Page MenuHomePhorge
Files F3047391

bench_gc_mark_func.js
No OneTemporary
Actions

Size
3 KB
Referenced Files
None
Subscribers
None

bench_gc_mark_func.js
View Options

const now = () => (typeof performance !== 'undefined' ? performance.now() : Date.now());
function makeChildHeavyFunction(childCount) {
let src = 'return function run(seed) {\n';
for (let i = 0; i < childCount; i++) {
src += `function child_${i}(x) { return x + ${i}; }\n`;
}
src += 'let acc = seed;\n';
for (let i = 0; i < childCount; i++) {
src += `acc = child_${i}(acc);\n`;
}
src += 'return acc;\n';
src += '}';
return new Function(src)();
}
function makeTemplateHeavyFunction(siteCount) {
let src = 'function tag(strs, ...args) { return strs.length + args.length; }\n';
src += 'return function run(seed) {\n';
src += 'let acc = 0;\n';
for (let i = 0; i < siteCount; i++) {
src += `acc += tag\`${i}:\${seed}:${i}\`;\n`;
}
src += 'return acc;\n';
src += '}';
return new Function(src)();
}
function churnGarbage(rounds, width) {
const ring = new Array(8);
for (let r = 0; r < rounds; r++) {
const batch = new Array(width);
for (let i = 0; i < width; i++) {
batch[i] = {
i,
text: 'x' + i,
arr: [i, i + 1, i + 2, i + 3]
};
}
ring[r & 7] = batch;
}
return ring.length;
}
function snapshot() {
return Ant.raw.gcMarkProfile();
}
function diff(after, before) {
return {
collections: after.collections - before.collections,
funcVisits: after.funcVisits - before.funcVisits,
childEdges: after.childEdges - before.childEdges,
constSlots: after.constSlots - before.constSlots,
timeMs: after.timeMs - before.timeMs
};
}
function runCase(name, factory, opts = {}) {
const fnCount = opts.fnCount ?? 24;
const rounds = opts.rounds ?? 24;
const garbageRounds = opts.garbageRounds ?? 64;
const garbageWidth = opts.garbageWidth ?? 192;
const fns = [];
for (let i = 0; i < fnCount; i++) fns.push(factory());
Ant.raw.gcMarkProfileReset();
const before = snapshot();
let checksum = 0;
const start = now();
for (let r = 0; r < rounds; r++) {
for (let i = 0; i < fns.length; i++) checksum += fns[i](r);
churnGarbage(garbageRounds, garbageWidth);
}
const elapsed = now() - start;
const after = snapshot();
const stats = diff(after, before);
console.log(`\n[${name}]`);
console.log(`elapsed_ms=${elapsed.toFixed(2)}`);
console.log(`collections=${stats.collections}`);
console.log(`func_visits=${stats.funcVisits}`);
console.log(`child_edges=${stats.childEdges}`);
console.log(`const_slots=${stats.constSlots}`);
console.log(`mark_func_ms=${stats.timeMs.toFixed(3)}`);
console.log(`checksum=${checksum}`);
}
Ant.raw.gcMarkProfileEnable(true);
Ant.raw.gcMarkProfileReset();
runCase('child-func-heavy', () => makeChildHeavyFunction(160), {
fnCount: 20,
rounds: 22,
garbageRounds: 72,
garbageWidth: 224
});
runCase('template-slot-heavy', () => makeTemplateHeavyFunction(160), {
fnCount: 20,
rounds: 22,
garbageRounds: 72,
garbageWidth: 224
});
runCase(
'mixed',
() => {
const childHeavy = makeChildHeavyFunction(96);
const templateHeavy = makeTemplateHeavyFunction(96);
return function run(seed) {
return childHeavy(seed) + templateHeavy(seed);
};
},
{
fnCount: 20,
rounds: 22,
garbageRounds: 72,
garbageWidth: 224
}
);

File Metadata

Mime Type
application/javascript
Expires
Fri, Apr 3, 1:15 PM (1 d, 22 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
521292
Default Alt Text
bench_gc_mark_func.js (3 KB)

Event Timeline