google/perfetto
Nov 2024 – Feb 2025
4 Months active
Languages Used
protobufSQLTypeScriptJavaScriptText
Technical Skills
Protocol BuffersPerformance AnalysisPerformance ProfilingPlugin DevelopmentSQLTrace Analysis
Petr Čermák
PROFILE
Petr Čermák
Over four months, Petr Cermak contributed to the google/perfetto repository by building and enhancing features for Chrome’s performance tracing and analysis tools. He developed new trace event types and visualization tracks, such as explicit GPU compositor thread tracing and a data-driven Scroll Timeline track, using TypeScript, SQL, and Protocol Buffers. Petr refactored plugin architectures for maintainability, improved data integrity with validation, and optimized performance for faster trace analysis. He also addressed plugin stability and introduced Markdown export for reporting. His work demonstrated depth in system design, code organization, and trace processing, enabling more robust debugging and streamlined performance workflows.
Overall Statistics
Feature vs Bugs
88%Features
Repository Contributions
14Total
Bugs
1
Commits
14
Features
7
Lines of code
2,147
Activity Months4
Your Network
4376 people
Work History
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary focusing on improving tracing correlation and governance for Perfetto, delivering key features to enhance observability and code ownership. The work enabled faster root-cause analysis in Chrome Frame tracing scenarios and strengthened code governance for the Chrome Scroll Jank plugin.
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary focusing on improving tracing correlation and governance for Perfetto, delivering key features to enhance observability and code ownership. The work enabled faster root-cause analysis in Chrome Frame tracing scenarios and strengthened code governance for the Chrome Scroll Jank plugin.
February 2025
January 2025
9 Commits • 2 Features
Jan 1, 2025January 2025 focused on stabilizing the Scroll Jank Chrome plugin in Perfetto, enhancing visualization and data modeling for performance analysis, and enabling Markdown-based reporting. Deliveries improved reliability, performance, and collaboration readiness for performance analysis teams.
January 2025
9 Commits • 2 Features
Jan 1, 2025January 2025 focused on stabilizing the Scroll Jank Chrome plugin in Perfetto, enhancing visualization and data modeling for performance analysis, and enabling Markdown-based reporting. Deliveries improved reliability, performance, and collaboration readiness for performance analysis teams.
December 2024
2 Commits • 2 Features
Dec 1, 2024December 2024 — google/perfetto: Implemented key enhancements to Chrome Scroll Timeline analytics to improve debugging fidelity, robustness, and maintainability. Delivered a new visualization track and a data-driven template system for scroll steps, enabling faster triage of scroll-related jank across Chrome traces and safer, more scalable data definitions.
2 Commits • 2 Features
Dec 1, 2024December 2024 — google/perfetto: Implemented key enhancements to Chrome Scroll Timeline analytics to improve debugging fidelity, robustness, and maintainability. Delivered a new visualization track and a data-driven template system for scroll steps, enabling faster triage of scroll-related jank across Chrome traces and safer, more scalable data definitions.
December 2024
November 2024
1 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on Perfetto repo contributions. Highlights: Added THREAD_COMPOSITOR_GPU enum in ChromeThreadDescriptor to support explicit GPU compositor thread tracing, enabling more accurate trace representation and processing. No major bug fixes reported for this period. Impact includes improved trace fidelity for Chrome's compositor path, enabling better performance analysis and debugging, and stronger instrumentation for GPU rendering pipelines. Technologies/skills demonstrated include C++ instrumentation, trace events taxonomy, Perfetto internals, and Git-based collaboration.
November 2024
1 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on Perfetto repo contributions. Highlights: Added THREAD_COMPOSITOR_GPU enum in ChromeThreadDescriptor to support explicit GPU compositor thread tracing, enabling more accurate trace representation and processing. No major bug fixes reported for this period. Impact includes improved trace fidelity for Chrome's compositor path, enabling better performance analysis and debugging, and stronger instrumentation for GPU rendering pipelines. Technologies/skills demonstrated include C++ instrumentation, trace events taxonomy, Perfetto internals, and Git-based collaboration.
Activity
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Quality Metrics
Correctness95.6%
Maintainability92.8%
Architecture93.4%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaScriptSQLTextTypeScriptprotobuf
Technical Skills
Code OrganizationCode Ownership ManagementCode RefactoringData FilteringData VisualizationDebuggingFront End DevelopmentFront-end DevelopmentFull Stack DevelopmentJavaScriptPerformance AnalysisPerformance OptimizationPerformance ProfilingPlugin DevelopmentProtocol Buffers
Repositories Contributed To
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