wehub-resource-sync
36 lines
1.1 KiB
TypeScript
36 lines
1.1 KiB
TypeScript
/**
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* Fast object-tree size estimator — walks without JSON.stringify.
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* Safe for circular references (uses WeakSet).
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* Early-exits at 256KB to avoid wasting CPU on huge payloads.
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*/
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export function estimateSizeFast(value: unknown): number {
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let bytes = 0;
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const stack: unknown[] = [value];
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const seen = new WeakSet();
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while (stack.length > 0) {
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const v = stack.pop();
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if (v === null || v === undefined) continue;
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if (typeof v === "string") {
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bytes += v.length;
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if (bytes > 262144) return bytes;
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} else if (typeof v === "number") bytes += 8;
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else if (typeof v === "boolean") bytes += 4;
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else if (typeof v === "object") {
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if (seen.has(v as object)) continue;
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seen.add(v as object);
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if (Array.isArray(v)) {
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for (let i = 0; i < v.length; i++) stack.push(v[i]);
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} else {
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for (const key in v) {
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if (Object.prototype.hasOwnProperty.call(v, key)) stack.push((v as Record<string, unknown>)[key]);
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}
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}
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}
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}
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return bytes;
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}
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export function isSmallEnoughForSemanticCache(value: unknown): boolean {
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return estimateSizeFast(value) <= 256 * 1024;
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}
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