved updating and implementing features for JIT compilation, as well as fixing issues related to the use of invokedynamic instructions in AOT compilations. The commits also reveal involvement in security-related concerns within the JDK.
openjdkjavajvmjdk
oracle/graal
Feb 2020 - Jun 2020
GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 comments, 1 issue in 4 months
Contributions summary:Dean primarily focused on improving the GraalVM compiler, specifically addressing issues related to code generation and optimization. Their work involved fixing style issues and making adjustments to the compiler to be "libgraal-friendly". The user also worked on version predicates and mark handling, and jaotc compatibility issues, which likely involved low-level changes to the code cache installation process to support features such as -XX:+VerifyOops. These modifications suggest contributions to the core functionality and maintainability of the compiler.
graalvmjavaaotcompiler
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