Choice of block size for file-sharing

[pukkamustard]

Hello GNUnet,

I am interested in the reasons for using a block size of 32kB in 
the
file-sharing application [1].

In the paper "Efficient Sharing of Encrypted Data (2002)" [2] 
arguments
are made for using a block size of 1kB:

> One could argue that a size of 1k is far too small. The 
> rationale
> behind thisfile size is that UDP, the transport mechanism used
> bygnunet has (on Ethernet)an optimal packet size that is 
> slightly
> above 1k. Asgnunet must add headers tothe packets, the size
> approximates this number. Furthermore, many file systemscan be
> formatted with a block-size of 1k.

In "An Encoding for Censorship-Resistant Sharing (2003)" the block 
size
32kB is used without giving concrete arguments (or I missed them).

Is there a rationale for using 32kB? What are the experiences whit 
using
this block size? Would you use a different size today?

I initially posted this question on IRC. Thanks to @tg and @dvn 
for the
input and pointing me here.

-pukkamustard


[1] https://git.gnunet.org/gnunet.git/tree/src/fs/fs.h#n37
[2] https://grothoff.org/christian/esed.pdf
[3] https://grothoff.org/christian/ecrs.pdf