EXCEEDS logo
Exceeds
hengjiang.ly

PROFILE

Hengjiang.ly

Developed a SIMD-accelerated string search feature for the IBM/velox repository, focusing on enhancing text-processing performance in C++. The work introduced simdStrstr, a new method that leverages SIMD instructions to compare the first and last characters of the search needle in parallel batches before proceeding to full string comparison. This approach reduces unnecessary comparisons and improves the efficiency of search-heavy queries, particularly in scenarios where early character matches are common. The implementation replaced the traditional std::find in common search patterns, laying a foundation for broader performance optimization in Velox and demonstrating expertise in C++, SIMD, and string algorithms.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

1Total
Bugs
0
Commits
1
Features
1
Lines of code
609
Activity Months1

Your Network

457 people

Work History

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024 — IBM/velox: Focused on performance-driven enhancements by delivering a SIMD-accelerated string search feature. Implemented simdStrstr to significantly speed up string searching over the traditional std::find, using SIMD batches to compare the first/last characters before full comparisons. This work lays the groundwork for faster text-processing workloads and improves responsiveness of search-heavy queries across Velox-based deployments.

Activity

Loading activity data...

Quality Metrics

Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance100.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++

Technical Skills

C++Performance OptimizationSIMDString Algorithms

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

IBM/velox

Nov 2024 Nov 2024
1 Month active

Languages Used

C++

Technical Skills

C++Performance OptimizationSIMDString Algorithms