I have written a python script to mine bitcoin.

I am however getting only 3k to 300k hashes per second

Here is the code:

import time
import hashlib
import random
import string

size_of_rand_input = int(input("Size of each random string: "))

def id_generator(chars=string.ascii_letters + string.digits):
    return ''.join(random.choice(chars) for _ in range(size_of_rand_input))

def CheckSpeed(number_of_hashes):
    t1 = time.time()
    for x in range(number_of_hashes):
        hashed = hashlib.sha256(str(id_generator()).encode("utf-8"))
    t2 = time.time()
    time_allotted= t2-t1
    returned = (time_allotted, number_of_hashes)
    return returned;

hashes = int(input("How many hashes would you like to perform: "))

x = CheckSpeed(hashes)

print("It took {} seconds to perform {} hashes!\n".format(x[0], x[1]))

You are limited by your machine clock speed and hashing library performance. Scripting langs are not a good choice for CPU intensive operations.

Also, you are doing hashes sequentially, try multiprocessing: https://docs.python.org/2/library/multiprocessing.html

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