What should I do if the executable file compiled by golang is too large?

With the continuous development of computer technology, the field of software development is also developing rapidly. Programming languages ​​are also constantly innovating to meet people's needs for efficiency and ease of use.

Among them, golang, as a programming language launched by Google, has been well known and used by the majority of developers for its efficiency, simplicity, and security.

However, when using golang for project development, we often encounter a problem: the executable file compiled by golang is too large. How could this problem arise? How to solve? This article will analyze this problem and provide feasible solutions.

1. Problem Analysis

The executable files compiled by golang are generally relatively large. There are two main reasons.

1. Static compilation

When golang compiles, all dependent libraries of the program will be included in the final executable file, which can facilitate the program to run on other machines. However, this also causes the size of the executable file to become extremely large.

2. Symbol table

Golang will generate a huge symbol table when compiling, including information about all packages, functions, variables and types. This symbol table will take up a lot of space and increase The size of the executable file.

2. Solution

Now that we have identified the root cause of expanding the executable file, we also need to propose corresponding solutions for these two reasons.

1. Static compilation

In order to reduce the size of the executable file, we can use dynamic compilation. It packages dependent libraries into link libraries and no longer writes executable files, but only needs to be loaded at runtime.

For example, we can use cgo technology to convert C/C dynamic libraries into library files available for go. In this way, we can make the program rely only on dynamic libraries instead of packaging the libraries into the executable file. This approach can greatly reduce the size of the executable file.

In addition, we can also use go mod to manage the version of the package. We can only download the required packages as needed instead of downloading all packages.

2. Symbol table

In order to reduce the size of the symbol table, we can use the strip command to remove unnecessary symbols.

The strip command can remove some unnecessary symbols from the executable file, such as debugging symbols, etc., thereby reducing the size of the executable file as much as possible.

At the same time, we can also use the UPX tool to compress executable files. UPX is an open source executable file compression tool that can compress executable files to reduce the size of the executable file.

3. Summary

The above are two ways to reduce the size of golang executable files. A better way is to use dynamic compilation, package dependent libraries into link libraries, and load them dynamically. Also pay attention to the size of the symbol table and use the strip command to remove unnecessary symbols. Finally, use UPX for compression.

These methods can not only reduce the size of the golang executable file, but also improve the running efficiency and programming efficiency of the program. I hope the above content can help golang developers better use golang to write efficient, concise and safe programs.

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