google/perfetto
Nov 2024 – Apr 2026
14 Months active
Languages Used
C++TypeScriptprotoCMarkdownProtoPythonSQL
Technical Skills
Embedded SystemsPerformance AnalysisPerformance MonitoringPlugin DevelopmentProtocol BuffersSystem Programming
sashwinbalaji
PROFILE
Sashwinbalaji
Sashwin Balaji contributed to the google/perfetto repository by developing and optimizing core tracing infrastructure, focusing on reliability, performance, and maintainability. Over 14 months, Sashwin delivered features such as modular tracker architecture, memory-efficient proto builders, and enhanced trace event parsing, while also addressing cross-platform build stability and data integrity. Using C++, Python, and Protocol Buffers, Sashwin improved trace data observability, streamlined CI/CD workflows, and reduced memory usage on Android and WebAssembly targets. The work demonstrated depth in system programming, build system management, and debugging, resulting in a more robust, scalable, and developer-friendly tracing platform for performance analysis.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
125Total
Bugs
30
Commits
125
Features
48
Lines of code
18,536
Activity Months14
Your Network
4629 peopleSame Organization
@google.com4396
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
6 Commits • 2 Features
Apr 1, 2026April 2026 – Google Perfetto: Key delivery focused on reliability, memory efficiency, and cross-platform compatibility. Core accomplishments include Android platform optimizations to reduce memory footprint and improve reliability; WebAssembly build stability improvements for RE2 usage and macOS cross-compilation; TraceBufferV2 data integrity enhancements to prevent packet loss during scraping and wraparound; and a ChunkedTraceReader destructor fix to ensure complete type availability and robust object lifetimes. Impact includes reduced memory usage on Android clients, more stable WASM builds across targets, and improved trace integrity in high-throughput scenarios. Demonstrated technologies include C++ memory/flag management, RE2 integration, Emscripten cross-compilation, and careful resource/destructor handling.
6 Commits • 2 Features
Apr 1, 2026April 2026 – Google Perfetto: Key delivery focused on reliability, memory efficiency, and cross-platform compatibility. Core accomplishments include Android platform optimizations to reduce memory footprint and improve reliability; WebAssembly build stability improvements for RE2 usage and macOS cross-compilation; TraceBufferV2 data integrity enhancements to prevent packet loss during scraping and wraparound; and a ChunkedTraceReader destructor fix to ensure complete type availability and robust object lifetimes. Impact includes reduced memory usage on Android clients, more stable WASM builds across targets, and improved trace integrity in high-throughput scenarios. Demonstrated technologies include C++ memory/flag management, RE2 integration, Emscripten cross-compilation, and careful resource/destructor handling.
April 2026
March 2026
21 Commits • 15 Features
Mar 1, 2026March 2026 (google/perfetto): Delivered TBV2 enhancements in Trace Processor, stabilized rescraping, improved UI data export readability, and automated CI/SDK workflows. The team also expanded Android flags telemetry and continued code hygiene improvements across the codebase, contributing to more reliable data processing and faster, safer CI/CD.
March 2026
21 Commits • 15 Features
Mar 1, 2026March 2026 (google/perfetto): Delivered TBV2 enhancements in Trace Processor, stabilized rescraping, improved UI data export readability, and automated CI/SDK workflows. The team also expanded Android flags telemetry and continued code hygiene improvements across the codebase, contributing to more reliable data processing and faster, safer CI/CD.
February 2026
2 Commits • 1 Features
Feb 1, 2026Month: 2026-02 — concise monthly summary focused on performance optimization and correctness improvements for google/perfetto. Delivered two primary outcomes: (1) High-Load Performance Optimization: Increased kAssertAtNStalls from 200 to 300 to reduce assertion overhead under high-load tracing; (2) StringFilterNe Index Integrity Fix: Prevented index corruption when comparing missing strings, ensuring correct row mapping and preventing data retrieval errors.
2 Commits • 1 Features
Feb 1, 2026Month: 2026-02 — concise monthly summary focused on performance optimization and correctness improvements for google/perfetto. Delivered two primary outcomes: (1) High-Load Performance Optimization: Increased kAssertAtNStalls from 200 to 300 to reduce assertion overhead under high-load tracing; (2) StringFilterNe Index Integrity Fix: Prevented index corruption when comparing missing strings, ensuring correct row mapping and preventing data retrieval errors.
February 2026
January 2026
22 Commits • 11 Features
Jan 1, 2026January 2026 performance summary for google/perfetto focusing on reliability, safety, and observability across the tracing pipeline and tooling. Delivered targeted bug fixes, introduced safer memory/string handling, and expanded per-machine-trace metadata to enable scalable multi-machine analysis. Implemented improvements to trace I/O flushing and instrumentation, resulting in richer telemetry and debuggability. These changes reduce crash risk, improve correlation, and provide richer data for analytics and performance reviews.
January 2026
22 Commits • 11 Features
Jan 1, 2026January 2026 performance summary for google/perfetto focusing on reliability, safety, and observability across the tracing pipeline and tooling. Delivered targeted bug fixes, introduced safer memory/string handling, and expanded per-machine-trace metadata to enable scalable multi-machine analysis. Implemented improvements to trace I/O flushing and instrumentation, resulting in richer telemetry and debuggability. These changes reduce crash risk, improve correlation, and provide richer data for analytics and performance reviews.
December 2025
13 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for google/perfetto focused on stability, memory efficiency, and release readiness. Delivered impactful memory optimizations in the Proto builder, updated packaging and Python API versions, and ensured compatibility with NumPy 2.4. Strengthened CI reliability and test stability to reduce flakiness and accelerate release cycles. These efforts improved runtime efficiency, reinforced product reliability for downstream users, and streamlined contribution workflows.
13 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for google/perfetto focused on stability, memory efficiency, and release readiness. Delivered impactful memory optimizations in the Proto builder, updated packaging and Python API versions, and ensured compatibility with NumPy 2.4. Strengthened CI reliability and test stability to reduce flakiness and accelerate release cycles. These efforts improved runtime efficiency, reinforced product reliability for downstream users, and streamlined contribution workflows.
December 2025
November 2025
20 Commits • 3 Features
Nov 1, 2025November 2025: Delivered targeted UI enhancements for pprof, improved trace tooling UX, and strengthened documentation and release maintenance to drive faster, more reliable performance analysis.
November 2025
20 Commits • 3 Features
Nov 1, 2025November 2025: Delivered targeted UI enhancements for pprof, improved trace tooling UX, and strengthened documentation and release maintenance to drive faster, more reliable performance analysis.
October 2025
5 Commits • 4 Features
Oct 1, 2025October 2025 performance summary for google/perfetto: Delivered features and hygiene improvements that increase release reliability, performance, and developer clarity. Key outcomes include Packaging and Build System Improvements, Android Ftrace Documentation updates, Callstack Analysis performance optimizations, and BlurRegion proto enhancements. In addition to feature work, Debian lintian warnings were fixed, reducing release risk. Overall, improvements streamline packaging, boost tracing throughput, improve UI precision, and provide developers with clearer guidance for Android Ftrace usage.
5 Commits • 4 Features
Oct 1, 2025October 2025 performance summary for google/perfetto: Delivered features and hygiene improvements that increase release reliability, performance, and developer clarity. Key outcomes include Packaging and Build System Improvements, Android Ftrace Documentation updates, Callstack Analysis performance optimizations, and BlurRegion proto enhancements. In addition to feature work, Debian lintian warnings were fixed, reducing release risk. Overall, improvements streamline packaging, boost tracing throughput, improve UI precision, and provide developers with clearer guidance for Android Ftrace usage.
October 2025
September 2025
11 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/perfetto focusing on performance, reliability, and maintainability improvements that drive business value through more robust tracing, stable CI, and cleaner codebase. Highlights include major tracing enhancements, cross-platform stability fixes, and targeted test/framework cleanup that reduce maintenance overhead while enabling deeper observability and faster turnaround on debugging.
September 2025
11 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/perfetto focusing on performance, reliability, and maintainability improvements that drive business value through more robust tracing, stable CI, and cleaner codebase. Highlights include major tracing enhancements, cross-platform stability fixes, and targeted test/framework cleanup that reduce maintenance overhead while enabling deeper observability and faster turnaround on debugging.
August 2025
15 Commits • 5 Features
Aug 1, 20252025-08 monthly summary: Delivered core architectural and tooling improvements to Perfetto, focusing on Trackers, tracing observability, packaging, and codebase hygiene. Key features include Tracker Architecture Modularization (moving trackers to module ownership), enhanced Documentation and Observability for Exclusive Tracing, and Packaging/Release Tooling Improvements (including a Python package bump to 0.14.0, packaging scripts, Debian updates, and a fix to resolve absolute VENV_PYTHON paths). Additional work refined Codebase Organization and Naming Consistency and performed a TraceSorter internal refactor (is_json_event now uint64_t) to prepare future optimizations. Overall impact includes reduced global state, clearer lifecycle management, stronger release workflows, improved documentation, and easier maintenance and onboarding. Skills demonstrated include C++ modular architecture, code refactoring, Python packaging, Debian packaging, and tracing/telemetry integration.
15 Commits • 5 Features
Aug 1, 20252025-08 monthly summary: Delivered core architectural and tooling improvements to Perfetto, focusing on Trackers, tracing observability, packaging, and codebase hygiene. Key features include Tracker Architecture Modularization (moving trackers to module ownership), enhanced Documentation and Observability for Exclusive Tracing, and Packaging/Release Tooling Improvements (including a Python package bump to 0.14.0, packaging scripts, Debian updates, and a fix to resolve absolute VENV_PYTHON paths). Additional work refined Codebase Organization and Naming Consistency and performed a TraceSorter internal refactor (is_json_event now uint64_t) to prepare future optimizations. Overall impact includes reduced global state, clearer lifecycle management, stronger release workflows, improved documentation, and easier maintenance and onboarding. Skills demonstrated include C++ modular architecture, code refactoring, Python packaging, Debian packaging, and tracing/telemetry integration.
August 2025
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 performance summary for google/perfetto: Delivered observable improvements to trace data and developer workflow, combining feature delivery, performance optimizations, and documentation accuracy. The Track Descriptions feature brings backend support and UI exposure with test coverage visibility; the Offline CPU Trace Clearing Optimization reduces unnecessary data clearance by targeting only offline CPUs; and a documentation fix corrects the run-dev-server command, clarifying the correct workflow. These changes boost data context, performance, and developer productivity, aligning with business goals of faster diagnosis and reliable tracing.
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 performance summary for google/perfetto: Delivered observable improvements to trace data and developer workflow, combining feature delivery, performance optimizations, and documentation accuracy. The Track Descriptions feature brings backend support and UI exposure with test coverage visibility; the Offline CPU Trace Clearing Optimization reduces unnecessary data clearance by targeting only offline CPUs; and a documentation fix corrects the run-dev-server command, clarifying the correct workflow. These changes boost data context, performance, and developer productivity, aligning with business goals of faster diagnosis and reliable tracing.
April 2025
1 Commits
Apr 1, 2025April 2025 monthly work summary for google/perfetto focusing on Ftrace Parser reliability and param_set_value_cpm event parsing; regression bug fixed and core functionality restored.
1 Commits
Apr 1, 2025April 2025 monthly work summary for google/perfetto focusing on Ftrace Parser reliability and param_set_value_cpm event parsing; regression bug fixed and core functionality restored.
April 2025
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for google/perfetto: Focused on stabilizing Ftrace event parsing in the presence of a timestamp bug. Implemented a safe workaround by temporarily disabling parsing/tokenizing of param_set_value_cpm events within the ftrace module. The code path remains present but commented out, with a clear TODO to re-enable once the timestamp issue is resolved. This change preserves tracing reliability and reduces erroneous event processing while enabling ongoing debugging and a quicker path to a permanent fix.
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for google/perfetto: Focused on stabilizing Ftrace event parsing in the presence of a timestamp bug. Implemented a safe workaround by temporarily disabling parsing/tokenizing of param_set_value_cpm events within the ftrace module. The code path remains present but commented out, with a clear TODO to re-enable once the timestamp issue is resolved. This change preserves tracing reliability and reduces erroneous event processing while enabling ongoing debugging and a quicker path to a permanent fix.
January 2025
1 Commits
Jan 1, 2025Month 2025-01 — Focused on stabilizing and clarifying Perfetto's Pixel CPM counters in the google/perfetto repository. Delivered a targeted bug fix that reorganizes the Pixel CPM counters under HARDWARE and introduced a name field on CounterBlueprint to prevent unnamed tracks, resulting in clearer data presentation and easier analysis. This work improves data visibility, reduces potential confusion in performance counter data, and aligns with upstream data organization standards. Tech impact includes improved maintainability, clearer taxonomy for performance counters, and demonstrated ability to ship small, focused changes that enhance UX and data quality.
1 Commits
Jan 1, 2025Month 2025-01 — Focused on stabilizing and clarifying Perfetto's Pixel CPM counters in the google/perfetto repository. Delivered a targeted bug fix that reorganizes the Pixel CPM counters under HARDWARE and introduced a name field on CounterBlueprint to prevent unnamed tracks, resulting in clearer data presentation and easier analysis. This work improves data visibility, reduces potential confusion in performance counter data, and aligns with upstream data organization standards. Tech impact includes improved maintainability, clearer taxonomy for performance counters, and demonstrated ability to ship small, focused changes that enhance UX and data quality.
January 2025
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for google/perfetto: Delivered new Perfetto ftrace support for the Central Power Manager's CPM events by introducing the param_set_value_cpm trace event, wiring it through build and proto definitions, and adding parsing/display support to trace CPM-related updates. This enhances observability into power-management activity and supports faster debugging and data-driven power optimizations. Major bugs fixed: none reported this month; focus was on feature delivery and reliability.
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for google/perfetto: Delivered new Perfetto ftrace support for the Central Power Manager's CPM events by introducing the param_set_value_cpm trace event, wiring it through build and proto definitions, and adding parsing/display support to trace CPM-related updates. This enhances observability into power-management activity and supports faster debugging and data-driven power optimizations. Major bugs fixed: none reported this month; focus was on feature delivery and reliability.
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Quality Metrics
Correctness96.0%
Maintainability90.8%
Architecture92.0%
Performance89.4%
AI Usage21.4%
Skills & Technologies
Programming Languages
BashCC++GNJavaJavaScriptMakefileMarkdownProtoProtoBuf
Technical Skills
API DevelopmentAndroid DevelopmentAndroid build systemAndroid developmentBazelBug FixingBuild ConfigurationBuild System ConfigurationBuild System ManagementBuild SystemsBuild ToolsBuild system configurationC++C++ DevelopmentC++ development
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline