Duncan Smith
Canada
Summary
🤩
Rockstar🎓
Top SchoolDuncan Smith is a seasoned compiler engineer and technical leader with 14 years of experience designing and optimizing compilers, link-time optimization, and the C++ standard library, including significant contributions to LLVM/Clang and libc++ repositories. At Apple he led and managed Clang frontend teams, drove LTO scalability (notable multix memory and link-time improvements), and researched content-addressable storage for persistent compilation caching. He blends deep systems-level C/C++ expertise and rigorous testing with practical productization experience across compiler SDK tooling and developer workflows. An active open-source contributor, his patches span regex, memory allocation, PGO, and header-map robustness in widely used projects such as LLVM/Clang. Trained as both a computer engineer and musician, he brings a methodical, detail-oriented approach informed by musical study to complex engineering problems.
14 years of coding experience
21 years of employment as a software developer
BASc Computer, BASc Computer at University of TorontoVoice, Voice at The Royal Conservatory of Music
English
Github Skills (19)
c-language10
compiler-development10
testing10
compiler-design10
compiler-compiler10
compiler10
clangd10
cprogramming-language10
clang10
memory-allocation9
performance-monitor9
unit-testing9
performance-analysis9
regular-expression9
test-automation8
Programming languages (7)
Github contributions (5)
apple/swift-clang
Feb 2016 - Aug 2019
Role in this project:
Backend Developer
Backend DeveloperContributions:56 commits, 2 PRs, 26 pushes in 3 years 6 months
Contributions summary:Duncan primarily contributed to the `apple/swift-clang` repository by modifying the header map functionality. Their work involved removing and adding features, such as the copy constructor and unit tests, and refactoring code. The modifications focused on improving the reliability and robustness of the header map within the clang compiler.
llvm-mirror/clang
Dec 2013 - Aug 2019
Mirror kept for legacy. Moved to https://github.com/llvm/llvm-project
Role in this project:Back-end Developer
Back-end DeveloperContributions:168 commits in 5 years 9 months
Contributions summary:Duncan primarily contributed to the clang compiler project by addressing bugs and improving code quality. Their work includes fixing issues related to ASM input constraints and optimizing the handling of Profile-Guided Optimization (PGO) counters. The user demonstrated proficiency in C/C++ compiler development, as evidenced by their contributions to the codebase and their focus on improving specific compiler behaviors and functionality.
keptwindowsllvmcc-plus-plus
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