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'use strict';
const common = require('../common.js');
const { AsyncLocalStorage, AsyncResource } = require('async_hooks');
/**
* This benchmark verifies the performance degradation of
* async resource propagation on the increasing number of
* active `AsyncLocalStorage`s.
*
* - AsyncLocalStorage.run() * storageCount
* - new AsyncResource()
* - new AsyncResource()
* ...
* - N new Asyncresource()
*/
const bench = common.createBenchmark(main, {
storageCount: [0, 1, 10, 100],
n: [1e3],
});
function runStores(stores, value, cb, idx = 0) {
if (idx === stores.length) {
cb();
} else {
stores[idx].run(value, () => {
runStores(stores, value, cb, idx + 1);
});
}
}
function runBenchmark(n) {
for (let i = 0; i < n; i++) {
new AsyncResource('noop');
}
}
function main({ n, storageCount }) {
const stores = new Array(storageCount).fill(0).map(() => new AsyncLocalStorage());
const contextValue = {};
runStores(stores, contextValue, () => {
bench.start();
runBenchmark(n);
bench.end(n);
});
}
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