#! /usr/bin/env python
from __future__ import print_function, division, absolute_import

import perf

from gevent import socket
from gevent.server import StreamServer


def recvall(sock, _):
    while sock.recv(4096):
        pass

N = 10

runs = []

def benchmark(conn, data):

    spent_total = 0

    for _ in range(N):
        start = perf.perf_counter()
        conn.sendall(data)
        spent = perf.perf_counter() - start
        spent_total += spent


    runs.append(spent_total)
    return spent_total

def main():
    runner = perf.Runner()
    server = StreamServer(("127.0.0.1", 0), recvall)
    server.start()

    MB = 1024 * 1024
    length = 50 * MB
    data = b"x" * length

    conn = socket.create_connection((server.server_host, server.server_port))
    runner.bench_func('sendall', benchmark, conn, data, inner_loops=N)

    conn.close()
    server.stop()

    if runs:
        total = sum(runs)
        avg = total / len(runs)
        # This is really only true if the perf_counter counts in seconds time
        print("~ %.2f MB/s" % (length * N / avg / MB))

if __name__ == "__main__":
    main()