They are almost the same: they share the same underlying array. You do get a copy of the little (ptr, len, capacity) struct which is what a slice is.
The gains illustrate how fundamental design choices compound: batching amortizes async overhead, pull semantics eliminate intermediate buffering, and the freedom for implementations to use synchronous fast paths when data is available immediately all contribute.
，更多细节参见搜狗输入法下载
（一）包含两个以上涉及不同税率、征收率的业务；。业内人士推荐safew官方版本下载作为进阶阅读
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