Does golang not have gc?

Golang doesn’t have GC? ——Garbage collection mechanism based on go language features

Go language is a static compiled programming language, which was developed by Google and released in 2009. Unlike many other programming languages, Go language has its own garbage collection mechanism, which frees developers from the tedious task of memory management. However, some people believe that Golang has no garbage collection mechanism. This article will discuss this point of view.

Introduction to the garbage collection mechanism

The garbage collection mechanism is a mechanism for programs to automatically manage memory space, and is an important way to solve dynamic memory management. It automatically detects memory space that is no longer used and releases it, thereby avoiding problems such as memory leaks and making the program more stable and reliable.

In the traditional garbage collection mechanism, the program will regularly check the memory space, scan and mark the garbage that is no longer used, and then recycle it. In contrast, the Go language adopts a garbage collection mechanism based on reachability analysis, which means that the program will perform memory management based on the reference relationship between objects, and can detect, track and recycle garbage that is no longer used in a timely manner at runtime.

Golang’s garbage collection mechanism

The above content shows that the Go language does use a garbage collection mechanism. Specifically, Golang garbage collection mechanism:

1. Based on reachability analysis;
2. Adaptive concurrency;
3. Based on mark-clear algorithm or mark-collation algorithm ;
4. Calculate the number of surviving objects and optimize the space.

It is worth noting that the garbage collector of the Go language uses an intelligent and efficient way to perform garbage collection. It analyzes memory allocation patterns in order to reduce the amount of data that needs to be processed when recycling, without placing an excessive burden on the entire system by running a separate thread of the garbage collector.

However, just like the garbage collection mechanism of other languages, Golang's garbage collection mechanism also has shortcomings. Since the Go language uses the garbage collection mechanism of reachability analysis, there may be situations where the program needs to wait for garbage collection before memory allocation. In addition, it is also prone to memory fragmentation issues.

Therefore, in order to avoid these problems, developers need to carefully evaluate the needs and uses of the project, and flexibly adjust the garbage collection mechanism parameters to meet different memory management needs.

Conclusion

In short, Go language’s understanding of the garbage collection mechanism initially caused a lot of controversy, but in fact, Golang is a programming language that advocates the use of garbage collection mechanism. Although it has shortcomings, in practice it has proven to be an effective and efficient garbage collection mechanism. Therefore, for developers who prefer to still manage memory manually, they need to seriously consider whether they need the help of a garbage collection mechanism when using the Go language.

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