google/perfetto
Oct 2024 – Apr 2026
19 Months active
Languages Used
C++JavaScriptPythonSCSSTypeScriptShellprotobufMarkdown
Technical Skills
Asynchronous ProgrammingBug FixClass-based ComponentsCode AnalysisCode OrganizationDependency Management
Primiano Tucci
PROFILE
Primiano Tucci
Primiano worked extensively on the google/perfetto repository, delivering robust tracing infrastructure and UI enhancements over a 19-month period. He engineered features such as cross-platform lock-free task execution, advanced trace buffer management, and plugin-driven UI modularity, using C++, TypeScript, and Python. His technical approach emphasized maintainability and reliability, introducing shadow mode tracing for V1/V2 validation, touch event handling for cross-device support, and streamlined CI/CD pipelines. By refactoring core APIs, optimizing build systems, and improving error handling, Primiano addressed both performance and developer experience. His work demonstrated depth in system programming, concurrency, and frontend development, resulting in resilient, scalable solutions.
Overall Statistics
Feature vs Bugs
73%Features
Repository Contributions
241Total
Bugs
39
Commits
241
Features
105
Lines of code
74,549
Activity Months19
Your Network
4626 peopleSame Organization
@google.com4393
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
233
Work History
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026 (2026-04) — Implemented a Chinese Documentation Translation Banner for Perfetto docs to promote community-maintained CN docs with a dismiss option and language-based visibility. The banner directs users to CN documentation and enhances accessibility for Chinese-speaking users, aligning with community-driven localization goals. This work is captured by commit 6590fe9caf7164476c046cadb14ef9c8f79283e7 (docs: Add link to community maintained CN docs (#5386)).
1 Commits • 1 Features
Apr 1, 2026April 2026 (2026-04) — Implemented a Chinese Documentation Translation Banner for Perfetto docs to promote community-maintained CN docs with a dismiss option and language-based visibility. The banner directs users to CN documentation and enhances accessibility for Chinese-speaking users, aligning with community-driven localization goals. This work is captured by commit 6590fe9caf7164476c046cadb14ef9c8f79283e7 (docs: Add link to community maintained CN docs (#5386)).
April 2026
March 2026
8 Commits • 3 Features
Mar 1, 2026March 2026 monthly summary for google/perfetto focused on delivering business value through enhanced tracing capabilities, release readiness, cross-platform reliability, and improved observability.
March 2026
8 Commits • 3 Features
Mar 1, 2026March 2026 monthly summary for google/perfetto focused on delivering business value through enhanced tracing capabilities, release readiness, cross-platform reliability, and improved observability.
February 2026
10 Commits • 3 Features
Feb 1, 2026February 2026: Strengthened cross-platform tracing tooling, improved protobuf error handling, and prepared Perfetto v54. Key contributions include protobuf/tracing tooling enhancements, hardened Windows build stability, enhanced Android/out-of-tree proto support, and updated release notes. These changes improve data fidelity, CI reliability, and integration ease across Android and Windows environments.
10 Commits • 3 Features
Feb 1, 2026February 2026: Strengthened cross-platform tracing tooling, improved protobuf error handling, and prepared Perfetto v54. Key contributions include protobuf/tracing tooling enhancements, hardened Windows build stability, enhanced Android/out-of-tree proto support, and updated release notes. These changes improve data fidelity, CI reliability, and integration ease across Android and Windows environments.
February 2026
January 2026
12 Commits • 4 Features
Jan 1, 2026January 2026 (google/perfetto): Delivered reliability, observability, and developer-experience improvements focused on validating V2 against V1, stabilizing data writes, clarifying queries, and strengthening CI. Key features include a shadow mode tracing path that runs V1 and V2 in parallel for performance validation, a flag-based approach to controlled file flushing that fixes a data-flush bug, and a memory sizing rename (memory_size -> system_ram) with a GB variant to reduce query ambiguity. User experience improvements include clearer error messaging for corrupt trace files and for virtual environment installation failures, plus automation that activates the Python virtual environment before tests. In addition, onboarding and CI/build stability were improved through streamlined developer guidance, build-time optimizations (removing cmath, inotify tweaks), longer test timeouts, and self-hosted runner maintenance. These changes collectively reduce support overhead, accelerate troubleshooting, shorten feedback cycles for performance validation, and improve data fidelity and reliability across the trace pipeline.
January 2026
12 Commits • 4 Features
Jan 1, 2026January 2026 (google/perfetto): Delivered reliability, observability, and developer-experience improvements focused on validating V2 against V1, stabilizing data writes, clarifying queries, and strengthening CI. Key features include a shadow mode tracing path that runs V1 and V2 in parallel for performance validation, a flag-based approach to controlled file flushing that fixes a data-flush bug, and a memory sizing rename (memory_size -> system_ram) with a GB variant to reduce query ambiguity. User experience improvements include clearer error messaging for corrupt trace files and for virtual environment installation failures, plus automation that activates the Python virtual environment before tests. In addition, onboarding and CI/build stability were improved through streamlined developer guidance, build-time optimizations (removing cmath, inotify tweaks), longer test timeouts, and self-hosted runner maintenance. These changes collectively reduce support overhead, accelerate troubleshooting, shorten feedback cycles for performance validation, and improve data fidelity and reliability across the trace pipeline.
December 2025
7 Commits • 6 Features
Dec 1, 2025December 2025: Focused on reliability, performance, and future readiness across the Perfetto repository. Delivered key features and stability fixes that reduce operational risk, improve data fidelity, and accelerate the transition to TBV2 through configurable and maintainable changes.
7 Commits • 6 Features
Dec 1, 2025December 2025: Focused on reliability, performance, and future readiness across the Perfetto repository. Delivered key features and stability fixes that reduce operational risk, improve data fidelity, and accelerate the transition to TBV2 through configurable and maintainable changes.
December 2025
November 2025
28 Commits • 14 Features
Nov 1, 2025Perfetto 2025-11: Key features delivered span tracing stability, build tooling robustness, UI delivery improvements, and CI reliability. Highlights include memory footprint reduction during traced_probes shutdown via purging Scudo memory, more resilient Python/Rust environment handling in install-build-deps, end-to-end UI delivery optimizations (gzip encoding, font/CSS preloads, and CSP tightening with EngineProxy tagging), cross-platform stability enhancements (FreeBSD tooling QoL and macOS UnixSocket timeout alignment), and strengthened CI workflows (test artifact upload stabilization and resilient presubmit).
November 2025
28 Commits • 14 Features
Nov 1, 2025Perfetto 2025-11: Key features delivered span tracing stability, build tooling robustness, UI delivery improvements, and CI reliability. Highlights include memory footprint reduction during traced_probes shutdown via purging Scudo memory, more resilient Python/Rust environment handling in install-build-deps, end-to-end UI delivery optimizations (gzip encoding, font/CSS preloads, and CSP tightening with EngineProxy tagging), cross-platform stability enhancements (FreeBSD tooling QoL and macOS UnixSocket timeout alignment), and strengthened CI workflows (test artifact upload stabilization and resilient presubmit).
October 2025
2 Commits • 1 Features
Oct 1, 20252025-10 monthly summary for google/perfetto focusing on key features delivered, bugs fixed, impact, and skills demonstrated.
2 Commits • 1 Features
Oct 1, 20252025-10 monthly summary for google/perfetto focusing on key features delivered, bugs fixed, impact, and skills demonstrated.
October 2025
September 2025
7 Commits • 3 Features
Sep 1, 2025Performance reviews-ready monthly summary for google/perfetto (September 2025). Focused on delivering cross-platform lock-free task execution, API maintainability, test stability, and governance improvements that collectively raise robustness, throughput potential, and code quality.
September 2025
7 Commits • 3 Features
Sep 1, 2025Performance reviews-ready monthly summary for google/perfetto (September 2025). Focused on delivering cross-platform lock-free task execution, API maintainability, test stability, and governance improvements that collectively raise robustness, throughput potential, and code quality.
August 2025
11 Commits • 4 Features
Aug 1, 20252025-08 monthly summary for google/perfetto focused on cross-platform RTMutex adoption, stability improvements, and codebase simplification. Highlights include real-time mutex policy unification, Chromium build considerations, enhanced TaskRunner tests, and foundational utilities introduced to simplify future optimizations.
11 Commits • 4 Features
Aug 1, 20252025-08 monthly summary for google/perfetto focused on cross-platform RTMutex adoption, stability improvements, and codebase simplification. Highlights include real-time mutex policy unification, Chromium build considerations, enhanced TaskRunner tests, and foundational utilities introduced to simplify future optimizations.
August 2025
July 2025
7 Commits • 3 Features
Jul 1, 2025July 2025: Focused on strengthening tracing debugging workflows, cross-platform stability, and contributor experience. Delivered a new tracing debugging tutorial, improved trace download UX with a file picker and fixed a postmessage bug, resolved a macOS build issue, and updated project docs and contributor guides to streamline collaboration and governance. These changes deliver tangible business value by enabling faster diagnosis of performance regressions, safer cross-platform builds, and clearer contributor pathways.
July 2025
7 Commits • 3 Features
Jul 1, 2025July 2025: Focused on strengthening tracing debugging workflows, cross-platform stability, and contributor experience. Delivered a new tracing debugging tutorial, improved trace download UX with a file picker and fixed a postmessage bug, resolved a macOS build issue, and updated project docs and contributor guides to streamline collaboration and governance. These changes deliver tangible business value by enabling faster diagnosis of performance regressions, safer cross-platform builds, and clearer contributor pathways.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for google/perfetto focused on delivering cross-device input capabilities, stabilizing builds, and strengthening cross-platform usability. Highlights include a new touchscreen input workflow and a critical macOS build fix that removed a frequent failure point, with concrete commits guiding future work.
2 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for google/perfetto focused on delivering cross-device input capabilities, stabilizing builds, and strengthening cross-platform usability. Highlights include a new touchscreen input workflow and a critical macOS build fix that removed a frequent failure point, with concrete commits guiding future work.
June 2025
May 2025
27 Commits • 14 Features
May 1, 2025May 2025 monthly summary for google/perfetto focused on delivering business value through improved platform support, robust CI pipelines, and maintainable repository hygiene. The month consolidated feature work, stabilized test and validation pipelines, and modernized workflows to shorten feedback loops and reduce toil.
May 2025
27 Commits • 14 Features
May 1, 2025May 2025 monthly summary for google/perfetto focused on delivering business value through improved platform support, robust CI pipelines, and maintainable repository hygiene. The month consolidated feature work, stabilized test and validation pipelines, and modernized workflows to shorten feedback loops and reduce toil.
April 2025
28 Commits • 8 Features
Apr 1, 2025April 2025 performance highlights for google/perfetto: Strengthened governance, CI reliability, and developer tooling to accelerate feature delivery while improving quality. Delivered end-to-end improvements across CODEOWNERS governance, PR/workflow handling, and code formatting tooling; expanded presubmit tooling and CI workflows; and refreshed build/runtime environments. Implemented a UI bug fix and a Perfetto dev server encoding change to optimize user experience and delivery efficiency. These changes reduce PR cycle times, increase reliability, and enable faster safe deployments across Linux Cloud Build and local development.
28 Commits • 8 Features
Apr 1, 2025April 2025 performance highlights for google/perfetto: Strengthened governance, CI reliability, and developer tooling to accelerate feature delivery while improving quality. Delivered end-to-end improvements across CODEOWNERS governance, PR/workflow handling, and code formatting tooling; expanded presubmit tooling and CI workflows; and refreshed build/runtime environments. Implemented a UI bug fix and a Perfetto dev server encoding change to optimize user experience and delivery efficiency. These changes reduce PR cycle times, increase reliability, and enable faster safe deployments across Linux Cloud Build and local development.
April 2025
March 2025
7 Commits • 2 Features
Mar 1, 2025Concise monthly summary for 2025-03 covering the google/perfetto repository. Delivered user-facing features, resolved CI stability issues, and modernized the CI/CD pipeline, resulting in improved collaboration, faster feedback cycles, and more reliable builds and tests.
March 2025
7 Commits • 2 Features
Mar 1, 2025Concise monthly summary for 2025-03 covering the google/perfetto repository. Delivered user-facing features, resolved CI stability issues, and modernized the CI/CD pipeline, resulting in improved collaboration, faster feedback cycles, and more reliable builds and tests.
February 2025
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for google/perfetto. Focused on delivering core tracing reliability and data enrichment, improved bug-reporting controls with per-app Atrace targeting, UI usability enhancements, and test performance improvements. These changes enhanced data quality, tracing configurability, and developer productivity, enabling faster debugging, better telemetry, and streamlined bug-report workflows for performance-critical tracing journeys.
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for google/perfetto. Focused on delivering core tracing reliability and data enrichment, improved bug-reporting controls with per-app Atrace targeting, UI usability enhancements, and test performance improvements. These changes enhanced data quality, tracing configurability, and developer productivity, enabling faster debugging, better telemetry, and streamlined bug-report workflows for performance-critical tracing journeys.
February 2025
January 2025
24 Commits • 14 Features
Jan 1, 2025January 2025 delivered a broad set of UI, tracing, and RecordingV2 improvements for google/perfetto, prioritizing performance, reliability, and deployment stability. Key user-facing features include OOM detection improvements, CodeMirror CSS containment, improved handling of long QueryServiceState responses, and a new headless UI mode, complemented by dev-server lifecycle improvements. Tracing reliability was advanced with FD-passing cleanup and backward-compat signatures, added cgroups-v2 awareness for IsAndroidProcessFrozen, and a major RecordingV2 rollout with serialization fixes, stable+canary rollouts, and Web Device Proxy support. Legacy recording v1 was removed as part of cleanup, and multiple stability/backport fixes were applied to ensure a smoother experience across canary and stable channels. Notable bug fixes addressed >64MB trace recording, audio group handling in RecordingV2, and tooling/Docs quality.
January 2025
24 Commits • 14 Features
Jan 1, 2025January 2025 delivered a broad set of UI, tracing, and RecordingV2 improvements for google/perfetto, prioritizing performance, reliability, and deployment stability. Key user-facing features include OOM detection improvements, CodeMirror CSS containment, improved handling of long QueryServiceState responses, and a new headless UI mode, complemented by dev-server lifecycle improvements. Tracing reliability was advanced with FD-passing cleanup and backward-compat signatures, added cgroups-v2 awareness for IsAndroidProcessFrozen, and a major RecordingV2 rollout with serialization fixes, stable+canary rollouts, and Web Device Proxy support. Legacy recording v1 was removed as part of cleanup, and multiple stability/backport fixes were applied to ensure a smoother experience across canary and stable channels. Notable bug fixes addressed >64MB trace recording, audio group handling in RecordingV2, and tooling/Docs quality.
December 2024
13 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for google/perfetto. Key focus areas were delivering Recording V2, stabilizing UI operations, and strengthening core tracing robustness, with a strong emphasis on UX improvements and maintainability. This period established a reliable foundation for broader adoption while reducing runtime errors and fragility across the UI and tracing pipeline.
13 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for google/perfetto. Key focus areas were delivering Recording V2, stabilizing UI operations, and strengthening core tracing robustness, with a strong emphasis on UX improvements and maintainability. This period established a reliable foundation for broader adoption while reducing runtime errors and fragility across the UI and tracing pipeline.
December 2024
November 2024
30 Commits • 14 Features
Nov 1, 2024November 2024 performance summary for google/perfetto: - Delivered a major UI refactor to decouple global state and expose a Trace API for App plugins, enabling plugin-based tracing workflows without UI globals. - Implemented the UI API surface and plugin architecture, introducing a Page API, improved sidebar handling, and migrating most UI pages into self-contained plugins with recording control. - Achieved meaningful performance and reliability gains: ftrace tracking is now 10x faster and unnecessary full redraws were removed, contributing to a snappier UI and lower CPU usage. - Strengthened testing and CI: UI tests became more reliable and CI changes detection for UI updates was improved to save resources. - Architectural improvements and tooling enhancements: moved all recording code into a dedicated plugin, relocated GcsUploader to the base module, and exposed featureFlags in the App interface to support feature-driven UI behavior.
November 2024
30 Commits • 14 Features
Nov 1, 2024November 2024 performance summary for google/perfetto: - Delivered a major UI refactor to decouple global state and expose a Trace API for App plugins, enabling plugin-based tracing workflows without UI globals. - Implemented the UI API surface and plugin architecture, introducing a Page API, improved sidebar handling, and migrating most UI pages into self-contained plugins with recording control. - Achieved meaningful performance and reliability gains: ftrace tracking is now 10x faster and unnecessary full redraws were removed, contributing to a snappier UI and lower CPU usage. - Strengthened testing and CI: UI tests became more reliable and CI changes detection for UI updates was improved to save resources. - Architectural improvements and tooling enhancements: moved all recording code into a dedicated plugin, relocated GcsUploader to the base module, and exposed featureFlags in the App interface to support feature-driven UI behavior.
October 2024
9 Commits • 4 Features
Oct 1, 2024In October 2024, the Perfetto UI work centered on delivering user-facing enhancements, stabilizing core UI initialization, and strengthening code organization to reduce maintenance costs and accelerate future feature work. Key outcomes include a modal-based Permalink UX, reliable render initialization, improved navigation robustness, and modular architecture that decouples workspace and UI concerns. The month also introduced promise-based handling for long-running operations, improving user feedback with spinners and simplifying sidebar logic, alongside codebase improvements moving shared utilities to a base module and adding an allowlist-based UI dependency checker. These changes collectively raise user experience, reliability, and developer velocity, while reducing defect surface and enabling faster feature delivery.
9 Commits • 4 Features
Oct 1, 2024In October 2024, the Perfetto UI work centered on delivering user-facing enhancements, stabilizing core UI initialization, and strengthening code organization to reduce maintenance costs and accelerate future feature work. Key outcomes include a modal-based Permalink UX, reliable render initialization, improved navigation robustness, and modular architecture that decouples workspace and UI concerns. The month also introduced promise-based handling for long-running operations, improving user feedback with spinners and simplifying sidebar logic, alongside codebase improvements moving shared utilities to a base module and adding an allowlist-based UI dependency checker. These changes collectively raise user experience, reliability, and developer velocity, while reducing defect surface and enabling faster feature delivery.
October 2024
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Quality Metrics
Correctness90.0%
Maintainability88.4%
Architecture87.0%
Performance83.2%
AI Usage20.8%
Skills & Technologies
Programming Languages
BPBashCC++CSSDockerfileGNGitHTMLJSON
Technical Skills
ADBADB ProtocolAPI DesignAPI IntegrationAndroid DevelopmentAndroid developmentApplication ArchitectureAsynchronous ProgrammingAutomationBackend DevelopmentBash ScriptingBit manipulationBrowser AutomationBug FixBug Fixing
Repositories Contributed To
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