Uploading files is faster in Windows Internet Explorer 7

This article describes how Microsoft has improved the performance of the HTTP file upload algorithm in Windows Internet Explorer 7. Uploading files is faster in Internet Explorer 7.

Internet Explorer 7 improves the way that large files are uploaded when you use the HTTP file upload feature. In earlier versions of Internet Explorer, an upload operation may take a long time to finish when you upload a file that is larger than one megabyte. Internet Explorer 7 uses an improved algorithm to perform the upload operation of an HTTP POST request.

For more information about the problem in earlier versions of Internet Explorer, click the following article number to view the article in the Microsoft Knowledge Base: The HTTP file upload feature is documented in RFC 1867, "Form-based File Upload in HTML." To view this document, visit the following Internet Engineering Task Force (IETF) Web site: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

You can use the INPUT type=file element to upload files from a Web page. For more information about this element, visit the following Microsoft Developer Network (MSDN) Web site: For more information about the HTTPSendRequest function, visit the following Microsoft Developer Network (MSDN) Web site: