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37 lines
896 B
JavaScript
37 lines
896 B
JavaScript
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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"use strict";
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function allocTest(alloc, allocAssert, deallocAssert) {
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// Helper func that GCs then returns memory usage
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const sample = () => {
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// deno-lint-ignore no-undef
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gc();
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return Deno.memoryUsage();
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};
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const delta = (t1, t2) => t2.heapUsed - t1.heapUsed;
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// Sample "clean" heap usage
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const t1 = sample();
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// Alloc
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// deno-lint-ignore no-unused-vars
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let x = alloc();
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const t2 = sample();
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allocAssert(delta(t1, t2));
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// Free
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x = null;
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const t3 = sample();
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deallocAssert(delta(t2, t3));
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}
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function main() {
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// Large-array test, 1M slot array consumes ~4MB (4B per slot)
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allocTest(
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() => new Array(1e6),
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(delta) => console.log("Allocated:", Math.round(delta / 1e6) + "MB"),
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(delta) => console.log("Freed:", Math.round(delta / 1e6) + "MB"),
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);
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}
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main();
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