Dear all,

My app is writing a file to a SMB share under windows 7.

It takes about 30s to write a 4MB file, whereas copying a 180MB file with
explorer takes 2s, so there is clearly a performance issue.

When the 4MB file is written to a local folder, it's done almost instantly
(~100ms).

What could be the problem? As initially the file was written by very small
chunks (line by line, this is a log file), I added a buffer so that it is
written by 256kB chunks, but this does not change anything.

Any idea?

Qt 5.4.1, mingw-builds w64 4.9.1

Thanks!

Etienne
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