强制把所有写入的数据都缓冲到内存中。 当调用 stream.uncork()stream.end() 时,缓冲的数据才会被输出。

当写入大量小块数据到流时,内部缓冲可能失效,从而导致性能下降, writable.cork() 主要用于避免这种情况。 对于这种情况,实现了 writable._writev() 的流可以用更优的方式对写入的数据进行缓冲。

The writable.cork() method forces all written data to be buffered in memory. The buffered data will be flushed when either the stream.uncork() or stream.end() methods are called.

The primary intent of writable.cork() is to avoid a situation where writing many small chunks of data to a stream do not cause a backup in the internal buffer that would have an adverse impact on performance. In such situations, implementations that implement the writable._writev() method can perform buffered writes in a more optimized manner.

See also: writable.uncork().