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import { dns } from "bun";
import { bench, run, group } from "mitata";
async function forEachBackend(name, fn) {
group(name, () => {
for (let backend of [
"libc",
"c-ares",
process.platform === "darwin" ? "system" : "",
].filter(Boolean))
bench(backend, fn(backend));
});
}
forEachBackend("dns.lookup remote x 50", (backend) => async () => {
const run = () =>
dns
.lookup(Math.random().toString(16) + ".example.com", { backend })
.catch(() => {});
var remain = 16;
var done;
await new Promise((resolve) => {
for (var i = 0; i < 16; i++)
run().finally(() => {
remain--;
if (remain === 0) {
done();
}
});
done = resolve;
});
});
forEachBackend("(cached) dns.lookup remote x 50", (backend) => {
var tld = "example.com";
const run = () => dns.lookup(tld, { backend }).catch(() => {});
return async () => {
const total = 50;
var remain = total;
var done;
await new Promise((resolve) => {
for (var i = 0; i < total; i++)
run().finally(() => {
remain--;
if (remain === 0) {
done();
}
});
done = resolve;
});
};
});
forEachBackend(
"(cached in batch) dns.lookup remote x 50",
(backend) => async () => {
var tld = Math.random().toString(16) + ".example.com";
const run = () => dns.lookup(tld, { backend }).catch(() => {});
const total = 50;
var remain = total;
var done;
await new Promise((resolve) => {
for (var i = 0; i < total; i++)
run().finally(() => {
remain--;
if (remain === 0) {
done();
}
});
done = resolve;
});
},
);
await run();
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