Re: [freenet-devl] integrating zlib compression into freenet

[Chris Anderson]

On Sun, 29 Apr 2001, Stefan Reich wrote:

> ----- Original Message ----- 
> From: "Mr.Bad" <[EMAIL PROTECTED]>
> >     SR> There's a reason why all modern modem protocols contain
> >     SR> compression after all.
> > 
> > There's also a reason they have automatic control mechanisms to turn
> > compression off. B-)
> 
> It would still be faster if they didn't.
> 

It's a simple eq, compress time + xfer time( compressed data ) vs xfer
time( data ).  If you get 50% compression you save 50% of xfer time, so if
you bandwidth is 64 kbs, your compressor better be faster than 32 kbs.  
Most compressors are in the Mbytes/sec range.  Anyway, compression is
turned off to reduce latency more often than not.  Note that lz is
extremely fast on the unzip side.


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