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Mike Hommey

PROFILE

Mike Hommey

Worked across repositories such as mozilla/sccache, espressif/llvm-project, microsoft/git, mozilla/neqo, and mozilla/gecko-dev to deliver targeted improvements in build systems, reliability, and performance. Addressed concurrency and memory management issues in Rust and C, including fixing AddressSanitizer error handling on Windows and refactoring sccache’s jobserver to prevent deadlocks. Enhanced coverage export performance in espressif/llvm-project by optimizing iteration logic in C++, and centralized build configuration for mozilla/neqo using Rust. Improved CI reliability in mozilla/gecko-dev by correcting base reference calculations for git-cinnabar workflows. Demonstrated strengths in system programming, configuration management, and cross-repository debugging using C, Rust, and Python.

Overall Statistics

Feature vs Bugs

29%Features

Repository Contributions

8Total
Bugs
5
Commits
8
Features
2
Lines of code
321
Activity Months4

Work History

June 2025

2 Commits

Jun 1, 2025

June 2025 monthly summary (mozilla/gecko-dev): Key features delivered: improved reliability of try push base ref calculation by correctly handling GitHub as a remote and normalizing trailing slashes in the try URL for git-cinnabar. This change reduces misbase errors and outdated-remote skew in CI. Major bugs fixed: Bug 1971469 - Fix miscalculation of base ref for try pushes when using git-cinnabar by ensuring the GitHub repository is treated as a remote and correcting trailing slash handling in the try URL. Commits addressing this work: 486b7d9cb41e992e27770b31f377720597b4a187; 06e9eab12cecdae027c283a7be222dbb19c7b5f7. Overall impact and accomplishments: Improved CI reliability for cross-repo workflows, reduced false negatives in try builds, smoother integration with git-cinnabar. Technologies/skills demonstrated: cross-repo remote handling, git-cinnabar integration, URL normalization, VCS debugging, CI reliability improvements.

February 2025

1 Commits • 1 Features

Feb 1, 2025

Concise monthly summary for 2025-02 highlighting key deliverables, impact, and technical growth for mozilla/neqo.

January 2025

3 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary focusing on business value delivered through targeted feature work, bug fixes, and reliability improvements across three repositories: espressif/llvm-project, microsoft/git, and mozilla/sccache.

December 2024

2 Commits

Dec 1, 2024

December 2024: Focused on reliability and build-system robustness across espressif/llvm-project and mozilla/sccache. Delivered two high-impact fixes that improve Windows sanitizer behavior and parallel build stability, delivering business value through more reliable CI feedback and faster, predictable builds.

Activity

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Quality Metrics

Correctness87.6%
Maintainability80.0%
Architecture80.0%
Performance75.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

CC++PythonRust

Technical Skills

Build SystemBuild SystemsC programmingCode RefactoringCode refactoringCompiler OptimizationCompiler ToolsCompiler warningsConcurrencyConfiguration ManagementError HandlingGitMemory ManagementPerformance OptimizationProfile Data Analysis

Repositories Contributed To

5 repos

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

espressif/llvm-project

Dec 2024 Jan 2025
2 Months active

Languages Used

C++

Technical Skills

Error HandlingMemory ManagementWindows APICode RefactoringCompiler ToolsPerformance Optimization

mozilla/sccache

Dec 2024 Jan 2025
2 Months active

Languages Used

CRustC++

Technical Skills

Build SystemsConcurrencyRustSystem ProgrammingCompiler OptimizationRust Programming

mozilla/gecko-dev

Jun 2025 Jun 2025
1 Month active

Languages Used

Python

Technical Skills

GitPython DevelopmentVersion Control

microsoft/git

Jan 2025 Jan 2025
1 Month active

Languages Used

C

Technical Skills

C programmingCode refactoringCompiler warnings

mozilla/neqo

Feb 2025 Feb 2025
1 Month active

Languages Used

Rust

Technical Skills

Build SystemConfiguration ManagementRust