This article compares two jQuery event‑binding methods—direct .click() and delegated .delegate()—by generating ten thousand list items, measuring execution times, and showing that delegation reduces binding time from about 104 ms to just 2 ms, demonstrating a significant performance advantage.
This article explains practical techniques for designing high‑availability and scalable systems—covering entry, business, cache, and database layers—so developers can handle rapid user growth without service interruptions or degraded performance.
The article explains that beyond our conscious awareness lies implicit memory, a hidden form of long‑term memory that influences decisions without us realizing it, illustrated by examples such as anesthetized patients recalling Shakespeare and everyday choices shaped by unnoticed past information.
This article describes a mobile payment‑focused bank card OCR project that extends an open‑source solution to support Chinese 19‑digit debit cards by introducing new algorithms for vertical coordinate detection, background filtering, single‑character recognition, and Luhn‑based checksum validation.
This guide explains why tmux is essential for developers, outlines its core concepts of sessions, windows, and panes, provides installation steps for macOS, details common shortcuts and commands, and shows how to personalize the environment with popular configurations.
This article explains the differences between code, programs, and processes in Linux, demonstrates how to compile and run a simple program, explores parent‑child relationships, the role of the init process, the process lifecycle, and the copy‑on‑write mechanism.
In an interview at the DCD Shanghai conference, Alibaba’s network planning expert Cao Jie explains how the company views Software‑Defined Networking, its benefits for operational efficiency and flexibility, and its roadmap for deploying SDN across Alibaba’s data‑center infrastructure to support cloud computing and e‑commerce workloads.
This article explains the structure of HAProxy configuration files, detailing the five sections—global, defaults, frontend, backend, and listen—along with key directives such as daemon, maxconn, mode, timeouts, bind, and server, and shows how they work together to manage traffic and monitoring.
The article compares Apache Storm and Apache Spark, examining their origins, architecture, language support, integration capabilities, and performance characteristics, and offers guidance on selecting the right platform for real‑time business intelligence based on specific workload and infrastructure needs.
This article summarizes a China Mobile cloud computing talk covering the company’s vision for private and public clouds, core technologies such as lightweight virtualization, distributed scheduling and coordination, the evolution from “small cloud” to “big cloud”, practical reflections on implementation, and strategic recommendations for future development.
This article explains what Linux swap is, its drawbacks, how to tune the swappiness parameter, methods for monitoring swap usage per system and per process, and practical ways to clear swap, including useful shell scripts and commands.
This article explains Suning's implementation of a Naive Bayes‑based product classification system, detailing its basic theory, formal definition, step‑by‑step training process, three implementation phases, evaluation results, and error analysis to improve classification accuracy.
This guide walks you through installing HAProxy, configuring it to balance HTTP traffic between two Nginx instances on ports 8080 and 8081, and verifying the setup by repeatedly accessing a test page that alternates between the two backend servers.
The article explains how Storm complements batch‑oriented Hadoop by providing fault‑tolerant, low‑latency stream processing for massive, continuously generated data such as Twitter’s tweet firehose, and demonstrates its architecture, key features, and a simple MapReduce‑style code example.
Project Eru, a homegrown Docker‑based orchestration system developed at Mango TV, replaces earlier PaaS attempts with a stateless, scalable core and agent architecture, leveraging Redis clusters, MacVLAN networking, and fine‑grained CPU allocation to achieve rapid, automated scaling across thousands of containers.
This article introduces load‑generating tools, compares their performance, and provides a step‑by‑step Tsung installation and XML configuration to help engineers build a web cluster capable of handling millions of requests per second.
This article explains the Unix principle that everything is a file, describes regular and special file types, outlines why and how disks are partitioned, introduces mount points, and details the standard Linux filesystem hierarchy and inode metadata.
This article explains how to achieve ultra‑high HTTP request rates by using load‑generating tools such as Apache Bench, httperf, JMeter and Tsung, discusses Linux socket limits, provides step‑by‑step installation and configuration examples for Tsung on CentOS, and shows how to run tests and interpret the results for building a high‑performance web cluster.
This guide explains how to reset a Huawei switch's BootROM login password using the console or telnet, detailing the required commands, menu navigation, and subsequent steps to set a new password while avoiding a reboot that would nullify the changes.
This article explains the browser rendering pipeline, the differences between repaint and reflow, and provides practical tips and code examples to minimize costly layout recalculations for smoother web page performance.
