Yibo Cai
Principal Software Engineer at ARM
Minhang District, Shanghai, China
Summary
🤩
Rockstar🎓
Top SchoolYibo Cai is a Principal Software Engineer with two decades of software development experience and over a decade in senior engineering roles, currently driving performance and storage/cloud optimizations at ARM from Shanghai. He combines deep computer-architecture knowledge with hands-on mastery across kernels, embedded systems, networking, virtualization and databases, and has a track record of low-level optimizations that leverage SIMD, ARM64 extensions and CPU-specific features. A seasoned open-source contributor and Apache Arrow PMC committer, he has made performance-critical contributions to projects like Apache Arrow, ScyllaDB and Seastar, improving JSON handling, sorting kernels, CRC and UTF-8 routines and DPDK/ARM64 support. Previously he worked on Linux kernel and SoC firmware at Qualcomm and led embedded consumer-electronics teams, giving him a rare breadth from ROM code to cloud-native deployments. Known for pragmatic profiling and systems-level debugging, he often finds performance wins by aligning algorithms to hardware realities rather than relying solely on higher-level refactors.
13 years of coding experience
6 years of employment as a software developer
Master of Science (MS) Communication and information system, Master of Science (MS) Communication and information system at Shanghai Jiao Tong University
Chinese, English
Github Skills (35)
algorithm10
algorithms10
performance-monitor10
performance-analytics10
c-language10
async10
crc10
networking10
data-structure10
performance-measurement10
apache-arrow10
performance-analysis10
seastar10
sse10
performance-optimization10
Programming languages (15)
Github contributions (5)
apache/arrow
Dec 2019 - Jan 2023
Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics
Role in this project:
Back-end Developer
Back-end DeveloperContributions:713 reviews, 134 commits, 225 PRs in 3 years 1 month
Contributions summary:Yibo primarily contributed to the development and optimization of the Apache Arrow C++ library, focusing on improving performance and addressing specific issues. Their contributions included fixing whitespace detection and character length errors in JSON and Gandiva components, enabling Neon support in Rapidjson, and refining the CpuInfo singleton. They also implemented and optimized small integer sorting using counting sort, and added features such as validation for sorting stability and implementing the nth_to_indices kernel.
memorymulti-languagetoolboxacceleratedarrow
xtensor-stack/xsimd
Sep 2021 - Oct 2022
C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE))
Role in this project:Backend Developer
Backend DeveloperContributions:47 reviews, 19 commits, 20 PRs in 1 year 1 month
Contributions summary:Yibo primarily focused on improving the build process and fixing build errors related to the xsimd library. Their contributions included addressing issues specific to the AVX512, Arm64, and SSE architectures, along with resolving build problems encountered with various compilers, including MSVC and Mingw32. The user also added a missing header, corrected `ptrdiff_t` issues, and improved existing code by leveraging the `_mm_lddqu_si128` intrinsic for SSE3 and above. Furthermore, the user implemented scatter and gather operations and fixed several build warnings.
avxsimdcppavx512simd-intrinsics
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