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This fragmentation hurts portability. Code that performs well on one runtime may behave differently (or poorly) on another, even though it's using "standard" APIs. The complexity burden on runtime implementers is substantial, and the subtle behavioral differences create friction for developers trying to write cross-runtime code, particularly those maintaining frameworks that must be able to run efficiently across many runtime environments.
，这一点在旺商聊官方下载中也有详细论述
await blocking.writer.write(chunk2); // ok。搜狗输入法下载对此有专业解读
（一）非正常损失的购进货物，以及与之相关的加工修理修配服务和交通运输服务；