facebookincubator/velox
Mar 2026 – Apr 2026
2 Months active
Languages Used
C++Markdown
Technical Skills
C++ developmentSQLalgorithm designbenchmarkingperformance optimizationtechnical writing
Rajeev Singh
PROFILE
Rajeev Singh
Contributed to the Velox project by developing features and improving reliability in C++ and SQL environments. Built a header-only query plan summary option for IBM/velox, enabling concise diagnostics for large query plans through a nodeHeaderOnly flag and targeted code refactoring. Enhanced performance visibility in facebookincubator/velox by implementing adaptive per-function CPU sampling, introducing dynamic calibration and benchmarking to reduce overhead and improve tracking accuracy. Authored technical documentation to support adoption of these changes. Addressed test stability by reworking unit tests for adaptive CPU sampling, replacing brittle assertions with robust comparisons to ensure reliable CI feedback and maintainable performance testing.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
2
Lines of code
1,215
Activity Months3
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3322 peopleSame Organization
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Work History
April 2026
1 Commits
Apr 1, 2026During April 2026, delivered a stability-focused bug fix in facebookincubator/velox addressing flaky tests in adaptive CPU sampling rate logic. Reworked test to replace brittle absolute state assertions with a robust relative comparison, ensuring the expensive function's sampling rate is never greater than the cheap function's, mitigating measurement noise and false negatives. PR 17002 merged; differential revision D99126870; improved CI reliability for performance tests involving ExprSet workloads.
1 Commits
Apr 1, 2026During April 2026, delivered a stability-focused bug fix in facebookincubator/velox addressing flaky tests in adaptive CPU sampling rate logic. Reworked test to replace brittle absolute state assertions with a robust relative comparison, ensuring the expensive function's sampling rate is never greater than the cheap function's, mitigating measurement noise and false negatives. PR 17002 merged; differential revision D99126870; improved CI reliability for performance tests involving ExprSet workloads.
April 2026
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for facebookincubator/velox focused on performance visibility and overhead management for Velox expression evaluation.
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for facebookincubator/velox focused on performance visibility and overhead management for Velox expression evaluation.
July 2025
1 Commits • 1 Features
Jul 1, 2025Month: 2025-07 — Velox development highlights focused on feature delivery and improved diagnosability for large query plans.
1 Commits • 1 Features
Jul 1, 2025Month: 2025-07 — Velox development highlights focused on feature delivery and improved diagnosability for large query plans.
July 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability90.0%
Architecture95.0%
Performance95.0%
AI Usage25.0%
Skills & Technologies
Programming Languages
C++Markdown
Technical Skills
C++C++ developmentCode RefactoringQuery PlanningSQLSoftware DevelopmentSoftware TestingUnit Testingalgorithm designbenchmarkingperformance optimizationtechnical writing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
IBM/velox
Jul 2025 – Jul 2025
1 Month active
Languages Used
C++
Technical Skills
Code RefactoringQuery PlanningSoftware Development