throat (6.0.2)
Installation
registry=npm install throat@6.0.2"throat": "6.0.2"About this package
throat
Throttle the parallelism of an asynchronous, promise returning, function / functions. This has special utility when you set the concurrency to 1. That way you get a mutually exclusive lock.
Professionally supported throat is now available
Installation
npm install throat
API
throat(concurrency)
This returns a function that acts a bit like a lock (exactly as a lock if concurrency is 1).
Example, only 2 of the following functions will execute at any one time:
const throat = require('throat')(2);
const resA = throat(async () => {
/* async stuff... */
});
const resB = throat(async () => {
/* async stuff... */
});
const resC = throat(async () => {
/* async stuff... */
});
const resD = throat(async () => {
/* async stuff... */
});
const resE = throat(async () => {
/* async stuff... */
});
throat(concurrency, worker)
This returns a function that is an exact copy of worker except that it will only execute up to concurrency times in parallel before further requests are queued:
const throat = require('throat');
const input = ['fileA.txt', 'fileB.txt', 'fileC.txt', 'fileD.txt'];
const data = Promise.all(
input.map(throat(2, (fileName) => readFile(fileName)))
);
Only 2 files will be read at a time, sometimes limiting parallelism in this way can improve scalability.
Security contact information
To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.
License
MIT
Dependencies
Development Dependencies
| ID | Version |
|---|---|
| coveralls | ^3.0.0 |
| istanbul | ^0.4.5 |
| jest | ^22.1.4 |
| promise | ^8.0.0 |
| sauce-test | ^1.0.0 |
| test-result | ^2.0.0 |
| testit | ^3.1.0 |
| typescript | ^3.4.5 |