facebook/jemalloc
Mar 2025 – Jul 2025
3 Months active
Languages Used
C
Technical Skills
C ProgrammingConcurrencyDebuggingMemory ManagementPerformance OptimizationSystem Programming
Shirui Cheng
PROFILE
Shirui Cheng
Worked on the facebook/jemalloc repository to enhance memory management for large-scale, high-concurrency workloads. Delivered Transparent Huge Pages support within the Huge Arena of the Per-Arena Cache, optimizing large memory allocations and addressing a critical race condition during THP initialization. Improved memory reclamation and performance by enabling experimental tcache garbage collection and setting default thresholds for calloc-based allocations. Simplified the memory allocation path by removing the bin batching feature, resulting in cleaner, more maintainable code. Utilized C programming, concurrency, and system programming skills throughout, with a focus on debugging, performance optimization, and ensuring stability for memory-intensive applications in production environments.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
4Total
Bugs
2
Commits
4
Features
2
Lines of code
1,710
Activity Months3
Your Network
2819 peopleSame Organization
@meta.com2798
Peter RongMember
Zain RizviMember
Aahan AggarwalMember
Aliaksei AndreyeuMember
Arjun ChaturvediMember
Aaron PollackMember
Aaryaman SagarMember
Aashay GaikwadMember
Ajanthan AsogamoorthyMember
Work History
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary for facebook/jemalloc focused on simplifying memory allocation by removing the bin batching feature. Reverted changes to batcher.c and related references in arena and bin structures; contributed to a cleaner, more maintainable memory allocation path and improved stability.
1 Commits
Jul 1, 2025July 2025 monthly summary for facebook/jemalloc focused on simplifying memory allocation by removing the bin batching feature. Reverted changes to batcher.c and related references in arena and bin structures; contributed to a cleaner, more maintainable memory allocation path and improved stability.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for facebook/jemalloc: Delivered default experimental options to improve memory management by enabling opt_experimental_tcache_gc by default and setting a default for opt_calloc_madvise_threshold. This work enhances memory reclamation, stability, and performance for memory-heavy workloads within the jemalloc project.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for facebook/jemalloc: Delivered default experimental options to improve memory management by enabling opt_experimental_tcache_gc by default and setting a default for opt_calloc_madvise_threshold. This work enhances memory reclamation, stability, and performance for memory-heavy workloads within the jemalloc project.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025: Delivered memory-management enhancements for facebook/jemalloc with THP support in the Huge Arena of the Per-Arena Cache (PAC) and resolved a critical THP initialization race condition. The work improves memory allocation efficiency for large workloads and enhances stability under high-concurrency scenarios.
2 Commits • 1 Features
Mar 1, 2025March 2025: Delivered memory-management enhancements for facebook/jemalloc with THP support in the Huge Arena of the Per-Arena Cache (PAC) and resolved a critical THP initialization race condition. The work improves memory allocation efficiency for large workloads and enhances stability under high-concurrency scenarios.
March 2025
Activity
Loading activity data...
Quality Metrics
Correctness87.6%
Maintainability85.0%
Architecture82.6%
Performance72.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
C ProgrammingConcurrencyDebuggingMemory ManagementPerformance OptimizationSystem ProgrammingUnit Testing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline