Dropbear Server cpu load

[Togg]

Hi all,

I am running dropbear daemon on a xscale ixp425 platform (~500 BogoMips) and
I have the problem that I only get 200kbyte/s speed during scp to the
dropbear machine. While transfer dropbear uses 100% cpu.

In options.h i've optimized for size, but not too aggressively. 
I undefined dropbear_small_code, no_fast_exptmod, dropbear_blowfish_cbs,
twofish_cbc and only let aes128 and 3des defined. Dropbear_md5_hmac is also
undefined, the rest is default. 

Any hints? How can I improve speed for filetransfer?

Togg