rafaelpernil2 / parallelpromises Goto Github PK

While trying to install this package without an existing package-lock the following error occurs:

npm ERR! code 1
npm ERR! path /home/[...]/node_modules/parallel-promises
npm ERR! command failed
npm ERR! command sh -c npx npm-force-resolutions
npm ERR! Error: ENOENT: no such file or directory, open './package-lock.json'

To recreate this error simply execute these commands:

rm -r node_modules/
rm package-lock.json
npm i 

If there are 6 tasks of 1 second each, then they will perform more than six seconds divide by concurrency, if concurrency > 1. But if the concurrency is equal to one, then the total execution time is equal to the sum of the execution time of each task.

Code.

const parallel_promises = require("parallel-promises");
const perf_hooks = require("perf_hooks");

function wait1sec() {
return new Promise((resolve, reject) => {
setTimeout(resolve, 1000);
});
}

(async () => {
const tasks = [];
for (let i = 0; i < 6; ++i) {
tasks.push({
function: wait1sec,
args: []
});
}
console.log("concurrency 1");
let start = perf_hooks.performance.now();
await parallel_promises.customPromiseAll(tasks, 1);
let end = perf_hooks.performance.now();
console.log("dt: %f", end - start);
console.log("concurrency 2");
start = perf_hooks.performance.now();
await parallel_promises.customPromiseAll(tasks, 2);
end = perf_hooks.performance.now();
console.log("dt: %f", end - start);
})();