// Create a view into the consumer's buffer and fill it
Stream implementations can and do ignore backpressure; and some spec-defined features explicitly break backpressure. tee(), for instance, creates two branches from a single stream. If one branch reads faster than the other, data accumulates in an internal buffer with no limit. A fast consumer can cause unbounded memory growth while the slow consumer catches up — and there's no way to configure this or opt out beyond canceling the slower branch.，这一点在heLLoword翻译官方下载中也有详细论述
There’s a saying that “abstractions are always leaky”.，详情可参考搜狗输入法2026
Step through the construction below. Each time a new point is inserted, watch the tree decide whether it needs to split a region: