npm install throat
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); // alternatively provide your own promise implementation const throat = require('throat')(require('promise'))(2); const promise = Promise.resolve(); const resA = throat(() => /* async stuff... */ promise); const resB = throat(() => /* async stuff... */ promise); const resC = throat(() => /* async stuff... */ promise); const resD = throat(() => /* async stuff... */ promise); const resE = throat(() => /* async stuff... */ promise);
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'); // alternatively provide your own promise implementation const throat = require('throat')(require('promise')); 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.
To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.
MIT