DataDog/java-profiler
Nov 2025 – Jan 2026
2 Months active
Languages Used
C++YAML
Technical Skills
C++ developmentConcurrencyMemory managementdebuggingperformance profilingContinuous Integration
Roman Kennke
PROFILE
Roman Kennke
Roman Kennke enhanced the DataDog/java-profiler and dd-trace-java repositories by focusing on stability, maintainability, and concurrency improvements. Over three months, he delivered a robust integration cleanup that aligned Datadog’s profiler with upstream async-profiler changes, reducing maintenance overhead and improving compatibility. He addressed concurrency issues in Java by preloading JFR Handlers in dd-task-scheduler, preventing deadlocks and increasing reliability under load. Roman also improved thread safety and memory management in the FlightRecorder component, mitigating use-after-free errors and ensuring accurate profiling. His work demonstrated depth in C++ and Java development, with careful attention to debugging, performance profiling, and system programming challenges.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
5Total
Bugs
3
Commits
5
Features
1
Lines of code
11,438
Activity Months3
Your Network
933 people
Work History
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for DataDog/java-profiler: Delivered upstream-aligned Datadog integration cleanup focused on reducing maintenance burden, improving compatibility with upstream changes, and setting the stage for faster iteration on future patches.
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for DataDog/java-profiler: Delivered upstream-aligned Datadog integration cleanup focused on reducing maintenance burden, improving compatibility with upstream changes, and setting the stage for faster iteration on future patches.
January 2026
December 2025
1 Commits
Dec 1, 2025December 2025: DataDog/dd-trace-java - Stability improvement to dd-task-scheduler by preloading JFR Handlers to prevent deadlocks. This fix reduces task stalls and increases reliability in high-concurrency environments. Commit 015be6d1b3a65da7051113ba1da9cae9d837a115 implemented the change (Fix deadlock in dd-task-scheduler #10096).
December 2025
1 Commits
Dec 1, 2025December 2025: DataDog/dd-trace-java - Stability improvement to dd-task-scheduler by preloading JFR Handlers to prevent deadlocks. This fix reduces task stalls and increases reliability in high-concurrency environments. Commit 015be6d1b3a65da7051113ba1da9cae9d837a115 implemented the change (Fix deadlock in dd-task-scheduler #10096).
November 2025
2 Commits
Nov 1, 2025Month: 2025-11 — DataDog/java-profiler delivered stability and robustness enhancements focused on FlightRecorder and profiling stack depth. Improvements strengthen thread safety, memory management, and profiling accuracy, reducing production risk and enabling more reliable performance diagnostics for complex Java workloads.
2 Commits
Nov 1, 2025Month: 2025-11 — DataDog/java-profiler delivered stability and robustness enhancements focused on FlightRecorder and profiling stack depth. Improvements strengthen thread safety, memory management, and profiling accuracy, reducing production risk and enabling more reliable performance diagnostics for complex Java workloads.
November 2025
Activity
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Quality Metrics
Correctness96.0%
Maintainability84.0%
Architecture84.0%
Performance84.0%
AI Usage24.0%
Skills & Technologies
Programming Languages
C++JavaYAML
Technical Skills
C++ developmentConcurrencyContinuous IntegrationJavaMemory managementSoftware DevelopmentVersion Controldebuggingperformance profilingsystem programming
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
DataDog/dd-trace-java
Dec 2025 – Dec 2025
1 Month active
Languages Used
Java
Technical Skills
ConcurrencyJavaSoftware Development