30 lines
1.6 KiB
JavaScript
30 lines
1.6 KiB
JavaScript
#!/usr/bin/env node
|
|
// Compare local /api/version latency with request monitoring enabled and disabled.
|
|
// Start two otherwise identical server instances and set OPS_BASE_URL/OPS_ENABLED_URL.
|
|
const urls = { disabled: process.env.OPS_BASE_URL, enabled: process.env.OPS_ENABLED_URL };
|
|
if (!urls.disabled || !urls.enabled) {
|
|
console.error('Set OPS_BASE_URL and OPS_ENABLED_URL to local server URLs.');
|
|
process.exit(2);
|
|
}
|
|
const samples = { disabled: [], enabled: [] };
|
|
async function request(url) {
|
|
const start = performance.now();
|
|
const response = await fetch(`${url}/api/version`);
|
|
await response.arrayBuffer();
|
|
if (!response.ok) throw new Error(`${url} returned HTTP ${response.status}`);
|
|
return performance.now() - start;
|
|
}
|
|
for (const key of Object.keys(urls)) for (let i = 0; i < 30; i++) await request(urls[key]);
|
|
for (let i = 0; i < 500; i++) {
|
|
for (const key of i % 2 ? ['enabled', 'disabled'] : ['disabled', 'enabled']) samples[key].push(await request(urls[key]));
|
|
}
|
|
const percentile = (values, p) => [...values].sort((a, b) => a - b)[Math.ceil(values.length * p) - 1];
|
|
const result = Object.fromEntries(Object.entries(samples).map(([key, values]) => [key, {
|
|
requests: values.length,
|
|
p50Ms: Number(percentile(values, .5).toFixed(3)),
|
|
p95Ms: Number(percentile(values, .95).toFixed(3)),
|
|
meanMs: Number((values.reduce((a, b) => a + b, 0) / values.length).toFixed(3)),
|
|
}]));
|
|
console.log(JSON.stringify({ route: '/api/version', pairs: samples.disabled.length, result,
|
|
meanDeltaPercent: Number(((result.enabled.meanMs / result.disabled.meanMs - 1) * 100).toFixed(2)) }, null, 2));
|