Pengfei Li
Staff Software Engineer at Arm
Shanghai, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolPengfei Li is a Staff Software Engineer with 7 years of experience specializing in compiler and virtual machine development, currently based in Shanghai and working at Arm. He has driven AArch64 performance and feature work across OpenJDK (49 commits), Graal, and PHP-JIT, including SVE vectorization and JVM backend optimizations that earned community recognition and an OpenJDK committer role. Pengfei has hands-on experience building compiler backends for heterogeneous and home-grown ISAs (Sunway, PCX) and porting toolchains to RISC-V, plus production compiler optimizations that boosted Android benchmark performance at Marvell. His recent contributions to the high-profile openjdk/jdk project include low-level AArch64 improvements and instruction innovations, reflecting deep systems expertise. Comfortable moving between research-grade fuzzing discoveries and pragmatic production fixes, he blends rigorous correctness work with performance-driven engineering. He holds dual graduate training in software engineering and computer science from USTC and a software engineering bachelor’s from Xi'an Jiaotong University.
7 years of coding experience
11 years of employment as a software developer
Dual Master's Degree 软件工程/计算机科学, Dual Master's Degree 软件工程/计算机科学 at University of Science and Technology of ChinaBachelor of Engineering Software Engineering, Bachelor of Engineering Software Engineering at Xi'an Jiaotong University
Github Skills (11)
javas10
arm10
openjdk10
jvm10
performance-optimization10
java10
assembly8
algorithms8
data-structures8
algorithm8
data-structure8
Programming languages (2)
Github contributions (5)
openjdk/jdk
Aug 2020 - Oct 2023
JDK main-line development https://openjdk.org/projects/jdk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:130 reviews, 22 PRs, 254 comments in 3 years 2 months
Contributions summary:Pengfei primarily contributed to the optimization and enhancement of the Java Virtual Machine (JVM) for the OpenJDK project. Their work includes fixing a test bug related to file name length limits, introducing an instruction for combined multiply and negation operations for the AArch64 architecture, and optimizing integer divisible by power-of-2 checks. Furthermore, the user refined the AArch64 backend by optimizing division/remainder operations and addressing build failures.
openjdkjavajvmjdk
pfustc/graal
Apr 2019 - Apr 2022
GraalVM: Run Programs Faster Anywhere :rocket:
Contributions:25 pushes, 16 branches in 3 years
anywherefasterrocketprogramsgraalvm
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