ants

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<b>A goroutine pool for Go</b>
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English | [中文](README_ZH.md)

## 📖 Introduction

Library `ants` implements a goroutine pool with fixed capacity, managing and recycling a massive number of goroutines, allowing developers to limit the number of goroutines in your concurrent programs.

## 🚀 Features:

- Managing and recycling a massive number of goroutines automatically
- Purging overdue goroutines periodically
- Abundant APIs: submitting tasks, getting the number of running goroutines, tuning the capacity of the pool dynamically, releasing the pool, rebooting the pool, etc.
- Handle panic gracefully to prevent programs from crash
- Efficient in memory usage and it may even achieve ***higher performance*** than unlimited goroutines in Go
- Nonblocking mechanism
- Preallocated memory (ring buffer, optional)

## 💡 How `ants` works

### Flow Diagram

<p align="center">
<img width="1011" alt="ants-flowchart-en" src="https://user-images.githubusercontent.com/7496278/66396509-7b42e700-ea0c-11e9-8612-b71a4b734683.png">
</p>

### Activity Diagrams

![](https://raw.githubusercontent.com/panjf2000/illustrations/master/go/ants-pool-1.png)

![](https://raw.githubusercontent.com/panjf2000/illustrations/master/go/ants-pool-2.png)

![](https://raw.githubusercontent.com/panjf2000/illustrations/master/go/ants-pool-3.png)

![](https://raw.githubusercontent.com/panjf2000/illustrations/master/go/ants-pool-4.png)

## 🧰 How to install

### For `ants` v1

``` powershell
go ge