Created
August 13, 2025 03:06
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Calculate Memory Size of a JS Object
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| function memorySizeOf(obj: any) { | |
| const seen = new WeakSet<object>(); | |
| function sizeOf(value: any): number { | |
| if (value === null || value === undefined) return 0; | |
| const t = typeof value; | |
| if (t === "number" ) return 8; | |
| if (t === "boolean") return 4; | |
| if (t === "bigint" ) return 8; | |
| if (t === "string" ) return new TextEncoder().encode(value).length; | |
| if (t === "function" || t === "symbol") return 0; | |
| if (value instanceof ArrayBuffer) return value.byteLength; | |
| if (ArrayBuffer.isView(value)) return (value as ArrayBufferView).byteLength || 0; | |
| if (t === "object") { | |
| if (seen.has(value)) return 0; | |
| seen.add(value); | |
| let total = 0; | |
| if (Array.isArray(value)) { | |
| for (const item of value) total += sizeOf(item); | |
| return total; | |
| } | |
| for (const [k, v] of Object.entries(value)) { | |
| total += sizeOf(k); | |
| total += sizeOf(v); | |
| } | |
| return total; | |
| } | |
| return 0; | |
| } | |
| return sizeOf(obj); | |
| } |
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