IBM/velox
Sep 2025 – Oct 2025
2 Months active
Languages Used
C++SQLYAML
Technical Skills
C++Code RefactoringPerformance OptimizationRegular ExpressionsAlgorithm DesignAlgorithms
Abhinav Mukherjee
PROFILE
Abhinav Mukherjee
Anirban Mukherjee contributed to the IBM/velox repository by developing and optimizing core SQL functions and CI workflows over a two-month period. He replaced Boost.Regex with RE2 in Presto SQL functions to achieve linear-time URL parameter extraction, reducing query latency and technical debt. Anirban also introduced new UDFs, including ARRAY_SUBSET for robust array extraction and REMAP_KEYS for flexible map key remapping, both implemented in C++. Additionally, he improved CI reliability by tuning build parallelism and upgrading runner resources, leveraging C++ and CI/CD expertise. His work demonstrated depth in performance optimization, algorithm design, and maintainable codebase evolution for data processing systems.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
3
Lines of code
1,657
Activity Months2
Your Network
2301 people
Work History
October 2025
5 Commits • 2 Features
Oct 1, 2025Month 2025-10 focused on expanding Velox capabilities and strengthening CI reliability. Key features delivered include ARRAY_SUBSET UDF for 1-based array extraction with edge-case handling, REMAP_KEYS UDF for map key remapping, and a performance optimization by replacing boost::regex with RE2 in ParseDurationFunction. In CI, Fedora Debug improvements reduced OOM risk by lowering build parallelism and upgraded to a 16-core runner with NUM_THREADS increased to 8, resulting in faster feedback and more stable builds. Overall, these changes improve data processing throughput, reduce latency in UDF workloads, and enhance CI stability, enabling more reliable releases. Technologies demonstrated: C++, Velox UDF development, RE2 regex, CI/CD optimization, performance tuning.
5 Commits • 2 Features
Oct 1, 2025Month 2025-10 focused on expanding Velox capabilities and strengthening CI reliability. Key features delivered include ARRAY_SUBSET UDF for 1-based array extraction with edge-case handling, REMAP_KEYS UDF for map key remapping, and a performance optimization by replacing boost::regex with RE2 in ParseDurationFunction. In CI, Fedora Debug improvements reduced OOM risk by lowering build parallelism and upgraded to a 16-core runner with NUM_THREADS increased to 8, resulting in faster feedback and more stable builds. Overall, these changes improve data processing throughput, reduce latency in UDF workloads, and enhance CI stability, enabling more reliable releases. Technologies demonstrated: C++, Velox UDF development, RE2 regex, CI/CD optimization, performance tuning.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 performance-focused improvement in Velox Presto SQL: replaced Boost.Regex with RE2 for URL parameter extraction (url_extract_parameter and fb_url_extract_parameter) to achieve linear-time matching and avoid backtracking, and removed deprecated URLFunctions.cpp to streamline the codebase. These changes deliver faster query execution for URL parameter extraction and reduce maintenance overhead.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 performance-focused improvement in Velox Presto SQL: replaced Boost.Regex with RE2 for URL parameter extraction (url_extract_parameter and fb_url_extract_parameter) to achieve linear-time matching and avoid backtracking, and removed deprecated URLFunctions.cpp to streamline the codebase. These changes deliver faster query execution for URL parameter extraction and reduce maintenance overhead.
Activity
Loading activity data...
Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++SQLYAML
Technical Skills
Algorithm DesignAlgorithmsBuild SystemsC++C++ DevelopmentCI/CDCode RefactoringData StructuresPerformance OptimizationRegular ExpressionsSQLUDF DevelopmentUnit Testing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline