Xiao Chong Wei

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Hi, this is Xiao(啸xiào) Chong(冲chōng) Wei(魏wèi)!

Currently I am a permenant full time software engineer (infrastructure) @ YScope; was formerly a full time contractor @ Uber (contracted via YScope) with Uber’s Presto team.

I am a MASc (Master of Applied Science, which is research-based and thesis-required) alumni of the Department of Electrical and Computer Engineering (ECE) at the University of Toronto. My supervisor is Ding Yuan. I received my B.Eng. (June 2022) with Honours from Hongyi Hornor Colledge (Computer Science and Technology) at Wuhan University (with GPA 3.94/4.0, the top 3 of the school). My research interests include performance and failure diagnosis and optimization in large-scale software systems.

When I have time, I usually play the guitar, play video games, cook, or practice competitive algorithm contests.

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News

28/08/2025 Check out our latest blog on CLP integrated with Presto! 🥳

We’re excited to share our latest deep-dive: “Querying CLP-compressed logs with SQL via Presto”. In this post, we walk through how we built a CLP connector for Presto, enabling users to query CLP-compressed logs directly with SQL—without the need for decompression. I’m especially grateful to my team for giving me the opportunity to make an impact on this project. I was able to spearhead several subprojects, including pushdown generation optimization, streaming and S3 support, end-to-end CI automation, and cloud-native integration. Each of these efforts has been a huge learning experience and has helped me gain valuable skills along the way.

Read the full story 📖 in our blog post!

30/07/2025 Check out our latest project: Log Archival Bench (LAB)! 🥳

We’re excited to introduce Log Archival Bench (LAB) — a benchmark designed to evaluate log archival and analytics performance across ClickHouse, CLP, Elasticsearch, Presto, and SparkSQL.

I was one of the primary contributors to the initial prototype of this project during its early closed-source phase. It’s been an incredibly rewarding experience working with state-of-the-art data engines and gaining a clearer sense of where we stand.

Huge thanks to Abby and John for refining the UI and benchmark code, ultimately helping us open-source the project.

Read the full story 📖 in our blog post!

Selected Experiences

10/2024-Present SWE Permanent Full Time @ YScope & SWE Contract Full Time @ Uber (Presto team)

As I mentioned, my supervisor is a great entrepreneur as well. So I joined his startup as I finished my thesis defense. It is a great honor to work with so many amazing people (because most of my colleagues are from our research group). I am responsible for various things but mainly focus on Presto-CLP (see more about CLP here) Velox-CLP connector.

I was also a full time contractor working for Uber Presto team. I am also an active OSS contributor of Presto and Velox repository, helping to implement features and fix bugs.

09/2022-09/2024 Research Fellow and Teaching Assistant @ University of Toronto (UTSG Campus)

My academia supervisor is Prof. Ding Yuan, who is one of the best researchers in the operating system community and also a great entrepreneur. My research project and thesis are related to performance diagnosing for large-scale system software (since it has not been published yet, I can’t tell more details :p), which gains me a lot of database system, programming language and compiler experiences.

During my master, I was teaching various undergrad courses, including ECE244 (Programming Fundamentals), ECE344 (Operating System) and ECE454 (Computer Architecture) etc., which helped me to solid what I had learned during my own undergrad :p

01/2021-05/2022 Android SWE Internship @ ByteDance

Responsible for Android client development of Tik Tok in China. I have got involved in processing 13 business features and 2 technical features with 0 online accidents, and produced more than 20 technical documents, which have been read by more than thousands of internal employees. I also developed an Android Studio plugin to automate checking data serialization/deserialization which was downloaded by more than 5,000 users across the company.

Honors & Awards