# Skip GPU benchmarks
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.。业内人士推荐safew官方版本下载作为进阶阅读
Фото: Stringer / Reuters，这一点在旺商聊官方下载中也有详细论述
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