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Kershaw Chang

PROFILE

Kershaw Chang

Worked on core networking components in mozilla/gecko-dev and mozilla/neqo, focusing on reliability, maintainability, and error handling. Delivered centralized HTTP/2 stream management by introducing Http2StreamQueueManager and refactoring session logic, using C++ and memory-safety techniques like WeakPtr to prevent crashes. Enhanced DNS cache correctness for CORS with proxy-aware logic, improved HTTP/2 WebSocket fallback, and aligned HTTP/3 timing metrics, all supported by expanded test coverage. In mozilla/neqo, strengthened IO error propagation by updating the send path with try_send and improved test reliability. Demonstrated expertise in C++, JavaScript, and network protocol implementation while prioritizing robust, maintainable code.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

20Total
Bugs
3
Commits
20
Features
3
Lines of code
1,939
Activity Months3

Work History

July 2025

2 Commits • 1 Features

Jul 1, 2025

Summary for 2025-07: Delivered centralized HTTP/2 stream management and memory-safety improvements in mozilla/gecko-dev, addressing Bug 1974155. The changes introduce Http2StreamQueueManager to encapsulate stream queues, refactor Http2Session to use the new manager, and switch critical pointers to WeakPtr to prevent dangling references. These technical changes reduce crash risk and improve reliability under high-load HTTP/2 traffic, while strengthening maintainability for future enhancements. Demonstrated strong C++ design, code quality, and cross-review collaboration.

June 2025

17 Commits • 1 Features

Jun 1, 2025

June 2025: Achieved stability and value across the network stack in mozilla/gecko-dev. Implemented CORS DNS cache correctness with proxy-aware behavior; added robust HTTP/2 WebSocket/extended CONNECT fallback to HTTP/1.1 with tests; aligned HTTP/3 timing metrics and added tests; performed internal stability improvements including TRR refactor, HTTP proxy telemetry cleanup, and HTTP/2 session cleanup hooks. These changes reduce DNS lookups in proxied scenarios, improve connectivity in constrained environments, and enhance reliability and maintainability of the networking stack.

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024: Delivered a critical enhancement to the IO send path in mozilla/neqo by enabling try_send in send_inner and propagating IO errors to callers. This change, supported by updated tests, strengthens error visibility and upstream handling, reducing silent failures and improving reliability in error scenarios. The work focused on improving system resilience and aligns with the team's error-management strategy across the repository.

Activity

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Quality Metrics

Correctness88.0%
Maintainability82.0%
Architecture79.4%
Performance76.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++IDLJavaScriptPythonRustYAML

Technical Skills

Bug FixingBuild SystemsC++C++ DevelopmentCache ManagementCachingCode RefactoringCross-Origin Resource Sharing (CORS)DNSDNS CachingDNS ResolutionDebuggingError HandlingHTTP ProtocolHTTP/2

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

mozilla/gecko-dev

Jun 2025 Jul 2025
2 Months active

Languages Used

C++IDLJavaScriptPythonYAML

Technical Skills

Bug FixingBuild SystemsC++C++ DevelopmentCache ManagementCaching

mozilla/neqo

Nov 2024 Nov 2024
1 Month active

Languages Used

Rust

Technical Skills

Error HandlingNetworking