perf: 300명 실시간 부하 측정 도구를 추가

2026-08-16 18:05:55 +00:00
parent eb47de0e76
commit 54126cd67f
18 changed files with 1387 additions and 0 deletions
@@ -0,0 +1,42 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { PhaseMetrics, percentile, summarizeDistribution, summarizePhaseMetrics } from '../src/metrics.js';
+
+void test('nearest-rank percentiles and summaries are deterministic', () => {
+    const values = [100, 1, 5, 3, 2, 4];
+    const sorted = [...values].sort((left, right) => left - right);
+    assert.equal(percentile(sorted, 50), 3);
+    assert.equal(percentile(sorted, 95), 100);
+    assert.deepEqual(summarizeDistribution(values), {
+        count: 6,
+        min: 1,
+        max: 100,
+        mean: 19.167,
+        p50: 3,
+        p95: 100,
+        p99: 100,
+    });
+});
+
+void test('phase aggregation separates success, error, latency, and event counters', () => {
+    const metrics = new PhaseMetrics();
+    metrics.recordHttp('own', 10, null);
+    metrics.recordHttp('own', 20, 'http-500');
+    metrics.recordSseEvent('ready');
+    metrics.recordSseEvent('ready');
+    metrics.recordHttpResult('own', 'unchanged');
+    metrics.processRssBytes.push(100, 200);
+    metrics.sseActiveConnections.push(0, 2);
+    const summary = summarizePhaseMetrics(metrics, {
+        cpuPercentOfOneCore: 5,
+        rssBytes: summarizeDistribution(metrics.processRssBytes),
+        eventLoopLagMs: { min: 1, max: 2, mean: 1.5, p50: 1, p95: 2, p99: 2 },
+    });
+    assert.deepEqual(summary.http.success, { own: 1 });
+    assert.deepEqual(summary.http.errors, { 'own:http-500': 1 });
+    assert.deepEqual(summary.http.results, { 'own:unchanged': 1 });
+    assert.equal(summary.http.latencyMs.own?.p50, 10);
+    assert.deepEqual(summary.sse.events, { ready: 2 });
+    assert.equal(summary.sse.activeConnections.max, 2);
+});