Time benchmarking of a GNU Radio flow graph

#!/usr/bin/env python

# my_benchmark.py

from gnuradio import gr

def top_block():

 fg = gr.top_block()

 src = gr.file_source(gr.sizeof_float, "input.dat")

 # your stuff here...

 dst = gr.file_sink(gr.sizeof_float, "output.dat")

 fg.connect(src, dst)

 return fg

if __name__ == '__main__':

 fg = build_graph()

 fg.run()

Then:

 $ time ./my_benchmark.py

And it will return the time time taken by your algorithm