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import fs from 'fs/promises';
import { fileURLToPath } from 'url';
import autocannon from 'autocannon';
import { execaCommand } from 'execa';
import { waitUntilBusy } from 'port-authority';
import { markdownTable } from 'markdown-table';
import pb from 'pretty-bytes';
import { astroBin } from './_util.js';
const port = 4321;
export const defaultProject = 'server-stress-default';
/**
* @param {URL} projectDir
* @param {URL} outputFile
*/
export async function run(projectDir, outputFile) {
const root = fileURLToPath(projectDir);
console.log('Building...');
await execaCommand(`${astroBin} build`, {
cwd: root,
stdio: 'inherit',
});
console.log('Previewing...');
const previewProcess = execaCommand(`${astroBin} preview --port ${port}`, {
cwd: root,
stdio: 'inherit',
});
console.log('Waiting for server ready...');
await waitUntilBusy(port, { timeout: 5000 });
console.log('Running benchmark...');
const result = await benchmarkCannon();
console.log('Killing server...');
if (!previewProcess.kill('SIGTERM')) {
console.warn('Failed to kill server process id:', previewProcess.pid);
}
console.log('Writing results to', fileURLToPath(outputFile));
await fs.writeFile(outputFile, JSON.stringify(result, null, 2));
console.log('Result preview:');
console.log('='.repeat(10));
console.log(`#### Server stress\n\n`);
console.log(printResult(result));
console.log('='.repeat(10));
console.log('Done!');
}
/**
* @returns {Promise<import('autocannon').Result>}
*/
async function benchmarkCannon() {
return new Promise((resolve, reject) => {
const instance = autocannon(
{
url: `http://localhost:${port}`,
connections: 100,
duration: 30,
pipelining: 10,
},
(err, result) => {
if (err) {
reject(err);
} else {
// @ts-expect-error untyped but documented
instance.stop();
resolve(result);
}
}
);
autocannon.track(instance, { renderResultsTable: false });
});
}
/**
* @param {import('autocannon').Result} output
*/
function printResult(output) {
const { latency: l, requests: r, throughput: t } = output;
const latencyTable = markdownTable(
[
['', 'Avg', 'Stdev', 'Max'],
['Latency', `${l.average} ms`, `${l.stddev} ms`, `${l.max} ms`],
],
{
align: ['l', 'r', 'r', 'r'],
}
);
const reqAndBytesTable = markdownTable(
[
['', 'Avg', 'Stdev', 'Min', 'Total in 30s'],
['Req/Sec', r.average, r.stddev, r.min, `${(r.total / 1000).toFixed(1)}k requests`],
['Bytes/Sec', pb(t.average), pb(t.stddev), pb(t.min), `${pb(t.total)} read`],
],
{
align: ['l', 'r', 'r', 'r', 'r'],
}
);
return `${latencyTable}\n\n${reqAndBytesTable}`;
}
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