I am trying to compare IServerXMLHTTPRequest and WinHTTP in regards to performance.
I would like to know:
- What is the maximum limit of the data/file that can be sent?
- What is the transfer rate if the file to be sent is the maximum limit?
IServerXMLHTTPRequest vs WinHTTP Performance
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For those who might be needing an information about this.
IServerXMLHTTPRequest is a thin layer above WinHTTP. Being a layer over WinHTTP means SXH will carry additional overhead. SXH doesn't provide any additional functionality over WinHTTP, other than the ability to directly support XML Document objects. source
And thus by using the WinHTTP object directly you achieve higher performance, scalability, and reduced memory consumption. source
If you are dealing with very large payloads (either posting/receiving multi-megabyte requests/responses), then use the WinHTTP Win32 API. The SXH component does not handle large data payloads efficiently--it will store all the data in a single memory buffer. The WinHTTP Win32 API allows the application to send/receive data using separate, smaller memory buffers. source