The-OpenROAD-Project/OpenROAD
Jan 2025 – Sep 2025
9 Months active
Languages Used
C++CMakeTclJSONMarkdownShellTexttext
Technical Skills
Build System ConfigurationC++ DevelopmentCode FormattingCode RefactoringConfiguration ManagementDigital Design
Cho Moon
PROFILE
Cho Moon
Chris Moon contributed to The-OpenROAD-Project/OpenROAD by engineering robust timing optimization and module swapping features for digital design automation. He developed automated module swapping and VT-aware cell selection, integrating C++ and Tcl scripting to enhance timing closure and design reliability. His work included refining hierarchical module replacement, improving slack calculations, and implementing buffer pruning controls, all while maintaining code quality through static analysis, regression testing, and documentation updates. By addressing complex issues such as cache invalidation, test determinism, and API const correctness, Chris delivered maintainable, production-ready solutions that improved the accuracy, reliability, and scalability of the OpenROAD workflow.
Overall Statistics
Feature vs Bugs
54%Features
Repository Contributions
144Total
Bugs
29
Commits
144
Features
34
Lines of code
410,197
Activity Months9
Your Network
84 people
Work History
September 2025
15 Commits • 3 Features
Sep 1, 2025September 2025 monthly summary for The-OpenROAD-Project/OpenROAD: Delivered measurable improvements in timing reliability and setup-time closure through VT swap, strengthened repair-timing workflow with better slack handling and test alignment, and expanded test infrastructure. Also fixed key issues affecting correctness and maintenance, including skip_pin_swap propagation in repair_timing and arithmetic module swapping, complemented by code quality cleanup.
15 Commits • 3 Features
Sep 1, 2025September 2025 monthly summary for The-OpenROAD-Project/OpenROAD: Delivered measurable improvements in timing reliability and setup-time closure through VT swap, strengthened repair-timing workflow with better slack handling and test alignment, and expanded test infrastructure. Also fixed key issues affecting correctness and maintenance, including skip_pin_swap propagation in repair_timing and arithmetic module swapping, complemented by code quality cleanup.
September 2025
August 2025
17 Commits • 4 Features
Aug 1, 2025August 2025 highlights for The OpenROAD project: Delivered key features to improve hold-fix accuracy, VT-aware reporting, and setup-fixing transforms, with reinforced test coverage and documentation. These efforts enhanced timing-closure reliability, clarity of results, and maintainability, while upholding code quality through targeted static analysis and formatting improvements.
August 2025
17 Commits • 4 Features
Aug 1, 2025August 2025 highlights for The OpenROAD project: Delivered key features to improve hold-fix accuracy, VT-aware reporting, and setup-fixing transforms, with reinforced test coverage and documentation. These efforts enhanced timing-closure reliability, clarity of results, and maintainability, while upholding code quality through targeted static analysis and formatting improvements.
July 2025
6 Commits • 1 Features
Jul 1, 2025July 2025 (2025-07) monthly summary for The OpenROAD Project. Delivered a new Buffer Pruning Control with a safe default disablement across design tools, enabling user-controlled disable_buffer_pruning during design repair and timing optimization. Implemented across config APIs (set_opt_config, reset_opt_config, report_opt_config) with default disabled to minimize unintended changes. Also improved lint/test hygiene around buffer pruning to reduce confusion and prevent regressions. These changes reduce risk in optimization workflows, improve test reliability and log clarity, and establish a solid foundation for broader adoption of pruning controls.
6 Commits • 1 Features
Jul 1, 2025July 2025 (2025-07) monthly summary for The OpenROAD Project. Delivered a new Buffer Pruning Control with a safe default disablement across design tools, enabling user-controlled disable_buffer_pruning during design repair and timing optimization. Implemented across config APIs (set_opt_config, reset_opt_config, report_opt_config) with default disabled to minimize unintended changes. Also improved lint/test hygiene around buffer pruning to reduce confusion and prevent regressions. These changes reduce risk in optimization workflows, improve test reliability and log clarity, and establish a solid foundation for broader adoption of pruning controls.
July 2025
June 2025
22 Commits • 7 Features
Jun 1, 2025June 2025 monthly summary for The-OpenROAD-Project/OpenROAD. Focused on delivering high-value features, hardening code quality, and improving reliability with targeted performance opts and better documentation. Highlights include new arithmetic module behavior, safer APIs, configurable CTS options, and strengthened test/docs coverage—driven by code review feedback and rigorous linting/formatting.
June 2025
22 Commits • 7 Features
Jun 1, 2025June 2025 monthly summary for The-OpenROAD-Project/OpenROAD. Focused on delivering high-value features, hardening code quality, and improving reliability with targeted performance opts and better documentation. Highlights include new arithmetic module behavior, safer APIs, configurable CTS options, and strengthened test/docs coverage—driven by code review feedback and rigorous linting/formatting.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for The-OpenROAD-Project/OpenROAD. Delivered key timing-focused module swapping enhancements and robustness fixes, driving stability and performance in the design flow.
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for The-OpenROAD-Project/OpenROAD. Delivered key timing-focused module swapping enhancements and robustness fixes, driving stability and performance in the design flow.
May 2025
April 2025
6 Commits • 1 Features
Apr 1, 2025Month: 2025-04 Overview: Two high-impact outcomes in The-OpenROAD-Project/OpenROAD: (1) feature enhancements to hierarchical module replacement with improved net reconnection and parasitic estimation; (2) bug fixes and journaling improvements for dbModBTerm to modNet connections. Both delivered with code health improvements (refactors, formatting) that reinforce reliability, traceability, and maintainability of the design flow. Key features delivered: - Hierarchical module replacement robustness and nets reconnection: added clear cache invalidation after netlist changes, integrated reverse swapping in replace_hier_mod1, and strengthened swap logic to reconnect nets on replacement; parasitic estimation improvements associated with hierarchical modifications. - Journal logging correctness for dbModBTerm to modNet connections: fixed parameter handling, improved debugging output, and cleanup of journaling changes; includes a Coverity-oriented fixes and revert of extraneous journal changes. Major bugs fixed: - Fixed a bug in journal dbbterm connect for mod net; enhanced reliability and reduced risk of incorrect net connections during netlist updates; addressed static analysis concerns (Coverity fix). Overall impact and accomplishments: - Increased reliability of hierarchical replacements, minimizing stale data caches and ensuring nets are consistently reconnected after replacements. - Improved traceability and debuggability through corrected journaling and enhanced logging, accelerating issue diagnosis in complex netlists. - Strengthened code health via targeted refactors (e.g., dbModInst::swapMaster) and formatting fixes, supporting long-term maintainability. - Demonstrated end-to-end impact: faster, more reliable design modifications with clearer audit trails, enabling smoother production workflows. Technologies/skills demonstrated: - C++ code changes and refactoring (swapMaster), design improvements in hierarchical replacement, and tooling hygiene (clang-format). - Debugging, testing, and static analysis readiness (parsing journals, Coverity fixes). - Collaboration and code-review integration (incorporation of feedback from colleagues).
April 2025
6 Commits • 1 Features
Apr 1, 2025Month: 2025-04 Overview: Two high-impact outcomes in The-OpenROAD-Project/OpenROAD: (1) feature enhancements to hierarchical module replacement with improved net reconnection and parasitic estimation; (2) bug fixes and journaling improvements for dbModBTerm to modNet connections. Both delivered with code health improvements (refactors, formatting) that reinforce reliability, traceability, and maintainability of the design flow. Key features delivered: - Hierarchical module replacement robustness and nets reconnection: added clear cache invalidation after netlist changes, integrated reverse swapping in replace_hier_mod1, and strengthened swap logic to reconnect nets on replacement; parasitic estimation improvements associated with hierarchical modifications. - Journal logging correctness for dbModBTerm to modNet connections: fixed parameter handling, improved debugging output, and cleanup of journaling changes; includes a Coverity-oriented fixes and revert of extraneous journal changes. Major bugs fixed: - Fixed a bug in journal dbbterm connect for mod net; enhanced reliability and reduced risk of incorrect net connections during netlist updates; addressed static analysis concerns (Coverity fix). Overall impact and accomplishments: - Increased reliability of hierarchical replacements, minimizing stale data caches and ensuring nets are consistently reconnected after replacements. - Improved traceability and debuggability through corrected journaling and enhanced logging, accelerating issue diagnosis in complex netlists. - Strengthened code health via targeted refactors (e.g., dbModInst::swapMaster) and formatting fixes, supporting long-term maintainability. - Demonstrated end-to-end impact: faster, more reliable design modifications with clearer audit trails, enabling smoother production workflows. Technologies/skills demonstrated: - C++ code changes and refactoring (swapMaster), design improvements in hierarchical replacement, and tooling hygiene (clang-format). - Debugging, testing, and static analysis readiness (parsing journals, Coverity fixes). - Collaboration and code-review integration (incorporation of feedback from colleagues).
March 2025
26 Commits • 6 Features
Mar 1, 2025March 2025 monthly summary for The OpenROAD project focused on strengthening the design reliability, modularity, and code quality of the OpenROAD workflow. The month delivered concrete features that enhance design boundaries, a framework for safe module swaps, and utilities that improve repair flows, while also tightening the codebase through formatting and maintenance efforts. Key outcomes include a tightened default sizing policy with regression coverage, groundwork for future modular swaps, and an enhanced reporting capability, all contributing to a more robust and scalable design flow.
26 Commits • 6 Features
Mar 1, 2025March 2025 monthly summary for The OpenROAD project focused on strengthening the design reliability, modularity, and code quality of the OpenROAD workflow. The month delivered concrete features that enhance design boundaries, a framework for safe module swaps, and utilities that improve repair flows, while also tightening the codebase through formatting and maintenance efforts. Key outcomes include a tightened default sizing policy with regression coverage, groundwork for future modular swaps, and an enhanced reporting capability, all contributing to a more robust and scalable design flow.
March 2025
February 2025
41 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for The-OpenROAD-Project/OpenROAD focusing on delivering high-value features, stabilizing the codebase, and improving developer productivity. Key outcomes include architectural usability enhancements, targeted regression fixes, and a strong emphasis on code quality and maintainability.
February 2025
41 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for The-OpenROAD-Project/OpenROAD focusing on delivering high-value features, stabilizing the codebase, and improving developer productivity. Key outcomes include architectural usability enhancements, targeted regression fixes, and a strong emphasis on code quality and maintainability.
January 2025
7 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for The-OpenROAD-Project/OpenROAD focused on robustness, reliability, and maintainability enhancements in module swap workflows and test infrastructure. Delivered key features with OpenSTA integration, standardized test output, and reinforced code quality practices to enable faster, safer changes and more dependable builds.
7 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for The-OpenROAD-Project/OpenROAD focused on robustness, reliability, and maintainability enhancements in module swap workflows and test infrastructure. Delivered key features with OpenSTA integration, standardized test output, and reinforced code quality practices to enable faster, safer changes and more dependable builds.
January 2025
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Quality Metrics
Correctness86.0%
Maintainability86.6%
Architecture81.6%
Performance76.6%
AI Usage20.6%
Skills & Technologies
Programming Languages
C++CMakeDEFJSONMakefileMarkdownPythonShellSystemVerilogTOML
Technical Skills
API designAlgorithm OptimizationBackend DevelopmentBug FixingBuild AutomationBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentC++ developmentCI/CDCMakeCache Management
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