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General Published on: Mon May 01 2023

What is Golang and How Concurrency Compliment it?

What is Golang?

Golang, also known as Go, is a programming language that was created by Google in 2007. Since then, it has become one of the most popular languages for building high-performance applications. In this article, we will discuss some of the features that make Golang stand out and why you should consider using it for your next project.

Features of Golang

1. Concurrency - Concurrency is one of the most significant advantages of Golang. The language was designed to make it easy to write efficient and scalable concurrent programs. It provides built-in support for concurrency through Goroutines and channels. Goroutines are lightweight threads that allow developers to run multiple functions concurrently. Channels are used to communicate between Goroutines, making it easy to write programs that can handle multiple tasks at once.

2. Simplicity - Simplicity is another advantage of Golang. The language was designed with simplicity in mind, making it easy to learn and write code. Golang has a minimalistic syntax that is easy to read and understand. It also has a small set of keywords, making it less prone to errors and easier to maintain.

3. Performance - Golang is known for its excellent performance. The language was designed to take advantage of modern hardware architectures, making it efficient and fast. Golang has a built-in garbage collector, which helps manage memory allocation and reduces the risk of memory leaks. The language also compiles directly to machine code, making it faster than interpreted languages like Python.

4. Compatibility - Golang is compatible with multiple operating systems, including Windows, macOS, and Linux. The language also supports cross-compilation, making it easy to build applications for different platforms. Golang's compatibility makes it a versatile language, suitable for a wide range of applications.

5. Standard Library - Golang has a robust standard library that provides developers with a wide range of tools to build applications. The standard library includes packages for networking, encryption, file handling, and more. The packages are well-documented and easy to use, making it easier for developers to build reliable and efficient applications.

6. Community Support - Golang has a large and active community of developers who contribute to the language's development and provide support to other developers. The community provides resources, tools, and frameworks that make it easier to develop applications in Golang. This community support makes it easier for developers to learn and work with the language.

Golang is a powerful and efficient programming language that provides developers with a wide range of tools to build modern applications. Its simplicity, concurrency, performance, compatibility, standard library, and community support make it a great choice for building high-performance applications.

Out of the above features, Concurrency is one of the most significant features of Golang, which is explained in detail:

Concurrency in Golang

Modern software development requires concurrency because it allows for the execution of numerous tasks simultaneously. In high-performance systems, where processing speed must keep up with the rate of incoming input, concurrency is very important. Go (also known as Golang) is a programming language that has built-in support for concurrency, which we are going to examine here.

Understanding the distinction between concurrency and parallelism is essential before discussing concurrency ideas:

Concurrency vs Parallelism

Concurrency and parallelism are related concepts that refer to the execution of multiple tasks or processes at the same time. However, there are some differences between the two:

Concurrency refers to the ability of multiple tasks to make progress simultaneously. In other words, it means that several tasks can be started, carried out, and finished separately from one another, though not always at the same time. The jobs do not operate concurrently; they alternate between running on a single CPU or several processors. 

Use: When there are several tasks that need to be completed but not all of them demand a lot of processing power, concurrency is frequently used.

On the other hand, parallelism describes the capacity to carry out several tasks concurrently on a number of processors or cores. In other words, it indicates that several jobs are truly running at the same time.

Use: Parallelism is often used in situations where there are fewer tasks, but where each task requires a lot of processing power.

Concurrency concepts in Golang

Concurrency support was built into Go from the ground up. It provides a variety of capabilities that make creating concurrent programs simple. 

Goroutines are Golang's concurrency model's key component. A goroutine is a lightweight thread that runs concurrently with other goroutines in the same programme. Although goroutines and threads are similar, goroutines are substantially lighter and use fewer resources.

To construct a new goroutine, use the go keyword like, go Hexaview()

The calling function and the function will both run simultaneously. When a GO routine is started, unlike the normal function it doesn’t wait for it to return. Instead, the GO routine is immediately returned, and control is then transferred to the line after that.


Golang also provides a mechanism for communication between goroutines called channels. A channel is a typed conduit through which you can send and receive values with the channel <- and <-channel syntax. Channels ensure that data is passed between goroutines safely, avoiding race conditions and other synchronization issues.

As the connection is by nature bidirectional, the same channel can be used to send and receive values. The chan keyword can be used to construct it.

Here is an example of using channels in Golang:


In this example, the Hexaview () function sends the message "Hello from HVT goroutine" to the channel c. The main () function then receives the message from the channel and prints it to the console. Channels are a powerful tool for managing communication between goroutines and ensuring safe concurrent access to shared resources. 


Sometimes you need to ensure that only one goroutine can access a shared resource at a time. Golang provides a mechanism for this called a mutex. A mutex is a mutual exclusion lock that allows only one goroutine to access a shared resource at a time. The sync package provides the Mutex type that you can use to create a Mutex.

Here is an example of using a mutex in Golang:


In this example, the increment() function increments the count variable while holding the mutex. The main() function creates ten goroutines that call the increment() function concurrently. The defer mutex. Unlock() statement ensures that the mutex is released even if the function panics. Without the mutex, the output of this program could be unpredictable and vary each time it's run. With the mutex, we ensure that the count variable is incremented correctly, and the output is consistent. 


Concurrency is an essential feature of modern software development, and Golang provides a set of features that make it easy to write concurrent programs. Goroutines, channels, and mutexes are some of the most important features of Golang's concurrency model. Goroutines enable us to execute multiple tasks simultaneously, while channels allow us to communicate safely between goroutines. Mutexes prevent race situations and synchronization problems by limiting the number of goroutines that can access a shared resource at once.

Golang is a wonderful option for high-performance systems that demand quick processing of incoming data due to its built-in concurrency support. Developers can create scalable, dependable, and efficient programs by utilizing the concurrency model in Golang.

If you're looking for a language that is easy to learn, efficient, and scalable, Golang is an excellent choice.


Vanshika Jain

Application Engineer

Vanshika is an AWS Certified Solution Architect Associate, working on Golang. She likes to spend her time learning other AWS services and new Golang features, along with Power tools like PowerApps and Power Automate.