The-OpenROAD-Project/OpenROAD
Jan 2025 – Feb 2026
13 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 and refined C++ components for buffer pruning, arithmetic module handling, and hierarchical module replacement, integrating static timing analysis and regression testing to ensure reliability. His work included enhancing slew-aware buffer removal, implementing VT-aware cell selection, and improving test infrastructure for maintainability. Chris applied code refactoring, linting, and documentation updates to strengthen code quality and onboarding. Leveraging C++, Tcl scripting, and build automation, he delivered solutions that improved timing closure, design reliability, and developer productivity across complex EDA workflows.
Overall Statistics
Feature vs Bugs
53%Features
Repository Contributions
192Total
Bugs
42
Commits
192
Features
47
Lines of code
631,279
Activity Months13
Your Network
101 peopleSame Organization
@precisioninno.com14
Shared Repositories
87
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Ahmed R. MohamedMember
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andyfox-rushcMember
arthurjoloMember
arthurMember
Arthur KoucherMember
Augusto BerndtMember
Augusto BerndtMember
Work History
February 2026
9 Commits • 1 Features
Feb 1, 2026February 2026 (The OpenROAD): Delivered targeted enhancements to the Resizer and Slew Estimation path and hardened build/test reliability. Key outcomes include improved performance and maintainability of the estimation logic, enhanced debugging capabilities, and a more stable CI with Bazel regression fixes and journal lifecycle alignment.
9 Commits • 1 Features
Feb 1, 2026February 2026 (The OpenROAD): Delivered targeted enhancements to the Resizer and Slew Estimation path and hardened build/test reliability. Key outcomes include improved performance and maintainability of the estimation logic, enhanced debugging capabilities, and a more stable CI with Bazel regression fixes and journal lifecycle alignment.
February 2026
January 2026
27 Commits • 6 Features
Jan 1, 2026January 2026 Monthly Summary — The-OpenROAD-Project/OpenROAD: Focused on feature refinements, reliability, and code quality to accelerate business value and downstream development. Delivered wire-slew-aware buffer removal, clock_buffer specification support with configuration utilities, and significant master integration improvements. Hardened code quality with clang-tidy and lint fixes, and expanded test coverage alongside documentation updates to improve regression resilience and developer onboarding.
January 2026
27 Commits • 6 Features
Jan 1, 2026January 2026 Monthly Summary — The-OpenROAD-Project/OpenROAD: Focused on feature refinements, reliability, and code quality to accelerate business value and downstream development. Delivered wire-slew-aware buffer removal, clock_buffer specification support with configuration utilities, and significant master integration improvements. Hardened code quality with clang-tidy and lint fixes, and expanded test coverage alongside documentation updates to improve regression resilience and developer onboarding.
December 2025
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for The-OpenROAD-Project/OpenROAD: Delivered critical timing accuracy and reliability enhancements to support design closure and robustness in large-scale routing flows. Implemented slew-aware buffer removal to improve timing estimation accuracy, with added debug instrumentation to trace net estimations and adjustments during buffer operations, enhancing traceability and debugging efficiency. Refactored and stabilized swap operations to improve reliability and memory safety; corrected swap counting in ConcreteSwapArithModules and reorganized doSwapInstances to ensure proper memory management, reducing risk of incorrect state transitions and memory issues. Included Gemini code review fixes to improve maintainability and code quality. Overall, these changes reduce timing uncertainty, improve model fidelity for buffer and swap behaviors, and lower risk during iterative design exploration and regression testing. Technologies/skills demonstrated: C++, complex logic refactoring, debugging instrumentation, memory management, and code review discipline.
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for The-OpenROAD-Project/OpenROAD: Delivered critical timing accuracy and reliability enhancements to support design closure and robustness in large-scale routing flows. Implemented slew-aware buffer removal to improve timing estimation accuracy, with added debug instrumentation to trace net estimations and adjustments during buffer operations, enhancing traceability and debugging efficiency. Refactored and stabilized swap operations to improve reliability and memory safety; corrected swap counting in ConcreteSwapArithModules and reorganized doSwapInstances to ensure proper memory management, reducing risk of incorrect state transitions and memory issues. Included Gemini code review fixes to improve maintainability and code quality. Overall, these changes reduce timing uncertainty, improve model fidelity for buffer and swap behaviors, and lower risk during iterative design exploration and regression testing. Technologies/skills demonstrated: C++, complex logic refactoring, debugging instrumentation, memory management, and code review discipline.
December 2025
November 2025
9 Commits • 4 Features
Nov 1, 2025November 2025 — OpenROAD monthly summary: Delivered business-value improvements across metrics-driven validation, timing reliability, and platform support. Highlights include metrics and flow testing enhancements, CTS tests refactor for buffer insertion and delay analysis, important fixes to resizer and timing repair, a graph traversal efficiency improvement for size-up matching, and broadening C++ compatibility. These efforts improved flow reliability, design performance analysis, and cross-compiler usability, enabling faster QA cycles and safer design closures.
November 2025
9 Commits • 4 Features
Nov 1, 2025November 2025 — OpenROAD monthly summary: Delivered business-value improvements across metrics-driven validation, timing reliability, and platform support. Highlights include metrics and flow testing enhancements, CTS tests refactor for buffer insertion and delay analysis, important fixes to resizer and timing repair, a graph traversal efficiency improvement for size-up matching, and broadening C++ compatibility. These efforts improved flow reliability, design performance analysis, and cross-compiler usability, enabling faster QA cycles and safer design closures.
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
Correctness86.4%
Maintainability86.4%
Architecture82.6%
Performance78.8%
AI Usage22.0%
Skills & Technologies
Programming Languages
BazelC++CMakeDEFJSONMakefileMarkdownNoneOKPython
Technical Skills
API designAlgorithm OptimizationAlgorithm optimizationBackend DevelopmentBug FixingBuild AutomationBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentC++ developmentC++ programmingCI/CD
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline