google/perfetto
Nov 2024 – Jun 2026
6 Months active
Languages Used
SQLTypeScriptJavaPython
Technical Skills
Performance AnalysisSQLDebuggingFull Stack DevelopmentPlugin DevelopmentTrace Analysis
Nicolo' Mazzucato
PROFILE
Nicolo' Mazzucato
Worked extensively on the google/perfetto repository, delivering features and fixes to enhance performance analysis and reliability for Android applications. Developed and optimized SQL-based metrics for blocking calls and latency-critical user journeys, improving data accuracy and reducing query overhead. Introduced plugin-based workspace organization for System UI traces, leveraging TypeScript and SQL to streamline trace analysis. Migrated Android jank metrics and UI thread resolution logic to the standard library, focusing on maintainability and error handling. Demonstrated proficiency in Java, SQL, and TypeScript while addressing bugs, expanding trace capabilities, and ensuring robust data migration and database management across evolving performance diagnostics workflows.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
10Total
Bugs
2
Commits
10
Features
6
Lines of code
718
Activity Months6
Your Network
5262 peopleSame Organization
@google.com5001
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
261
Work History
June 2026
3 Commits • 1 Features
Jun 1, 2026June 2026: Perfetto Google repository progress focused on standard library migration for Android jank metrics, relocating UI thread resolution logic to stdlib, and improving resilience of blocking call metrics. Established groundwork for full stdlib migration while enhancing stability and maintainability.
3 Commits • 1 Features
Jun 1, 2026June 2026: Perfetto Google repository progress focused on standard library migration for Android jank metrics, relocating UI thread resolution logic to stdlib, and improving resilience of blocking call metrics. Established groundwork for full stdlib migration while enhancing stability and maintainability.
June 2026
May 2026
2 Commits • 1 Features
May 1, 2026Month: 2026-05 — Delivered Blocking Calls Performance Metrics Enhancement for google/perfetto. Fixed the blocking call table after the latest refactor to include render thread data, and improved per-frame blocking_calls metrics by materializing intermediate views into dedicated Perfetto tables to reduce SQLite join overhead. These changes increase data accuracy for blocking calls analysis and speed up per-frame metric computations, enabling faster and more reliable performance dashboards.
May 2026
2 Commits • 1 Features
May 1, 2026Month: 2026-05 — Delivered Blocking Calls Performance Metrics Enhancement for google/perfetto. Fixed the blocking call table after the latest refactor to include render thread data, and improved per-frame blocking_calls metrics by materializing intermediate views into dedicated Perfetto tables to reduce SQLite join overhead. These changes increase data accuracy for blocking calls analysis and speed up per-frame metric computations, enabling faster and more reliable performance dashboards.
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%
Architecture84.0%
Performance82.0%
AI Usage28.0%
Skills & Technologies
Programming Languages
JavaPythonSQLTypeScript
Technical Skills
Android DevelopmentDebuggingFull Stack DevelopmentJavaPerformance AnalysisPlugin DevelopmentPython testingSQLTrace AnalysisTypeScriptTypeScript DevelopmentUnit Testingdata analysisdata migrationdatabase management
Repositories Contributed To
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