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This article mainly explains "what are the advantages and disadvantages of Go language". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what are the advantages and disadvantages of Go language.

Advantages of Go

Reason 1: performanc

Go is extremely fast. Its performance is similar to that of Java or C++. In our use, Go is generally 30 times faster than Python. The following is a baseline comparison between Go and Java:

Reason 2: language performance is important

For many applications, the programming language simply acts as the glue between it and the dataset. The performance of the language itself is often irrelevant.

But Stream is an API provider that serves the Fortune 500 and more than 200 million end users. Over the years we have optimized Cassandra, PostgreSQL, Redis, and so on, but have finally reached the limits of the language we use.

Python is great, but it doesn't perform well in serialization / deserialization, sorting, and aggregation. We often encounter the problem that when Cassandra uses 1ms to retrieve data, Python needs 10ms to convert it into an object.

Reason 3: developer efficiency & Don't be too innovative

Packagemain

TypeopenWeatherMapstruct {} func (wopenWeatherMap) temperature (citystring) (float64,error) {

Resp,err:=http.Get ("http://api.openweathermap.org/data/2.5/weather?APPID=YOUR_API_KEY&q="+city)"

Iferrroomroomnil {

Return0,err

}

Deferresp.Body.Close ()

Vardstruct {

Mainstruct {

Kelvinfloat64`json: "temp" `

} `json: "main" `

}

Iferr:=json.NewDecoder (resp.Body). Decode (& d)

Return0,err

}

Log.Printf ("openWeatherMap:%s:%.2f", city,d.Main.Kelvin)

Returnd.Main.Kelvin,nil}

If you are a novice, you won't be surprised to see this code. It shows a variety of assignments, data structures, pointers, formatting, and built-in HTTP libraries.

When I am programming, I like to use the advanced features of Python very much. Python allows you to use the code you are writing creatively, for example, you can:

Use MetaClasses to self-register categories during code initialization

Replacement of true and false

Add functions to the list of built-in functions

Reload the operator in a wonderful way

There is no doubt that this code is interesting, but it also makes it difficult to understand when reading other people's work.

Go forces you to keep laying the groundwork, which makes it easy to read arbitrary code and quickly figure out what's going on.

Note: of course, how easy it is depends on your use case. If you want to create a basic CRUD API, I suggest you use Django + DRF, or Rails.

Reason 4: concurrency & channel

Go as a language is dedicated to making things simple. Instead of introducing many new concepts, it focuses on creating a simple language that is extremely fast and easy to use. Its only innovation is goroutines and channel. Goroutines is Go's lightweight thread-oriented approach, while channels are the preferred way to communicate between goroutines.

The cost of creating a Goroutines is low, requiring only a few thousand bytes of extra memory, which makes it possible to run hundreds or even thousands of goroutines at the same time. You can use the channel to achieve communication between goroutines. The Go runtime can represent all the complexity. Goroutines and the channel-based concurrency approach make it very easy to use all available CPU kernels and handle concurrent IO-- without complex development. Compared to Python/Java, running a function on a goroutine requires minimal boilerplate code. You just need to use the keyword "go" to add a function call:

Go's concurrency approach is very easy to use and interesting compared to Node; in Node, developers must pay close attention to the processing of asynchronous code.

Another excellent feature of concurrency is the race detector, which makes it easy to figure out whether a race condition exists in asynchronous code.

Reason 5: fast compile time

Currently, the compilation time of the * * microservice written in Go takes only 6 seconds. Compared with the sluggish compilation speed of Java and C++, the fast compile time of Go is a major efficiency advantage. I love fencing, but it's even better when I still remember what the code is supposed to do.

Packagemain

Import (

"fmt"

"time") funcsay (sstring) {

Fori:=0;i

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