David Degazio
WebAssembly Virtual Machine Compiler Engineer at Apple
San Francisco, California, United States
Summary
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Rockstar🎓
Top SchoolDavid Degazio is a WebAssembly virtual machine and compiler engineer with seven years of systems and VM work experience, currently contributing to JavaScriptCore at Apple. He has deep hands-on experience diagnosing JDK regressions and improving VM performance from his time on the Twitter VM team, including SIMD and GC optimizations implemented during internships. Comfortable across compiler internals, garbage collectors, and low-level performance tuning, he pairs academic grounding from the University of Michigan with practical production impact. Colleagues would describe him as a "compiler creature"—someone who enjoys diving into bytecode, tooling, and microarchitectural trade-offs to squeeze out reliable speedups.
6 years of coding experience
1 year of employment as a software developer
Bachelor's degree, Computer Science, Junior, Bachelor's degree, Computer Science, Junior at University of Michigan College of Engineering
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (21)
javascript10
ios10
safari10
linux10
browser10
webkit10
gtk10
macos10
specification8
optimizer7
emscripten6
webassembly6
toolchain5
interpreter4
wpe4
Programming languages (3)
Github contributions (5)
ddegazio/WebKit
Aug 2022 - Apr 2025
Home of the WebKit project, the browser engine used by Safari, Mail, App Store and many other applications on macOS, iOS and Linux.
Contributions:377 pushes, 150 branches in 2 years 7 months
safarimailmail-appbrowserapp-store
WebKit/WebKit
Aug 2022 - Aug 2022
Home of the WebKit project, the browser engine used by Safari, Mail, App Store and many other applications on macOS, iOS and Linux.
Contributions:222 reviews, 4 commits, 145 PRs in 5 days
safarimailmail-appbrowserapp-store
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