Large files downloading issue #2 about downloader

[abhay991]

i guess currently i am having same issue with this.

[pgd19900]

I'm working on the big file download using this program, but the big file download cardon problem is really a headache.

[pgd19900]

Hi, Can you provide email contact.

[Toqe]

@pgd19900 I don't know what you mean by "cardon" / "caton", please explain with an example. If your question for email contact is if I provide free support for this software, the answer is no.

I haven't investigated this problem in depth, but to me it looks like that when a download of a huge file is created and the first part is written near the end of the file, this causes the Windows I/O system to allocate memory for the complete file, which takes some time.

So you may try creating the file in a more efficient way before the download starts (see https://stackoverflow.com/questions/1881050/creating-a-huge-dummy-file-in-a-matter-of-seconds-in-c-sharp for example), but I don't think this will stop the freeze alltogether.

If you really want a freeze-free solution, in my opinion you have to write your own DownloadToFileSaver that creates the full file on startup, but doesn't block on that. While the full file is created, it needs to temporarily save the already downloaded parts to some other storage/file and keep track of that. Then when the full file is completely created, the Saver needs to store the already downloaded parts and the correct position in the full file and from then on writes newly downloaded chunks directly to the fulll file.