The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
The future of many objects, including whether they will stay in storage or be displayed, is still undecided, along with their ownership.
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The immediate benefit is obvious — no more plaintext secrets on disk. But there are a few less obvious wins.
Prototype pollution defense: One test patches Object.prototype.then to intercept promise resolutions, then verifies that pipeTo() and tee() operations don't leak internal values through the prototype chain. This tests a security property that only exists because the spec's promise-heavy internals create an attack surface.
本质上，基于 AppFunctions 的实现方式，和过去的 API 路径逻辑相同。这是一种「打好了招呼」的解题思路。