eclipse-sumo/sumo
Jan 2025 – Nov 2025
11 Months active
Languages Used
C++PythonTextBatchC#CMakeDebian packagingJenkinsfile
Technical Skills
Build AutomationC++CI/CDCode RefactoringCommand-line InterfaceDependency Management
Michael Behrisch
PROFILE
Michael Behrisch
Michael Behrisch contributed to the eclipse-sumo/sumo repository by engineering robust data export, build automation, and simulation features that improved reliability and cross-platform support. He developed and integrated Parquet and CSV data pipelines using C++ and Python, enabling analytics-ready outputs and streamlined downstream workflows. Michael enhanced CI/CD pipelines, stabilized nightly builds, and expanded compatibility across Windows, Linux, and macOS by refining CMake configurations and Docker environments. His work included localization, advanced test automation, and packaging improvements, addressing both feature delivery and bug resolution. These efforts resulted in more maintainable code, faster feedback cycles, and higher-quality simulation and analytics artifacts.
Overall Statistics
Feature vs Bugs
56%Features
Repository Contributions
647Total
Bugs
163
Commits
647
Features
206
Lines of code
319,418
Activity Months11
Your Network
68 people
Work History
November 2025
9 Commits • 2 Features
Nov 1, 2025November 2025 – eclipse-sumo/sumo: Delivered data-IO and visualization enhancements, alongside stability improvements that broaden build capabilities and reduce deployment risk. The work focused on expanding format support, improving cross-platform packaging, and elevating local/CI debugging visibility to accelerate delivery of reliable artifacts for analytics and simulations.
9 Commits • 2 Features
Nov 1, 2025November 2025 – eclipse-sumo/sumo: Delivered data-IO and visualization enhancements, alongside stability improvements that broaden build capabilities and reduce deployment risk. The work focused on expanding format support, improving cross-platform packaging, and elevating local/CI debugging visibility to accelerate delivery of reliable artifacts for analytics and simulations.
November 2025
October 2025
81 Commits • 25 Features
Oct 1, 2025October 2025 — Delivered business value through robust Visum tooling, localization, and reliability improvements across the eclipse-sumo/sumo repository. The work focused on expanding capabilities for data export, improving stability, and enabling broader user adoption through language support and packaging/pipeline enhancements.
October 2025
81 Commits • 25 Features
Oct 1, 2025October 2025 — Delivered business value through robust Visum tooling, localization, and reliability improvements across the eclipse-sumo/sumo repository. The work focused on expanding capabilities for data export, improving stability, and enabling broader user adoption through language support and packaging/pipeline enhancements.
September 2025
66 Commits • 19 Features
Sep 1, 2025September 2025 was marked by substantial stability and quality improvements in eclipse-sumo/sumo. Key build and CI hardening reduced noise and accelerated feedback across Windows, macOS, and Linux pipelines. We delivered feature enhancements (no-bindings build, wheel build output visibility) while modernizing dependencies and aligning with cross‑platform requirements (Jupedsim 1.3.1 for macOS, dependency updates, and Java version fixes). Significant bug fixes to suppress noisy Arrow warnings, annotate MSVC switch-case fallthrough, fix duplicate calls, and improve encoding and style, plus CI/workflow refinements, improved end-user stability and developer productivity. These changes reduce flaky CI, speed up feedback loops, and enable smoother releases with more maintainable codebases.
66 Commits • 19 Features
Sep 1, 2025September 2025 was marked by substantial stability and quality improvements in eclipse-sumo/sumo. Key build and CI hardening reduced noise and accelerated feedback across Windows, macOS, and Linux pipelines. We delivered feature enhancements (no-bindings build, wheel build output visibility) while modernizing dependencies and aligning with cross‑platform requirements (Jupedsim 1.3.1 for macOS, dependency updates, and Java version fixes). Significant bug fixes to suppress noisy Arrow warnings, annotate MSVC switch-case fallthrough, fix duplicate calls, and improve encoding and style, plus CI/workflow refinements, improved end-user stability and developer productivity. These changes reduce flaky CI, speed up feedback loops, and enable smoother releases with more maintainable codebases.
September 2025
August 2025
23 Commits • 8 Features
Aug 1, 2025August 2025 monthly summary for eclipse-sumo/sumo: Key features delivered: - Issue Update Tool: Added to streamline issue management and reduce triage time (commit 48e8d6be372550078e1573b6a7db405f52558f15). - CMake Version Compatibility Updates: Patches to support older CMake versions, enabling builds in legacy environments (commits 480e7b0e233580860890991145029d8a8a60158d and 1921766b06bf1b2b87715c21137b1e664072e7f1). - Parquet Support in Dockerfile: Parquet integration in container images to support parquet-based workflows (commit 2c3c02fdafcfdc704aebfc98375fbdec7cb66a70). - Speaking Names for Builds: Improved build naming for clearer build provenance (commit 91d21570f74befd4b8fd7f22a6a8ffaf738a63e0). - CI readiness and consistency improvements: Readiness for Windows 2025 switch and consistent CI environment (“ubuntu-latest”) usage (commits 0db48985a67432d7cce5397d4322fab8157e6152, 66b891349b978748fd05b061a392f59165dfc6ad, 829e99c375f123bfebcd304034494a974b0bb65c). Major bugs fixed: - Typo Fix in UI/Text: Resolved a UI typo referenced in issue #22 (commit 7c3348f0460e365c21c876846f5e91d878faa984). - Nightly Build Stabilization: Stabilized nightly builds to reduce flaky failures (commit 789b0a940ef5549608665dceeaf48c5e3e57cebd). - CI/Non-functional Free-Threaded Build Test Disablement: Disabled tests for non-functional free-threaded builds to stabilize CI (commit da5d85d4917dd83ad881096f26077a901ab9a383). - OpenGL Warning Filtering: Filter OpenGL warnings on Windows test server to improve test reliability (commit 0c46112c127cb41c1519fba104cf9b879815ab23). - Clang Build Fixes: Resolved clang build issues to restore clean builds (commit 77653dddbe3d7d41d3a7fa529dce37f94e436846). Overall impact and accomplishments: - Significantly improved product reliability and developer productivity through feature delivery, stability improvements, and build hygiene across Windows, Linux, and Docker environments. The Issue Update Tool and build-name enhancements reduce triage time and improve traceability. CMake compatibility patches expand reach into legacy environments, while Parquet Docker support enables data-workflow pipelines. The CI readiness activities position the project for a smoother Windows 2025 transition with more predictable, quieter builds. Technologies/skills demonstrated: - Cross-platform build engineering (CMake, Clang, Windows/Linux CI, ubuntu-latest CI use). - Container and data-workflow capabilities (Dockerfile Parquet support). - Build hygiene and quality improvements (warning reductions, code style enforcement). - CI pipeline stabilization (nightly builds, test enablement/disablement, OpenGL warning handling). - Clear build provenance and naming for easier traceability.
August 2025
23 Commits • 8 Features
Aug 1, 2025August 2025 monthly summary for eclipse-sumo/sumo: Key features delivered: - Issue Update Tool: Added to streamline issue management and reduce triage time (commit 48e8d6be372550078e1573b6a7db405f52558f15). - CMake Version Compatibility Updates: Patches to support older CMake versions, enabling builds in legacy environments (commits 480e7b0e233580860890991145029d8a8a60158d and 1921766b06bf1b2b87715c21137b1e664072e7f1). - Parquet Support in Dockerfile: Parquet integration in container images to support parquet-based workflows (commit 2c3c02fdafcfdc704aebfc98375fbdec7cb66a70). - Speaking Names for Builds: Improved build naming for clearer build provenance (commit 91d21570f74befd4b8fd7f22a6a8ffaf738a63e0). - CI readiness and consistency improvements: Readiness for Windows 2025 switch and consistent CI environment (“ubuntu-latest”) usage (commits 0db48985a67432d7cce5397d4322fab8157e6152, 66b891349b978748fd05b061a392f59165dfc6ad, 829e99c375f123bfebcd304034494a974b0bb65c). Major bugs fixed: - Typo Fix in UI/Text: Resolved a UI typo referenced in issue #22 (commit 7c3348f0460e365c21c876846f5e91d878faa984). - Nightly Build Stabilization: Stabilized nightly builds to reduce flaky failures (commit 789b0a940ef5549608665dceeaf48c5e3e57cebd). - CI/Non-functional Free-Threaded Build Test Disablement: Disabled tests for non-functional free-threaded builds to stabilize CI (commit da5d85d4917dd83ad881096f26077a901ab9a383). - OpenGL Warning Filtering: Filter OpenGL warnings on Windows test server to improve test reliability (commit 0c46112c127cb41c1519fba104cf9b879815ab23). - Clang Build Fixes: Resolved clang build issues to restore clean builds (commit 77653dddbe3d7d41d3a7fa529dce37f94e436846). Overall impact and accomplishments: - Significantly improved product reliability and developer productivity through feature delivery, stability improvements, and build hygiene across Windows, Linux, and Docker environments. The Issue Update Tool and build-name enhancements reduce triage time and improve traceability. CMake compatibility patches expand reach into legacy environments, while Parquet Docker support enables data-workflow pipelines. The CI readiness activities position the project for a smoother Windows 2025 transition with more predictable, quieter builds. Technologies/skills demonstrated: - Cross-platform build engineering (CMake, Clang, Windows/Linux CI, ubuntu-latest CI use). - Container and data-workflow capabilities (Dockerfile Parquet support). - Build hygiene and quality improvements (warning reductions, code style enforcement). - CI pipeline stabilization (nightly builds, test enablement/disablement, OpenGL warning handling). - Clear build provenance and naming for easier traceability.
July 2025
64 Commits • 35 Features
Jul 1, 2025July 2025 (eclipse-sumo/sumo): Delivered a dense set of testing, refactor, and CI/IO improvements that enhance reliability, configurability, and cross-platform stability. The work accelerates release readiness and improves data export consistency for analytics and high-score features.
64 Commits • 35 Features
Jul 1, 2025July 2025 (eclipse-sumo/sumo): Delivered a dense set of testing, refactor, and CI/IO improvements that enhance reliability, configurability, and cross-platform stability. The work accelerates release readiness and improves data export consistency for analytics and high-score features.
July 2025
June 2025
105 Commits • 34 Features
Jun 1, 2025June 2025 performance snapshot — eclipse-sumo/sumo Key features delivered: - Python CI environment hardening: pinned library versions, forcing Python path, and fixing Python lookup for deterministic CI results. Representative commits include 59045eb244eeaa4847dcab8fdfd87354e40193fb; 08ede2e0a87a41390f7b8dda5aab9f8463c18a67; bd5fc8a0b212ab168a4533ed9a831dfa70037f62; fd983be6e052cb95da54dd18e008cd2d04e8dd1e. - Flaky test stabilization and CI reliability: disabled sporadically failing tests and Windows routesampler flakiness to stabilize CI. Representative commits: 762dc0701310297c3bf57aecd05fbb9bf58c9657; ee5eaa12bb84c6bf0f29333f651f331482281103; 31f54434afd057d8dc4d19944bf0e59185a9e8b3. - Data I/O and formatter enhancements: Parquet formatter initial implementation and CSV formatter addition with autodetection/transfer to Parquet; OutputFormatter refactor with docs. Representative commits: 374cbcb3621f9294779636c2900b70d0d6062e03; ae3d73538aaef73deadeff149c4a205772ee9c13; 79a2db17fd8b6ac16bcae921711c707839014e2e; e4bdbe4faba85b40f19a73e2ffaf00ab4bb7a57b; 2056f2581bf779e3939cad8078fc7187d2270ed6. - Cross-platform build and compiler improvements: exploration and enhancements of C++17 filesystem usage; added support for older compilers; Windows and CentOS build fixes to improve stability. Representative commits: cc9bff1b70d957191ab81d9d77c24afb57a738bd; 07c8b254390a80a8bde30bb19a23a09d5d0c9b05; 172fe7426c83c59e8839f1909cf63dc3fa350229; ae570712ab5c21119abd88f9597d3bb1afe70ae3; 1d9273c03570dc09b607621646df8788be563e1f. - NetEdit tests and nightly build enhancements: started and executed netedit tests within nightly builds to improve test coverage and early issue detection. Commit: 383ec66efc1a017f5ada028520c45d681d7ac26b. Major bugs fixed: - CI stability and test reliability: addressed sporadic failures by disabling flaky tests and stabilizing Windows routesampler tests; improved feedback loops and release velocity. Commits: 762dc0701310297c3bf57aecd05fbb9bf58c9657; ee5eaa12bb84c6bf0f29333f651f331482281103; 31f54434afd057d8dc4d19944bf0e59185a9e8b3. - Cross-platform build reliability: resolved Windows and CentOS build issues to improve cross-platform consistency. Commits: 172fe7426c83c59e8839f1909cf63dc3fa350229; ae570712ab5c21119abd88f9597d3bb1afe70ae3. - Noise reduction in CI outputs: filter minor image changes and version-dependent output; license remark and long GNU link checks timeout handling to speed up failure diagnosis. Commits: 3d5c61e04f6362de87957e9440f9e1289e72b00b; f4be9cd9179abb9d6832bcfc1e17dcd29782152f; 80a109db13356f035173be2b13e37f36b4c16ac8. - Data output robustness: fix parquet and CSV writes for incomplete start; ensure correct write paths and stability in CI data dumps. Commits: 5e915a47e65c3bda132b27f197aa11752dc0a7c6; d843ea0f5114dec76c21566f30146be3c56c1225. - Compatibility and correctness fixes: revert incorrect parquet commit, address Python runtime compatibility issues, and remove netedit tests when evaluated. Commits: 40fd2582a492574ae5fe63b50565e2e4aac0425d; c6d8fea5f9509c6220b753744e28bdb17eeedc6a; 5238098ded7b863465d1d84fde873295d3dec4de. Overall impact and accomplishments: - Significantly improved CI reliability and cross-platform stability, enabling faster feedback and safer releases. - Strengthened data I/O pipelines (CSV/Parquet) for analytics readiness and downstream tooling compatibility. - Improved developer productivity through clearer error messaging, test stability, and documentation updates. Technologies and skills demonstrated: - Python CI optimization, C++17 filesystem usage, and cmake policy enhancements. - Cross-platform build engineering, test automation, and nightly build orchestration. - Data formatting and Parquet/CSV tooling, error messaging improvements, and localization support.
June 2025
105 Commits • 34 Features
Jun 1, 2025June 2025 performance snapshot — eclipse-sumo/sumo Key features delivered: - Python CI environment hardening: pinned library versions, forcing Python path, and fixing Python lookup for deterministic CI results. Representative commits include 59045eb244eeaa4847dcab8fdfd87354e40193fb; 08ede2e0a87a41390f7b8dda5aab9f8463c18a67; bd5fc8a0b212ab168a4533ed9a831dfa70037f62; fd983be6e052cb95da54dd18e008cd2d04e8dd1e. - Flaky test stabilization and CI reliability: disabled sporadically failing tests and Windows routesampler flakiness to stabilize CI. Representative commits: 762dc0701310297c3bf57aecd05fbb9bf58c9657; ee5eaa12bb84c6bf0f29333f651f331482281103; 31f54434afd057d8dc4d19944bf0e59185a9e8b3. - Data I/O and formatter enhancements: Parquet formatter initial implementation and CSV formatter addition with autodetection/transfer to Parquet; OutputFormatter refactor with docs. Representative commits: 374cbcb3621f9294779636c2900b70d0d6062e03; ae3d73538aaef73deadeff149c4a205772ee9c13; 79a2db17fd8b6ac16bcae921711c707839014e2e; e4bdbe4faba85b40f19a73e2ffaf00ab4bb7a57b; 2056f2581bf779e3939cad8078fc7187d2270ed6. - Cross-platform build and compiler improvements: exploration and enhancements of C++17 filesystem usage; added support for older compilers; Windows and CentOS build fixes to improve stability. Representative commits: cc9bff1b70d957191ab81d9d77c24afb57a738bd; 07c8b254390a80a8bde30bb19a23a09d5d0c9b05; 172fe7426c83c59e8839f1909cf63dc3fa350229; ae570712ab5c21119abd88f9597d3bb1afe70ae3; 1d9273c03570dc09b607621646df8788be563e1f. - NetEdit tests and nightly build enhancements: started and executed netedit tests within nightly builds to improve test coverage and early issue detection. Commit: 383ec66efc1a017f5ada028520c45d681d7ac26b. Major bugs fixed: - CI stability and test reliability: addressed sporadic failures by disabling flaky tests and stabilizing Windows routesampler tests; improved feedback loops and release velocity. Commits: 762dc0701310297c3bf57aecd05fbb9bf58c9657; ee5eaa12bb84c6bf0f29333f651f331482281103; 31f54434afd057d8dc4d19944bf0e59185a9e8b3. - Cross-platform build reliability: resolved Windows and CentOS build issues to improve cross-platform consistency. Commits: 172fe7426c83c59e8839f1909cf63dc3fa350229; ae570712ab5c21119abd88f9597d3bb1afe70ae3. - Noise reduction in CI outputs: filter minor image changes and version-dependent output; license remark and long GNU link checks timeout handling to speed up failure diagnosis. Commits: 3d5c61e04f6362de87957e9440f9e1289e72b00b; f4be9cd9179abb9d6832bcfc1e17dcd29782152f; 80a109db13356f035173be2b13e37f36b4c16ac8. - Data output robustness: fix parquet and CSV writes for incomplete start; ensure correct write paths and stability in CI data dumps. Commits: 5e915a47e65c3bda132b27f197aa11752dc0a7c6; d843ea0f5114dec76c21566f30146be3c56c1225. - Compatibility and correctness fixes: revert incorrect parquet commit, address Python runtime compatibility issues, and remove netedit tests when evaluated. Commits: 40fd2582a492574ae5fe63b50565e2e4aac0425d; c6d8fea5f9509c6220b753744e28bdb17eeedc6a; 5238098ded7b863465d1d84fde873295d3dec4de. Overall impact and accomplishments: - Significantly improved CI reliability and cross-platform stability, enabling faster feedback and safer releases. - Strengthened data I/O pipelines (CSV/Parquet) for analytics readiness and downstream tooling compatibility. - Improved developer productivity through clearer error messaging, test stability, and documentation updates. Technologies and skills demonstrated: - Python CI optimization, C++17 filesystem usage, and cmake policy enhancements. - Cross-platform build engineering, test automation, and nightly build orchestration. - Data formatting and Parquet/CSV tooling, error messaging improvements, and localization support.
May 2025
84 Commits • 31 Features
May 1, 2025May 2025 monthly summary for eclipse-sumo/sumo: Focused on scalability, CI reliability, and release automation to accelerate delivery, improve quality, and reduce time-to-market across Windows and Linux/macOS packaging. Significant business value includes faster feedback from CI, more stable releases, and stronger cross-language support.
84 Commits • 31 Features
May 1, 2025May 2025 monthly summary for eclipse-sumo/sumo: Focused on scalability, CI reliability, and release automation to accelerate delivery, improve quality, and reduce time-to-market across Windows and Linux/macOS packaging. Significant business value includes faster feedback from CI, more stable releases, and stronger cross-language support.
May 2025
April 2025
113 Commits • 25 Features
Apr 1, 2025April 2025 focused on delivering subscription-based data access, stabilizing libtraci integration, improving CI/build efficiency, and strengthening test coverage and documentation to accelerate simulation workflows and developer productivity.
April 2025
113 Commits • 25 Features
Apr 1, 2025April 2025 focused on delivering subscription-based data access, stabilizing libtraci integration, improving CI/build efficiency, and strengthening test coverage and documentation to accelerate simulation workflows and developer productivity.
March 2025
42 Commits • 13 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on delivering business value through configurable features, reliability improvements, and an expanded real-time subscription framework across the eclipse-sumo/sumo repository. Key work included configurable ramp length and door width to enable longer ramps, wheel build and license metadata cleanup for faster packaging, and updates to TRACI interoperability and subscriptions. Significant bug fixes improved correctness and stability in subscriptions, gradient calculations, and remote mode behavior, while ongoing style and test improvements raised CI reliability and code quality. The combined efforts enhanced simulation fidelity, real-time observability, packaging hygiene, and developer experience.
42 Commits • 13 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on delivering business value through configurable features, reliability improvements, and an expanded real-time subscription framework across the eclipse-sumo/sumo repository. Key work included configurable ramp length and door width to enable longer ramps, wheel build and license metadata cleanup for faster packaging, and updates to TRACI interoperability and subscriptions. Significant bug fixes improved correctness and stability in subscriptions, gradient calculations, and remote mode behavior, while ongoing style and test improvements raised CI reliability and code quality. The combined efforts enhanced simulation fidelity, real-time observability, packaging hygiene, and developer experience.
March 2025
February 2025
55 Commits • 12 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for eclipse-sumo/sumo. Focused on release reliability, build stability, cross-language support, and developer productivity. Key features delivered include major enhancements to release CI, build pipelines, and documentation to streamline releases; new build niceties to ensure clean, repeatable builds; and broad documentation/CI improvements to improve docs quality and onboarding. Cross-language and platform improvements added Python 3.13 test support and C# enablement by default with libtraci namespace, along with RPM packaging updates. Build-system optimizations reduce redundant work, and repository tooling improvements (tag fetching, checkout speed) accelerate day-to-day development. Numerous test adaptations and code-quality refinements were completed to improve stability across environments and satisfy static analysis (SonarQube) checks.
February 2025
55 Commits • 12 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for eclipse-sumo/sumo. Focused on release reliability, build stability, cross-language support, and developer productivity. Key features delivered include major enhancements to release CI, build pipelines, and documentation to streamline releases; new build niceties to ensure clean, repeatable builds; and broad documentation/CI improvements to improve docs quality and onboarding. Cross-language and platform improvements added Python 3.13 test support and C# enablement by default with libtraci namespace, along with RPM packaging updates. Build-system optimizations reduce redundant work, and repository tooling improvements (tag fetching, checkout speed) accelerate day-to-day development. Numerous test adaptations and code-quality refinements were completed to improve stability across environments and satisfy static analysis (SonarQube) checks.
January 2025
5 Commits • 2 Features
Jan 1, 2025January 2025: Focused on usability and reliability for eclipse-sumo/sumo. Delivered key usability enhancements for the Landmark Generation Tool and strengthened internal tooling and build processes to improve code quality, dependency management, and cross-platform build stability. These efforts reduce input-related errors, improve reproducibility, and accelerate feature delivery across the repository.
5 Commits • 2 Features
Jan 1, 2025January 2025: Focused on usability and reliability for eclipse-sumo/sumo. Delivered key usability enhancements for the Landmark Generation Tool and strengthened internal tooling and build processes to improve code quality, dependency management, and cross-platform build stability. These efforts reduce input-related errors, improve reproducibility, and accelerate feature delivery across the repository.
January 2025
Activity
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Quality Metrics
Correctness87.0%
Maintainability89.0%
Architecture82.2%
Performance79.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
BashBatchBatch ScriptBatchfileBibTeXCC#C++CMakeCSV
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAcademic PublishingApache ArrowArchivingAttribute HandlingAutomationBackend DevelopmentBibTeXBindings DevelopmentBug FixBug FixingBuild AutomationBuild Configuration
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