X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=README.MD;h=249d770277c49a8a5f7e64e2b36d16cff988dbc8;hb=5648b9ca478b2493692239fc607c6593993c2c44;hp=b5f445b55e1ce86ff7abb94aef501f1773467f6f;hpb=f349ea72a3bc66250017fbe34c1ea8df173929b0;p=poolifier.git
diff --git a/README.MD b/README.MD
index b5f445b5..249d7702 100644
--- a/README.MD
+++ b/README.MD
@@ -1,7 +1,12 @@
-# Node Pool :arrow_double_up: :on:
+# Node Thread Pool :arrow_double_up: :on:
[](https://standardjs.com)
[](https://badgen.net/dependabot/dependabot/dependabot-core/?icon=dependabot)
[](https://github.com/pioardi/node-pool/actions)
+[](https://coveralls.io/github/pioardi/node-thread-pool?branch=master)
+[](http://makeapullrequest.com)
+[](https://img.shields.io/static/v1?label=dependencies&message=no%20dependencies&color=brightgreen
+)
Contents
@@ -11,6 +16,8 @@
·
API
·
+ Choose a pool
+ ·
Contribute
·
Compatibility
@@ -20,13 +27,13 @@
Overview
Node pool contains two worker-threads pool implementations , you don' t have to deal with worker-threads complexity.
-The first implementation is a static thread pool , with a defined number of threads that are started at creation time .
-The second implementation is a dynamic thread pool with a number of threads started at creation time and other threads created when the load will increase ( with an upper limit ), the new created threads will be stopped after a threshold.
+The first implementation is a static thread pool , with a defined number of threads that are started at creation time and will be reused.
+The second implementation is a dynamic thread pool with a number of threads started at creation time ( these threads will be always active and reused) and other threads created when the load will increase ( with an upper limit, these threads will be reused when active ), the new created threads will be stopped after a configurable period of inactivity.
You have to implement your worker extending the ThreadWorker class
Installation
```
-npm install node-pool --save
+npm install @pioardi/node-thread-pool --save
```
Usage
@@ -34,15 +41,17 @@ You can implement a worker in a simple way , extending the class ThreadWorker :
```js
'use strict'
-const { ThreadWorker } = require('node-pool')
+const { ThreadWorker } = require('@pioardi/node-thread-pool')
+
+function yourFunction (data) {
+ // this will be executed in the worker thread,
+ // the data will be received by using the execute method
+ return { ok: 1 }
+}
class MyWorker extends ThreadWorker {
constructor () {
- super((data) => {
- // this will be executed in the worker thread,
- // the data will be received by using the execute method
- return { ok: 1 }
- }, { maxInactiveTime: 1000 * 60})
+ super(yourFunction, { maxInactiveTime: 1000 * 60})
}
}
module.exports = new MyWorker()
@@ -52,15 +61,18 @@ Instantiate your pool based on your needed :
```js
'use strict'
-const { FixedThreadPool, DynamicThreadPool } = require('node-pool')
+const { FixedThreadPool, DynamicThreadPool } = require('@pioardi/node-thread-pool')
// a fixed thread pool
const pool = new FixedThreadPool(15,
- './yourWorker.js')
+ './yourWorker.js',
+ { errorHandler: (e) => console.error(e), onlineHandler: () => console.log('worker is online') })
// or a dynamic thread pool
const pool = new DynamicThreadPool(10, 100,
- './yourWorker.js')
+ './yourWorker.js',
+ { errorHandler: (e) => console.error(e), onlineHandler: () => console.log('worker is online') })
+
pool.emitter.on('FullPool', () => console.log('Pool is full'))
// the execute method signature is the same for both implementations,
@@ -71,11 +83,11 @@ pool.execute({}).then(res => {
```
- See examples folder for more details.
+ See examples folder for more details ( in particular if you want to use a pool for [multiple functions](./examples/multiFunctionExample.js) ).
Node versions
-You can use node version 10.x with --experimental-worker flag, or you can use an higher version (i.e 12.x)
+You can use node versions 12.x , 13.x
API
@@ -108,6 +120,15 @@ This method will call the terminate method on each worker.
`opts` (optional) An object with these properties :
- `maxInactiveTime` - Max time to wait tasks to work on ( in ms) , after this period the new worker threads will die.
+Choose your pool
+Performance is one of the main target of these thread pool implementations, we want to have a strong focus on this.
+We already have a bench folder where you can find some comparisons.
+To choose your pool consider that with a FixedThreadPool or a DynamicThreadPool ( in this case is important the min parameter passed to the constructor) your application memory footprint will increase .
+Increasing the memory footprint, your application will be ready to accept more CPU bound tasks, but during idle time your application will consume more memory.
+One good choose from my point of view is to profile your application using Fixed/Dynamic thread pool , and to see your application metrics when you increase/decrease the num of threads.
+For example you could keep the memory footprint low choosing a DynamicThreadPool with 5 threads, and allow to create new threads until 50/100 when needed, this is the advantage to use the DynamicThreadPool.
+But in general , always profile your application
+
Contribute
See guidelines [CONTRIBUTING](./.github/CONTRIBUTING.md)
@@ -115,5 +136,5 @@ See guidelines [CONTRIBUTING](./.github/CONTRIBUTING.md)
License
-[MIT](https://github.com/pioardi/node-pool/blob/master/LICENSE)
+[MIT](./LICENSE)