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This article explains the cache architecture behind false sharing, demonstrates its dramatic performance impact with benchmark code, and shows how Java's @Contended annotation and Caffeine's memory‑padding techniques can effectively eliminate the issue for high‑concurrency applications.
This article dissects Guava Cache's source code, explaining its segment‑based locking, data structures, put/get implementations, cleanup and eviction mechanisms, and then contrasts its performance and design choices with the more modern Caffeine cache, highlighting why Guava falls short.
At GAITC2025, JD Retail’s AI Infra lead Zhang Ke detailed the challenges of e‑commerce AI inference and introduced the xLLM edge‑cloud unified large‑model architecture, highlighting adaptive scheduling, offline unified scheduling, multi‑layer pipelines, and agent collaboration that boost performance, cut costs, and pave the way for future AI advancements.
This article explains Java Bean introspection, its core APIs, practical code examples, common usage scenarios in Spring, advantages and drawbacks, and how it differs from reflection, providing developers with a comprehensive guide to dynamic bean manipulation.
This article provides a comprehensive overview of the Simple Network Management Protocol (SNMP), detailing its architecture, versions, message structures, MIB hierarchy, and practical usage, including command-line tools and Java code examples for monitoring and configuring network devices efficiently.
This guide introduces the Model Context Protocol (MCP), explains its purpose as a standardized USB‑C‑like interface for LLMs, and provides step‑by‑step Python code to set up SSE‑based MCP servers and a client, plus essential installation details and execution commands.
This article explores why outliers destabilize online A/B tests, explains their statistical definitions, compares trimming and winsorizing techniques, reviews classic and machine‑learning detection methods, and offers practical guidance for applying these approaches to improve experiment reliability.
This article introduces a lightweight SQL‑coloring technique for MyBatis that annotates each executed query with its mapper ID and call‑stack, enabling developers to pinpoint performance bottlenecks instantly without hunting through multiple code paths, and provides both MyBatis interceptor and AspectJ weaving implementations.
This article outlines the motivations, progress, and common issues encountered when upgrading over 100 Java applications to JDK 21, including deprecated APIs, module system constraints, Maven plugin incompatibilities, and GC choices, and provides concrete migration steps, configuration templates, and best‑practice recommendations for a smooth transition.
Taro, an open‑source cross‑platform solution from JD, now supports pure HarmonyOS through its C‑API version, enabling developers to build H5, mini‑programs, RN and native Harmony apps using familiar web technologies, offering high‑performance rendering, extensive component support, and seamless migration of existing Taro projects.
