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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import * as perfHooks from "node:perf_hooks";
import {
monitorEventLoopDelay,
performance,
PerformanceObserver,
} from "node:perf_hooks";
import { assert, assertEquals, assertThrows } from "@std/assert";
Deno.test({
name: "[perf_hooks] performance",
fn() {
assertEquals(perfHooks.performance.measure, performance.measure);
assertEquals(perfHooks.performance.clearMarks, performance.clearMarks);
assertEquals(perfHooks.performance.mark, performance.mark);
assertEquals(perfHooks.performance.now, performance.now);
assertEquals(
perfHooks.performance.getEntriesByName,
performance.getEntriesByName,
);
assertEquals(
perfHooks.performance.getEntriesByType,
performance.getEntriesByType,
);
// @ts-ignore toJSON is not in Performance interface
assertEquals(perfHooks.performance.toJSON, performance.toJSON);
perfHooks.performance.measure("test");
perfHooks.performance.mark("test");
perfHooks.performance.clearMarks("test");
perfHooks.performance.now();
assertEquals(perfHooks.performance.getEntriesByName("event", "mark"), []);
assertEquals(perfHooks.performance.getEntriesByType("mark"), []);
// @ts-ignore toJSON is not in Performance interface
perfHooks.performance.toJSON();
},
});
Deno.test({
name: "[perf_hooks] performance destructured",
fn() {
performance.measure("test");
performance.mark("test");
performance.clearMarks("test");
performance.now();
// @ts-ignore toJSON is not in Performance interface
performance.toJSON();
},
});
Deno.test({
name: "[perf_hooks] PerformanceEntry & PerformanceObserver",
fn() {
assertEquals<unknown>(perfHooks.PerformanceEntry, PerformanceEntry);
assertEquals<unknown>(perfHooks.PerformanceObserver, PerformanceObserver);
},
});
Deno.test({
name: "[perf_hooks] performance.timeOrigin",
fn() {
assertEquals(typeof performance.timeOrigin, "number");
assertThrows(() => {
// @ts-expect-error: Cannot assign to 'timeOrigin' because it is a read-only property
performance.timeOrigin = 1;
});
},
});
Deno.test("[perf_hooks]: eventLoopUtilization", () => {
const obj = performance.eventLoopUtilization();
assertEquals(typeof obj.idle, "number");
assertEquals(typeof obj.active, "number");
assertEquals(typeof obj.utilization, "number");
});
Deno.test("[perf_hooks]: monitorEventLoopDelay", async () => {
const e = monitorEventLoopDelay();
assertEquals(e.count, 0);
e.enable();
await new Promise((resolve) => setTimeout(resolve, 100));
assert(e.min > 0);
assert(e.minBigInt > 0n);
assert(e.count > 0);
e.disable();
});
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