what a difference between WriteFile into a connected socket and TransmitFile

which API function is better and why?


best weekend! (for codding:)

TransmitFile utilizes special caches, i think

from PSDK
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Remarks
The Windows NT Server/Windows 2000 Server optimizes the TransmitFile function for high performance. The Windows NT Workstation/Windows 2000 Professional optimizes the function for minimum memory and resource utilization. Expect better performance results when using TransmitFile on Windows NT Server/Windows 2000 Server.

Note TransmitFile is not functional on transports that perform their own buffering. Transports with the TDI_SERVICE_INTERNAL_BUFFERING flag set, such as ADSP, perform their own buffering. Because TransmitFile achieves its performance gains by sending data directly from the file cache. Transports that run out of buffer space on a particular connection are not handled by TransmitFile, and as a result of running out of buffer space on the connection, TransmitFile returns STATUS_DEVICE_NOT_READY.