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jemalloc - A Scalable Concurrent Memory Allocator
jemalloc is a general-purpose memory allocator designed for high performance in concurrent applications. It reduces fragmentation and improves scalability compared to standard allocators.
C
Added on 2025年7月4日10,271
Stars1,532
ForksC
LanguageProject Introduction
Summary
This project implements a general-purpose memory allocator, jemalloc, optimized for concurrent environments and minimizing memory fragmentation. It provides a robust and efficient alternative to default system allocators.
Problem Solved
Standard system allocators often struggle with performance, scalability, and fragmentation issues under heavy concurrent workloads. jemalloc addresses these problems through its advanced allocation strategies and concurrency-friendly design.
Core Features
Scalable Concurrency
Uses per-thread arenas and advanced locking mechanisms to handle concurrent allocations and deallocations efficiently on multi-core systems.
Fragmentation Avoidance
Employs size classes and slab allocation techniques to reduce internal and external memory fragmentation.
Profiling and Debugging
Includes built-in profiling capabilities (heap profiling, allocation tracing) and robust debugging features to help identify memory-related issues.
Tuneable Configuration
Allows fine-grained tuning of allocation behavior via environment variables and runtime options to optimize for specific workloads.
Tech Stack
C
C++
Use Cases
jemalloc is ideal for applications that require high performance, low memory overhead, and scalability under heavy load, such as:
High-Concurrency Servers
Details
Web servers, application servers, or database servers experiencing high request rates and concurrent memory operations can leverage jemalloc for improved throughput and reduced latency.
User Value
Significantly boosts server performance and stability under load.
Performance-Critical Applications
Details
Any application where memory allocation/deallocation speed is a bottleneck, or where memory fragmentation is a concern (e.g., databases like PostgreSQL, memory-intensive tools).
User Value
Reduces memory overhead and improves overall application speed.
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jemallocjemalloc
jemalloc is a general-purpose memory allocator designed for high performance in concurrent applications. It reduces fragmentation and improves scalability compared to standard allocators.
C
102711532