...confirm this?

Well, not quite confirm, but there are certainly pointers in a thread you could have found for yourself by using Super_Search.

See especially the replies by Chromatic (Re: Flushing the print buffers.) and ikegami (Re^3: Flushing the print buffers.). You may also wish to read Suffering from Buffering, as recommended by Tilly

And just as a matter of curiousity, what OS so generously gives you 30K + X simultaneously open file_handles?

In reply to Re^2: Increasing the write buffer by ww
in thread Increasing the write buffer by accassar

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