wehub-resource-sync
50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
'use strict';
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// Note: This file is not executed during tests. It is only used to document how
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// heap-1.heapsnapshot, heap-2.heapsnapshot, and heap-3.heapsnapshot were created,
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// and to allow recreating them in the future if necessary.
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//
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// Heap snapshots were created with this command line:
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// d8 --allow-natives-syntax snapshot_diffs.js
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function InitialObject(label, payloadSize) {
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this.kind = 'initial';
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this.label = label;
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this.payload = `${label}-` + 'x'.repeat(payloadSize);
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this.meta = {createdAt: Date.now()};
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}
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function NewObject(label, payloadSize) {
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this.kind = 'new';
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this.label = label;
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this.payload = `${label}-` + 'y'.repeat(payloadSize);
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this.extra = [1, 2, 3, 4, 5];
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}
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const refs = {
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a: new InitialObject('a', 200000),
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b: new InitialObject('b', 180000),
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keep: new InitialObject('keep', 220000),
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};
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%TakeHeapSnapshot('heap-1.heapsnapshot');
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// Drop two refs by overwriting them with new objects.
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refs.a = new NewObject('a-replacement', 210000);
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refs.b = new NewObject('b-replacement', 190000);
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%TakeHeapSnapshot('heap-2.heapsnapshot');
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// Add five more NewObject refs.
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refs.c = new NewObject('c-extra', 150000);
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refs.d = new NewObject('d-extra', 160000);
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refs.e = new NewObject('e-extra', 170000);
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refs.f = new NewObject('f-extra', 180000);
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refs.g = new NewObject('g-extra', 190000);
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%TakeHeapSnapshot('heap-3.heapsnapshot');
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print(
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'Wrote heap-1.heapsnapshot, heap-2.heapsnapshot, and heap-3.heapsnapshot',
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);
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