Arthur O'dwyer
Senior Staff Engineer at Nominum
Village of Irvington, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolArthur O'dwyer is a Senior Staff Engineer with 15+ years of deep C, C++, and Python experience, specializing in low-level platform and library design, compilers, and automatic test-case generation. He drives performance and correctness in large systems—authoring JSON and logging libraries, a JSON column type and Unicode collation for a distributed SQL database, and work across event analytics at 1,100-machine scale. A prolific open-source contributor, his patches have been accepted into major projects including GCC, Clang, MySQL, Postgres and the widely used uthash and folly libraries, where he modernized APIs and improved performance. He’s a seasoned C++ evangelist and speaker (CppCon, C++Now, Silicon Valley Code Camp) who also organized the San Francisco C++ Meetup for four years and offers Modern C++ training. Less obvious: he combines compiler- and toolchain-level expertise with practical SRE and build-system improvements, making him equally comfortable reducing elusive compiler bugs and stabilizing production fleets.
15 years of coding experience
9 years of employment as a software developer
BS, Computer Science, BS, Computer Science at Carnegie Mellon University
English, Spanish, chinese, mandarin
Github Skills (25)
algorithm10
algorithms10
c-language10
c-programming10
data-structure10
googletest10
optmization10
optimisation10
performance-optimization10
hashtable10
data-structures10
folly10
cprogramming-language10
optimization10
test-automation10
Programming languages (25)
Github contributions (5)
troydhanson/uthash
Jun 2015 - Dec 2022
C macros for hash tables and more
Role in this project:
Back-end Developer
Back-end DeveloperContributions:15 reviews, 123 commits, 100 PRs in 7 years 6 months
Contributions summary:Arthur made significant contributions to the `uthash` library, focusing on enhancing its core functionality. These contributions included adding new macros for improved hash value calculation and lookups, optimizing existing code for performance gains, and refactoring internal logic for clarity. The user also fixed bugs, improved code style, and addressed compiler warnings, demonstrating a commitment to code quality and maintainability. This work involved API-breaking changes, suggesting a role in feature implementation and library evolution.
hashtable
facebook/folly
Oct 2016 - Mar 2017
An open-source C++ library developed and used at Facebook.
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 2 commits, 10 PRs in 5 months
Contributions summary:Arthur primarily contributes to the `folly` library, focusing on improving its core components and optimizing performance. They refactor code to improve efficiency and incorporate modern C++ features, as seen in the hazptr and small_vector modifications. The user addresses correctness issues and enhances existing functionalities by providing fixes and modernizing code conventions. They also introduce optimizations like using `std::is_trivially_relocatable` where available to improve codegen.
cpp
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