They become much smaller if you strip them.
Doesn't seem to be packaged for Vix, but there must be one around somewhere (I suspect the one from a Debian mips system would work...)
EDIT (fyi):
It turns out that a strip is built that runs on the native architecture of the build, but works on binaries of the architecture of the box build-for.
So, for my et8000 I get this Intel-x64 binary:
oe-alliance/builds/openvix/developer/et8000/tmp/work/et8000-oe-linux/linux-etxx00/linux-etxx00-4.10.6-.4/recipe-sysroot-native/usr/bin/mipsel-oe-linux/mipsel-oe-linux-strip
which strips mips binaries when run on Ubuntu.