Ben, thanks for the reply. I have a doubt that its just a hint, because how 
come it is exactly 40960 bytes every time. The underlying filesystem is a 
custom coded one, which WILL return the exact number of bytes that were 
asked for. Line 38 for /lib/fs.js says:

var kPoolSize = 40 * 1024;

Do you think changing it to 128 * 1024 will change anything?

 - Gill

On Thursday, 2 August 2012 16:29:43 UTC-7, Ben Noordhuis wrote:
>
> On Thu, Aug 2, 2012 at 9:21 PM, Gill <[email protected]> wrote: 
> > I have a code where the NodeJS server reads a file and streams it to 
> > response, it looks like: 
> > 
> > var fStream = fs.createReadStream(filePath, {'bufferSize': 128 * 1024}); 
> > fStream.pipe(response); 
> > 
> > The issue is, Node reads the file exactly 40960 bytes a time. However, 
> my 
> > app would be much more efficient (due to reasons not applicable to this 
> > question), if it reads 131072 (128 * 1024) bytes at a time. 
> > 
> > Is there a way to force Node to read 128 * 1024 bytes at a time from the 
> > stream? 
> > 
> > Thanks in advance! 
>
> No. bufferSize is a hint, not an imperative. It's up to the operating 
> system to honor it. 
>

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