Golang concurrency patterns. Here we have a channel as a table of the ping-pong game.

Golang concurrency patterns Improve your code efficiency and scalability. Whether you’re building high-performance web services, data processing pipelines, or distributed systems, these patterns will prove invaluable in your Go programming toolkit. Aug 27, 2024 · By now, you should have a solid understanding of several key concurrency patterns in Go, including Generators, Pipelines, Fan-Out, and Fan-In. Aug 12, 2021 · Learning Golang: Introduction to Concurrency Patterns, goroutines and channels - YouTube May 1, 2025 · 1. Last week, at I/O 2013, Go team member Sameer Ajmani continued the story with Advanced Go Concurrency Patterns, an in-depth look at a real concurrent programming problem. This comprehensive article will explore the fundamental concepts of concurrency in Golang, delving into the core mechanisms of goroutines and channels. Feb 5, 2023 · In this article, I will introduce 5 master categories of Golang design patterns, including Creational patterns, Structural Patterns, Behaviour Patterns, Concurrency Patterns and Microservice Patterns. By the end of this book we will have discussed the entire stack of Go concurrency concerns: common concurrency pitfalls, motivation behind the design of Go’s con‐currency, the basic syntax of Go’s concurrency primitives, common concurrency pat‐terns, patterns of patterns, and various tooling that will help you along the way. Golang, also known as Go, comes in handy with channels to facilitate concurrent communications reliably and beautifully. Let's dive into what these patterns mean and how they're implemented in Go. Discover efficient techniques for building scalable and high-performance systems. To get started writing web applications, watch A simple programming environment (slides) and read the Writing Web Applications tutorial. Learn to leverage buffered channels, select statements, fan-out/fan-in, pipelines, and timeouts. Oct 13, 2024 · Recently I have joined a new company which was working on high scale searches, There I have realised the importance of Design patterns in… In this video, we’ll master Golang Concurrency using just 2 powerful Design Patterns that every Go developer should know. Learn best practices, avoid common pitfalls, and write efficient concurrent code in Go. When discussing concurrency in Go, two core patterns emerge: Fan-in and Fan-out. Thanks to goroutines and channels, Go makes concurrency a lot more manageable. Jul 15, 2024 · This article explores essential concurrency patterns in Go, demonstrating how to leverage goroutines and channels to build efficient and maintainable concurrent applications. Jan 30, 2025 · Discover 5 essential Golang channel patterns for efficient concurrent programming. By using goroutines and channels, Go provides the tools to build efficient, concurrent systems. Nov 2, 2020 · One of the many things that bring developers to Go is it's concurrency model. Aug 17, 2022 · A worker pool is a concurrency pattern in which a fixed number of workers runs parallely to execute the multiple tasks present in a queue. In golang we use goroutines and channels to build this pattern. Of course, this pattern isn’t very advanced, but for those who only get themselves familiar with Go concurrency it may look quite fresh and interesting. Nov 15, 2024 · Golang Concurrency Patterns: The Golang Concurrency Patterns documentation provides a comprehensive guide to concurrency patterns and best practices. In Go, one elegant way to handle concurrency is through the use of goroutines and channels. In programming, concurrency is the composition of independently executing processes, while parallelism is the simultaneous execution of (possibly related) computations. Mar 22, 2024 · In the ever-evolving landscape of software development, mastering advanced concurrency patterns is crucial for building robust and scalable applications. May 1, 2025 · 1. Generator Pattern In the generator pattern, we create and consume data simultaneously via a channel. Apr 13, 2024 · The queue pattern allows a system to operate asynchronously and brings the following advantages that leverage the performance of the whole application: Concurrency: the system executes several Apr 13, 2024 · The queue pattern allows a system to operate asynchronously and brings the following advantages that leverage the performance of the whole application: Concurrency: the system executes several May 26, 2023 · These patterns deal with the efficient and safe execution of multiple operations or tasks simultaneously. Go was The Go community has plenty resources to read about go's concurrency model and how to use it effectively. In this article, we’ll walk through 7 essential concurrency patterns in Go Oct 17, 2023 · One of the primary reasons developers love Go is its built-in concurrency support. Dec 3, 2021 · Concurrency patterns in Golang: WaitGroup s and Goroutines Oluwatomisin Bamimore I'm a full-stack Python developer, technical writer, and a Section Engineering Education contributor. These patterns focus on leveraging Go’s concurrency primitives, such as goroutines, channels, and select statements, as well as structuring code for readability and maintainability. Jan 13, 2025 · Have you ever struggled with designing a system that needs to handle multiple tasks at once, without blocking or slowing down? Concurrency in Go (Golang) might be exactly what you need. gorutine leak, atomic, mutex, waitgroup In this tutorial, we will discuss some advanced concurrency patterns in Go. Dec 10, 2024 · Concurrency is one of Go’s standout features, enabling developers to write high-performing applications with ease. These patterns are invaluable for writing efficient and responsive Mar 3, 2025 · In this comprehensive guide, we'll explore 7 powerful concurrency patterns that will fundamentally transform how you write concurrent code in Go. Oct 29, 2024 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more. Each pattern serves a unique purpose in handling concurrent operations, and together, they provide a powerful toolkit for building scalable and efficient Go applications. Nitish Bhasker Follow 4 min read Sep 20, 2021 · Applying Modern Go Concurrency Patterns to Data Pipelines Resilient, fast, efficient and concise? Pick all four! How to apply old and new concurrency patterns to pipelines in Golang This article Dec 29, 2024 · # programming # tutorial # go # architecture Mastering Go Concurrency (4 Part Series) 1 Understanding and visualizing Goroutines and Channels in Golang 2 Generator Concurrency Pattern in Go: A Visual Guide 3 Pipeline Concurrency Pattern in Go: A Comprehensive Visual Guide 4 Fan-In Fan-Out Concurrency Pattern in Go: A Comprehensive Guide Dec 29, 2024 · # programming # tutorial # go # architecture Mastering Go Concurrency (4 Part Series) 1 Understanding and visualizing Goroutines and Channels in Golang 2 Generator Concurrency Pattern in Go: A Visual Guide 3 Pipeline Concurrency Pattern in Go: A Comprehensive Visual Guide 4 Fan-In Fan-Out Concurrency Pattern in Go: A Comprehensive Guide Chapter 4. Concurrent programming in many environments is made difficult by the subtleties required to implement correct access to shared variables. Since its introduction in 2007, Go has gained rapid popularity in the tech industry, thanks largely to its practical and intuitive take on concurrent programming. In this blog, we'll journey through a series of hands-on examples, each illustrating an essential lesson in harnessing the power of Dec 17, 2024 · In Golang, besides traditional design patterns, developers frequently utilize concurrency patterns and other idiomatic patterns specific to Go's strengths. It introduced goroutines, channels, and a powerful concurrency model … Oct 3, 2023 · Explore five fundamental patterns for achieving effective concurrency in Go, including task decomposition, worker pools, cancellation and context management, and testing concurrent code. Go (often referred to as Golang) has gained popularity for its simplicity and robust support for concurrency through Goroutines and channels. Aug 17, 2016 · While my previous article covered the basics of Concurrency in Golang, this article will shed light on some of the Concurrency Patterns followed in the world of Go. This article will discuss advanced concurrency patterns like worker pools, fan-out Oct 7, 2024 · Concurrency patterns like worker pools and fan-out/fan-in are excellent for optimizing web servers, batch processing, and other I/O-bound applications, making sure resources are efficiently managed. Master concurrent programming in Go. Welcome! Let's learn about Go/Golang Concurrency Patterns, this time I'm sharing with you the implementation of the "Background Jobs" or "Background Process" Sep 17, 2023 · Concurrent programming is a powerful approach for creating performance-tuned and reactive software. Jun 10, 2025 · Concurrency is a fundamental concept in modern software development, and Go (also known as Golang) has built-in concurrency features that make it easier to write efficient and scalable programs. Jan 19, 2023 · Golang Concurrency — Pipelines Concurrency Patterns We could understand the pipelines as a group of stages connected by channels and handled by goroutines. Introduction Concurrency is a fundamental aspect of modern software development, allowing programs to perform multiple tasks simultaneously, which can significantly improve performance and responsiveness. Jun 3, 2024 · Concurrency in Golang Best Practices and Examples Welcome to the second installment of our journey through the world of Go programming, where we’re unearthing the best practices that transform … Explore advanced Golang channel optimization techniques, improve concurrency performance, and master efficient communication patterns for high-performance Go applications Jul 4, 2023 · The Complete Guide to Context in Golang: Efficient Concurrency Management Introduction Concurrency is a fundamental aspect of Go programming, and effectively managing concurrent operations is Go takes a different route. Use the left and right arrow keys or click the left and right edges of the page to navigate between slides. Concurrency: a review Want to correctly and efficiently manage shared resources accessed from multiple, concurrent clients What OS constructs could we use to implement a webserver? What if the webserver services requests that write to a shared database? Jan 19, 2023 · Worker pools are a “concurrency pattern” in which a fixed number of workers runs parallel in order to work in a number of task that are holding in a queue. I want to share some techniques I rely on for building high-performance systems. 1. So we could also say, every concurrently running process in Go language is known as a Goroutine. This pattern, crucial for achieving parallelism in tasks that 🚀 Dive into the world of Go concurrency with our latest tutorial on building an efficient image processing pipeline. Overview Concurrency can be notoriously difficult to get right, but fortunately, the Go open source programming language makes working with concurrency tractable and even easy. By understanding and applying these patterns, you can build high-performance concurrent applications that take full advantage of modern computing environments. A worker pool is a mechanism where multiple tasks are distributed among a fixed number of workers that process them concurrently. From worker pools to error handling, learn production-proven techniques to scale Aug 21, 2023 · Yet another Go concurrency pattern! This particular pattern is extremely helpful in composing several transformations from data incoming from a stream, and is know as the pipeline concurrency pattern. Jul 23, 2025 · Worker pools in Golang help manage concurrency efficiently by controlling the number of active workers. Master the 23 GoF design patterns and adapt them idiomatically in Go. Apr 27, 2025 · A Deep Dive into Concurrency in Golang: Understanding Goroutines, Channels, Wait Groups, Concurrency Patterns This one-shot blog covers everything about concurrency in Golang, from basics to … Learn about goroutines in Go, a lightweight way to achieve concurrency and parallelism in your programs. Usually will the workers be defined by a goroutine that is holding until it get data through a channel which is the responsibility to coordinate the workers and the task in Feb 23, 2025 · Transform Your Go Code from Slowpoke to Speed Demon Using These Battle-Tested Concurrency Patterns Aug 21, 2023 · The fan-out concurrency pattern splits the input from one channel into several channels for concurrent processing, while the tee channel pattern creates two channels with the exact same data as the original one. This tutorial will guide you through the process of mastering concurrency in Go, covering real-world use cases, best practices, and hands-on implementation details. Jun 21, 2025 · Master advanced Golang concurrency patterns including Worker Pool, Fan-Out/Fan-In, and Circuit Breaker for building high-performance web APIs with better fault tolerance. It uses goroutines, lightweight functions that run concurrently, and channels, which allow communication and synchronization between goroutines. Mar 6, 2024 · openskill Golang — Concurrency patterns with Goroutine, Channel, and Wait Group. Golang Concurrency Patterns Common and useful golang concurrency patterns I implemented from Rob Pike's famous 2012 Google I/O talk. See examples of fan-out, fan-in, and stopping short in pipelines. But to truly tap into the power of Go's concurrency model, we need to dive deeper. Jan 24, 2016 · Ping-pong This nice concurrency example was found in a great talk by googler Sameer Ajmani “Advanced Go Concurrency Patterns”. Stay tuned for more articles in this series to deepen your understanding of Go’s concurrency patterns and enhance your Go programming skills! Sep 13, 2024 · These patterns will help you tackle complex concurrent scenarios with ease, improve your code’s performance, and enhance its readability and maintainability. Whether you're a seasoned Gopher or just starting your journey with Go, these patterns will take your programming skills to the next level! Feb 5, 2025 · Go (Golang) is designed for concurrency, making it easy to write concurrent applications. Develop design solutions that enhance the clarity, reusability, and maintainability of your Go code. Aug 26, 2024 · This pattern is especially useful when you need to parallelize tasks and improve performance by utilizing multiple cores effectively. Each one of the stages is defined to do a … Aug 20, 2021 · Goroutines To understand concurrency, we must understand what Goroutines are. A collection of idiomatic Go concurrency and design patterns with clear examples. fan out and fan in using different examples To further explore Go's concurrency model, watch Go Concurrency Patterns (slides) and Advanced Go Concurrency Patterns (slides) and read the Share Memory by Communicating codewalk. May 12, 2025 · Discover 9 battle-tested Go concurrency patterns to build high-performance systems. Concurrency patterns in Go. The talk shows how to detect and avoid deadlocks and race conditions, and demonstrates the implementation of Dec 26, 2024 · Master concurrency, scalability, and efficiency with these Golang patterns — Your code will never be the same! Jan 22, 2024 · Dive into common concurrency patterns adopted in Golang, like the Worker Pool Pattern and the Pipeline Pattern. Concurrency Share by communicating Concurrent programming is a large topic and there is space only for some Go-specific highlights here. Boost your Go skills now! Nov 14, 2024 · One common concurrency pattern for task processing is the Worker Pool. In this detailed episode, dive deep into the world of concurrency patterns in Go, focusing on the powerful Fan-Out Fan-In technique. Often, these patterns are used in combination in the real world. Jul 18, 2025 · Discover 10 essential Golang concurrency patterns for efficient, scalable apps. If you’re a developer familiar with Go, this practical book demonstrates best practices and patterns to help you incorporate concurrency into your systems. Enter the world of Go, a programming language that gracefully handles concurrency through goroutines and channels. Oct 25, 2023 · In this blog post, we’ve explored Go concurrency patterns using simplified and easy-to-understand code examples. Mar 7, 2025 · Master concurrency in Go with practical insights on goroutines, channels, and WaitGroups. Concurrency Patterns in Go We’ve explored the fundamentals of Go’s concurrency primitives and discussed how to properly use these primitives. May 4, 2025 · Learn how to effectively use Go goroutines for concurrent programming. This article explores the concept of pipeline patterns in Go, breaking down how they function and offering practical examples for their implementation. Introduction What is Concurrency Jul 24, 2022 · 5 Useful Concurrency Patterns in GO Concurrent programming is one of the most interesting features Golang has to offer. May 16, 2023 · Golang Concurrency Patterns: For-Select-Done, Errgroup and Worker Pool Hello! My name is Nina and I am a Go programmer. Learn to create concurrent applications using Go's unique concurrency model with goroutines and channels. This video guides you step-by-step through the creation of a pipeline that Master Golang concurrent channel operations with advanced synchronization techniques, explore powerful concurrency patterns, and optimize parallel programming performance. Oct 20, 2024 · 讓別人不會知道底層是以 Concurrency 運作 Concurrency 算是實作細節（implementation detail），而好的 API 設計應該要盡可能隱藏使用者不需要知道的這些實作細節。也就是說，實務上在設計 API 時，不論是 API 的型別、函式或方法，你都不應該將 channel 或 mutex 暴露給使用者存取。除非，你的 API 有設計要提供 Aug 19, 2021 · Conclusion Fan-In and Fan-Out are two of the most common Concurrency Patterns in Go, depending on your problem you may find them useful, the important things to always keep in mind is a way to determine when the channels are closed and properly emit a message downstream to indicate that so they can react correctly. I find concrete examples are often the most helpful thing to clearly explain concepts and help people understand how and when to apply them. Jun 17, 2024 · Discover the different concurrency primitives in Go and learn common patterns to utilize them effectively. Golang Concurrency and Design Patterns Implementation Concurrency is a powerful feature in modern programming languages, and Golang (Go) stands out with its efficient concurrency model based on goroutines and channels. Mar 13, 2023 · Hacking Go’s Runtime with Generics In today’s Golang blog post, we’re looking at a real world example of using Go’s concurrency features to solve some concurrency problems I encountered recently. Golang, also known as Go, has emerged as a premier language for tackling concurrency challenges, providing developers with powerful tools and constructs to write concurrent, parallel code. No boring theory, only real-world e Jun 19, 2025 · Concurrency is one of Go’s superpowers, and mastering it is key for building scalable and efficient applications. Sep 9, 2021 · Go Development Patterns Golang Concurrency Patterns : Fan in, Fan out One of the most prominent reasons of loving Golang personally, is how easy we can build a highly available concurrent and non … Jun 13, 2023 · Among programming languages that facilitate concurrency, Go, or Golang, stands out for its unique approach. Learn to leverage goroutines, channels, and more for powerful parallel programming. Apr 7, 2025 · Go makes concurrency simple — but the real power shines when you start using tried-and-tested concurrency patterns. In this chapter, we’ll do a deep-dive into how to compose these primitives into patterns that will help keep your system scalable and maintainable. Learn how to effectively use Goroutines and Channels for efficient concurrent programming in Golang. Aug 10, 2025 · Master Go concurrency with this comprehensive guide. Mar 13, 2014 · Learn how to construct streaming data pipelines with Go's concurrency primitives and deal with failures cleanly. Avoid race conditions and build fast, scalable applications. GoLang, with its built-in support for Jan 3, 2025 · Concurrency in Go: A Deep Dive Go (often referred to as Golang) was designed with concurrency in mind from the very beginning. Because Go was released Tagged with golang, 100daysofcode, codequality, development. Aug 23, 2023 · When developers start exploring Go (or "Golang"), they're often drawn to its simplicity and elegance, especially in handling concurrent programming. We can use this pattern in places where we have huge data that needs to be read and processed. (Press 'H' or navigate to hide this message. They prevent excessive Goroutines, ensuring tasks run smoothly without exhausting resources. Jan 7, 2024 · The best practices of using golang concurrency with examples and best practicies. Dec 16, 2024 · A couple of years ago I worked on a toy library to see if the new-ish generics proposal would finally allow to express some of the most common channel patterns in Go. Dec 25, 2024 · Mastering Go Concurrency (4 Part Series) 1 Understanding and visualizing Goroutines and Channels in Golang 2 Generator Concurrency Pattern in Go: A Visual Guide 3 Pipeline Concurrency Pattern in Go: A Comprehensive Visual Guide 4 Fan-In Fan-Out Concurrency Pattern in Go: A Comprehensive Guide Jun 19, 2023 · A simple explanation of how to do pipeline concurrency patterns in Golang. Boost your Go skills now! Apr 22, 2024 · Conclusion: Concurrency is a first-class citizen in Go, empowering developers to write highly efficient and scalable applications. The idea behind concurrency is to work on different tasks simultaneously, it … Practical concurrency guide in Go, communication by channels, patterns - luk4z7/go-concurrency-guide Welcome to the Go Concurrency Patterns repository! This repository is a comprehensive collection of common concurrency patterns and techniques specifically designed for Go programming. Jul 26, 2025 · Explore advanced channel patterns in Go and discover strategies for managing concurrency, optimizing performance, and enhancing code clarity in your applications. Recommended reading Jan 16, 2013 · But when people hear the word concurrency they often think of parallelism, a related but quite distinct concept. Concurrency in Go: The Concurrency in Go book by Katherine Cox-Buday provides a detailed guide to concurrency in Go. Jun 2, 2025 · Master 7 advanced Golang concurrency patterns including worker pools, fan-in/fan-out, and circuit breakers to build lightning-fast web APIs with optimal performance. Feb 25, 2024 · Unlock the power of Go’s concurrency with these essential patterns. Conclusion: Concurrency patterns in Go, such as goroutines and channels, provide developers with a powerful toolbox for unlocking the power of parallelism. How Pipeline Patterns Work A pipeline pattern in Go is a series of functions that work together to process data. org. If we Advanced Concurrency Patterns in Go: Patterns Beyond Goroutines Concurrency is a fundamental aspect of modern software development, enabling programs to efficiently execute multiple tasks simultaneously. A Goroutine is a function or a method which executes independently and simultaneously in connection with any other Goroutines present in your program. Nov 29, 2024 · Have you ever wondered how to make your Go programs faster and more efficient? Concurrency might sound intimidating, but it’s one of Go’s most powerful features – and it’s surprisingly beginner-friendly! Today, we’ll unlock the secrets of concurrent programming in Go, showing you how to leverage goroutines and channels to build more responsive applications. Each function takes data as input and passes it on to the next function in the chain. Using a worker pool improves CPU utilization, reduces processing time, and enhances application stability, especially for high throughput operations. Learn worker pools, pipelines, fan-out/fan-in, context cancellation & semaphores with benchmarks. This chapter covers the practical aspects of working with Go’s concurrency model, though we suggest reading a little about the theory behind CSP and Go at golang. Jul 7, 2025 · Master 5 advanced Golang concurrency patterns for high-performance web APIs. Among the concurrency design patterns commonly used in Go are Fan-Out and Fan-In, which facilitate parallelism and data aggregation respectively. Contribute to lotusirous/go-concurrency-patterns development by creating an account on GitHub. Sep 17, 2025 · While basic goroutines and channels are powerful, advanced patterns can transform performance, scalability, and reliability. Learn how to master concurrency in Go with this practical tutorial. Select Pattern The select pattern in Go is a control flow construct that allows a goroutine to wait on multiple channel operations and execute May 23, 2013 · At Google I/O a year ago Rob Pike presented Go Concurrency Patterns, an introduction to Go’s concurrency model. In Go, with its lightweight goroutines, creating a worker pool is straightforward and effective. In this May 25, 2025 · Learn how to effectively manage concurrency in Go with expert patterns and best practices. e. Jun 24, 2025 · Master 5 advanced Golang concurrency patterns including worker pools, circuit breakers & reactive pipelines. ) Apr 17, 2020 · Four common concurrency patterns in Golang are: Generator Pattern Futures Pattern Fan-In Pattern Fan-Out Pattern So, let's dive into these patterns one by one with some real-world examples. Learn about Go's powerful concurrency features including goroutines, channels, select statements, and synchronization primitives. Go, also known as Golang, is a modern programming language developed by Google that provides excellent support for concurrency through its lightweight goroutines and channels. Discover practical techniques to optimize your Go code for efficiency and scalability. In this blog, we’ll explore these Dec 3, 2021 · Concurrency patterns in Golang: WaitGroup s and Goroutines Oluwatomisin Bamimore I'm a full-stack Python developer, technical writer, and a Section Engineering Education contributor. Aug 26, 2023 · Introduction Navigating the realm of concurrency in programming can be like orchestrating a symphony of activities that occur simultaneously. Feb 23, 2025 · Transform Your Go Code from Slowpoke to Speed Demon Using These Battle-Tested Concurrency Patterns Aug 21, 2023 · The fan-out concurrency pattern splits the input from one channel into several channels for concurrent processing, while the tee channel pattern creates two channels with the exact same data as the original one. These concepts help in building scalable and efficient systems. Golang has native support for concurrency through its Goroutines and Channels, making it a popular language for concurrent programming. Whether you’re building APIs, stream processors, or system daemons, these Jul 23, 2025 · Concurrency Patterns for Managing Goroutine Resources Effective resource management also involves employing concurrency patterns that help in distributing workloads, preventing resource exhaustion, and ensuring smooth operation across multiple goroutines. Production-ready code examples for high-performance APIs. By understanding Goroutines, channels, and concurrency patterns, you can harness the full power of Go concurrency to build robust, concurrent systems. Nov 27, 2024 · In modern software development, handling concurrency efficiently is essential for designing scalable and responsive systems. Read Go Concurrency Patterns: Timing out, moving on Watch Concurrency is not Parallelism Read Go Concurrency Patterns: Pipelines and Cancellation Read Rethinking Classical Concurrency Patterns Study Package sync Read Introducing the Go Race Detector Watch Go: code that grows with grace Read Mutexes and Semaphores Demystified Advanced Apr 16, 2024 · 6 common Golang Concurrency Patterns are: Generator Pattern, Worker Pool Pattern, Pipeline Pattern, Fan-In Pattern, Semaphore Pattern, and Timeout Pattern. Two prominent concurrency patterns are fan-in and fan-out. Here we have a channel as a table of the ping-pong game. In this article, I want to talk about three concurrency patterns in Go that Channels are typed values that allow goroutines to synchronize and exchange information. But who actually wants to read all this!? This repo tries to teach concurrency patterns by following the 'learning by doing' approach. Concurrency is about dealing with lots of things at once. Following a model proposed by the renowned computer scientist Tony Hoare, Go uses the concurrency model called Communicating Sequential Processes (CSP). Google I/O Talk Jan 3, 2024 · In this tutorial we have explained the usage of golang concurrency patterns i. . May 9, 2025 · Master Go concurrency with this hands-on guide. xtmf hpxhvp wvgd ngryd kxgumae uax hareh oxmpw dvzcn qjjawd dttx vrzjg rzuwjmi xdvtyx lbvtfeq