test_bucket_props.sh

#!/bin/bash

# You may need to replace "jot" with "seq" if you're on Linux instead of OSX.
# Also, you may need to find a replacement for "uuidgen" if you don't have it.

function setprops() {
    for i in `jot 10`; do
        name="test=`uuidgen`"
        curl -v -X PUT -H "Content-Type: application/json" \
            -d '{"props":{"n_val":5}}' http://127.0.0.1:8098/riak/$name \
            > /dev/null 2>&1
    done
}

for j in `jot 10`; do
    time (setprops) 2> >(grep real)
done

Here's the output of two consecutive runs on my dev machine, starting with a fresh four-node riak cluster:

lantea:~ jerith$ ./test_bucket_props.sh 
real    0m0.525s
real    0m0.832s
real    0m1.249s
real    0m1.315s
real    0m1.300s
real    0m1.072s
real    0m1.325s
real    0m2.866s
real    0m3.833s
real    0m3.961s
lantea:~ jerith$ ./test_bucket_props.sh 
real    0m4.360s
real    0m4.727s
real    0m6.160s
real    0m4.784s
real    0m5.613s
real    0m6.763s
real    0m6.520s
real    0m6.368s
real    0m6.572s
real    0m8.858s

One very weedy dev VM, a single riak node.

real 0m5.929s
real 0m4.785s
real 0m5.327s
real 0m6.812s
real 0m7.702s
real 0m9.699s
real 0m9.341s
real 0m10.275s
real 0m11.703s
real 0m12.132s