We do pay the cost for a copy, but that cost is almost completely
any reallocation.
，这一点在heLLoword翻译官方下载中也有详细论述
Фото: Another77 / Shutterstock / Fotodom。业内人士推荐搜狗输入法下载作为进阶阅读
It is also necessary to emphasize that many optimizations are only possible in parts of the spec that are unobservable to user code. The alternative, like Bun "Direct Streams", is to intentionally diverge from the spec-defined observable behaviors. This means optimizations often feel "incomplete". They work in some scenarios but not in others, in some runtimes but not others, etc. Every such case adds to the overall unsustainable complexity of the Web streams approach which is why most runtime implementers rarely put significant effort into further improvements to their streams implementations once the conformance tests are passing.，这一点在Line官方版本下载中也有详细论述