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test_gc_large.js
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test_gc_large.js
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console.log('=== GC Test with Large Objects ===\n');
function fmt(bytes) {
if (bytes < 1024) return bytes + ' B';
if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(2) + ' KB';
return (bytes / 1024 / 1024).toFixed(2) + ' MB';
}
let stats1 = Ant.stats();
console.log('Initial:');
console.log(' arenaUsed:', fmt(stats1.arenaUsed));
console.log(' arenaSize:', fmt(stats1.arenaSize));
console.log(' rss:', fmt(stats1.rss));
console.log('');
// Allocate large objects
let largeObjects = [];
for (let i = 0; i < 5; i++) {
let arr = new Array(1024 * 128);
for (let j = 0; j < arr.length; j += 1024) {
arr[j] = i;
}
largeObjects.push(arr);
}
let stats2 = Ant.stats();
console.log('After allocating large arrays:');
console.log(' arenaUsed:', fmt(stats2.arenaUsed));
console.log(' arenaSize:', fmt(stats2.arenaSize));
console.log(' rss:', fmt(stats2.rss));
console.log('');
// Free the objects
largeObjects = null;
let stats3 = Ant.stats();
console.log('\nAfter 3x GC:');
console.log(' arenaUsed:', fmt(stats3.arenaUsed));
console.log(' arenaSize:', fmt(stats3.arenaSize));
console.log(' rss:', fmt(stats3.rss));
console.log('');
// Allocate again - if GC worked, arena shouldn't grow much
let moreObjects = [];
for (let i = 0; i < 5; i++) {
let arr = new Array(1024 * 128);
for (let j = 0; j < arr.length; j += 1024) {
arr[j] = i;
}
moreObjects.push(arr);
}
let stats4 = Ant.stats();
console.log('After allocating another batch:');
console.log(' arenaUsed:', fmt(stats4.arenaUsed));
console.log(' arenaSize:', fmt(stats4.arenaSize));
console.log(' rss:', fmt(stats4.rss));
console.log(' arenaUsed increase from GC point:', fmt(stats4.arenaUsed - stats3.arenaUsed));
console.log('');
console.log('If arenaSize stayed same, GC reclaimed memory for reuse!');
console.log('=== Test Complete ===');

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