service
request
uint64_t count
define pyobject as "ln2/pyobject"

# - primitive type
#   - single
int16_t short_single
#   - statically sized
int16_t shorts_static[4]
#   - dynamically sized
int16_t* shorts

# - non-primitive type
#   - single
pyobject obj_req_single
#   - statically sized
pyobject obj_req_static[2]
#   - dynamically sized
pyobject* obj_req

response
double time
uint64_t count
