google/perfetto
Nov 2024 – Apr 2026
4 Months active
Languages Used
SQLTypeScriptJavaPython
Technical Skills
Performance AnalysisSQLDebuggingFull Stack DevelopmentPlugin DevelopmentTrace Analysis
Nicolo' Mazzucato
PROFILE
Nicolo' Mazzucato
Nico Mazzariello contributed to the google/perfetto repository by engineering features that enhance performance analysis and reliability for Android applications. Over four months, he developed tools for detecting UI rendering bottlenecks in Jetpack Compose, introduced multi-flow tracing support to improve recomposition observability, and implemented state tracking for latency-critical user journeys. His work involved updating SQL schemas, extending trace instrumentation, and building plugins to organize and analyze system UI traces. Using Java, TypeScript, and SQL, Nico addressed both feature development and bug fixes, demonstrating depth in debugging, database management, and performance analysis while improving the accuracy and efficiency of Perfetto’s diagnostics.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
5Total
Bugs
1
Commits
5
Features
4
Lines of code
461
Activity Months4
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 monthly summary for google/perfetto: Delivered latency-critical CUJ state tracking to improve reliability of performance metrics. The changes introduce states for latency CUJs (completed, canceled, timeout) and updated SQL tables and trace-based logic to reflect these states, improving reliability of performance metrics. Fixed a reliability bug where latency CUJs could be incorrectly marked as completed; aligned with optional instant events. This work supports more trustworthy latency metrics, enabling better SLIs and data-driven optimization. Technologies demonstrated include SQL schema changes, trace-based instrumentation, and stdlib latency CUJ handling.
1 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for google/perfetto: Delivered latency-critical CUJ state tracking to improve reliability of performance metrics. The changes introduce states for latency CUJs (completed, canceled, timeout) and updated SQL tables and trace-based logic to reflect these states, improving reliability of performance metrics. Fixed a reliability bug where latency CUJs could be incorrectly marked as completed; aligned with optional instant events. This work supports more trustworthy latency metrics, enabling better SLIs and data-driven optimization. Technologies demonstrated include SQL schema changes, trace-based instrumentation, and stdlib latency CUJ handling.
April 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Focused on expanding Perfetto tracing capabilities in google/perfetto by enabling multi-flow ID support to improve recomposition tracing. Implemented PerfettoTrackEventBuilder updates to leverage new addFlow and addTerminatingFlow APIs, replacing the previous single-flow limitation. Linked to bug 460413832 and included in commit d341a3ceb26dfce70db7ba9123f868309ba2fa09. This work enhances observability, facilitates faster debugging across multi-flow scenarios, and sets foundations for future tracing capabilities.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Focused on expanding Perfetto tracing capabilities in google/perfetto by enabling multi-flow ID support to improve recomposition tracing. Implemented PerfettoTrackEventBuilder updates to leverage new addFlow and addTerminatingFlow APIs, replacing the previous single-flow limitation. Linked to bug 460413832 and included in commit d341a3ceb26dfce70db7ba9123f868309ba2fa09. This work enhances observability, facilitates faster debugging across multi-flow scenarios, and sets foundations for future tracing capabilities.
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for google/perfetto focusing on SysUI trace workspace enhancements and stability improvements. Key outcomes include the introduction of a SysUI Trace Workspace Plugin to organize SysUI-related tracks (UI events, thread states) for streamlined analysis, and a bug fix that restores correct group generation by ensuring newly created track groups are appended to the workspace's children after a refactor. These changes improve troubleshooting efficiency, data organization, and reliability of SysUI performance analysis across the Perfetto repository.
2 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for google/perfetto focusing on SysUI trace workspace enhancements and stability improvements. Key outcomes include the introduction of a SysUI Trace Workspace Plugin to organize SysUI-related tracks (UI events, thread states) for streamlined analysis, and a bug fix that restores correct group generation by ensuring newly created track groups are appended to the workspace's children after a refactor. These changes improve troubleshooting efficiency, data organization, and reliability of SysUI performance analysis across the Perfetto repository.
January 2025
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for google/perfetto: Focused on improving detection of critical blocking calls in Jetpack Compose to surface UI rendering bottlenecks earlier, enabling targeted optimization and faster remediation of performance issues.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for google/perfetto: Focused on improving detection of critical blocking calls in Jetpack Compose to surface UI rendering bottlenecks earlier, enabling targeted optimization and faster remediation of performance issues.
Activity
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Quality Metrics
Correctness92.0%
Maintainability84.0%
Architecture80.0%
Performance76.0%
AI Usage24.0%
Skills & Technologies
Programming Languages
JavaPythonSQLTypeScript
Technical Skills
Android DevelopmentDebuggingFull Stack DevelopmentJavaPerformance AnalysisPlugin DevelopmentPython testingSQLTrace AnalysisTypeScriptTypeScript DevelopmentUnit Testingdatabase management
Repositories Contributed To
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