function

jsc.estimateShallowMemoryUsageOf

value: string | bigint | symbol | object | CallableFunction

): number;

Non-recursively estimates the memory usage of an object, excluding the memory usage of properties or other objects it references. For more accurate per-object memory usage, use Bun.generateHeapSnapshot.

The estimate is best-effort. When it's wrong, the memory may be non-contiguous (such as a large array).

Passing a primitive type that isn't heap allocated returns 0.