r2pipe python-async seems much slower than previous sync version

[JulianSchuette]

Please correct me if this is due to my insufficient python3/asyncio skills, but it seems like the new python-async version is much slower than the previous synchronized one.

A quick test (values are means of some iterations, the r2 specific cmd doesn't matter):

$ python3 --version
Python 3.5.3

Synchronous version (version 2.4.0 commit 007f1d6):

start = time.perf_counter()
res = r2.cmd("pxq 8 @0x%0.16x" % location)
print (time.perf_counter() - start)

7.534199903602712e-05

Asynchronous version (version 2.8.0, commit 6f60dee):

start = time.perf_counter()
res = r2.cmd("pxq 8 @0x%0.16x" % location).result()
print (time.perf_counter() - start)

0.023162505000072997

That's a performance detoriation by roughly factor 300 per r2 command. As I see it there is currently no way to fall back to the synchronous version in 2.8.0 (apart from messing with the python version). Would it be possible to bring back the synchronous version for python3 (or enlighten me what I am doing wrong here)?