filename.writeln() across network

[Danny Arends]

On Thursday, 21 June 2012 at 17:14:34 UTC, Regan Heath wrote:
> On Thu, 21 Jun 2012 14:56:37 +0100, Paul <phshaffer at gmail.com> 
> wrote:
>
>> I wrote a program that parses a text file and writes results 
>> as it is processing the file (i.e. many writeln()'s).  On my 
>> local harddrive it works fine.  When I later used it on a file 
>> located on a file server, it went from 500ms to 1 minute 
>> processing time.
>>
>> It there a more efficient way to write out the results that 
>> would say maybe only access the harddrive as it closes the 
>> connection...or somesuch?
>>
>> Thanks for your assistance.
>
> I imagine writeln is synchronous/non-overlapped IO.  Meaning, 
> the call to writeln doesn't return until the write has 
> "completed".  So, on every call you're basically waiting for 
> the network IO to complete before you process something else 
> locally.

Isn't the most simple approach then to build up the whole file in
memory as a single string, using \n and then do a single write
across the network ?

like:

void main(string args[]){
   string filecontent = "";
   filecontent ~= "#include std.stdio\n";
   filecontent ~= "int x = " ~ x ~ ";\n";
   //etc etc...

   auto f = new File("X:\\MyNetworkDir\\file.txt");
   f.writeln(filecontent);
   f.close();
}

Haven't tested the code, but if network IO is the wait, then just
increase the buffer..