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test_gc_coro.js
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test_gc_coro.js
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// Simulate TUI-like behavior: async handler with lots of string allocations
function stripAnsi(str) {
return str.replace(/\x1b\[[0-9;]*m/g, '');
}
function pad(str, len) {
const visible = stripAnsi(str).length;
const diff = len - visible;
if (diff <= 0) return str;
return str + ' '.repeat(diff);
}
function render() {
// Simulate TUI render - matches what tui.js does
const width = 120;
const height = 40;
const lines = [];
// Clear buffer
for (let y = 0; y < height; y++) {
lines.push(' '.repeat(width));
}
// Draw styled content (like the TUI does)
for (let y = 0; y < height; y++) {
let text = `\x1b[38;5;196mRow ${y}\x1b[0m: `;
text += `\x1b[38;5;82m${'█'.repeat(20)}\x1b[0m`;
text += `\x1b[2m${'░'.repeat(20)}\x1b[0m`;
text = pad(text, width);
lines[y] = text;
}
return lines.join('\n');
}
async function handleEvent(n) {
// Simulate multiple renders per event (like scrolling does)
for (let i = 0; i < 10; i++) {
render();
}
}
let count = 0;
const interval = setInterval(() => {
count++;
handleEvent(count);
const s = Ant.stats(), a = s.alloc, M = 1024 * 1024;
const total = (s.pools.totalUsed + a.total) / M;
console.log(
`tick ${count}: pools ${(s.pools.totalUsed/M).toFixed(1)}MB obj ${(a.objects/M).toFixed(1)}MB shp ${(a.shapes/M).toFixed(1)}MB arr ${(a.arrays/M).toFixed(1)}MB refs ${(a.propRefs/M).toFixed(1)}MB cls ${(a.closures/M).toFixed(1)}MB uv ${(a.upvalues/M).toFixed(1)}MB ov ${(a.overflow/M).toFixed(1)}MB | ${total.toFixed(1)}MB rss ${(s.rss/M).toFixed(1)}MB`
);
if (count >= 500) {
clearInterval(interval);
setTimeout(() => {
const a = Ant.stats();
console.log(`done: total ${((a.pools.totalUsed + a.alloc.total) / 1024 / 1024).toFixed(1)}MB`);
}, 10);
}
}, 10); // 500 * 10ms = 5 seconds

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