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time_code_execution.py
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time_code_execution.py
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# Χρονομέτρηση κώδικα με διαφορετικούς τρόπους
# Leibniz’s formula:
# pi/4 = 1 - 1/3 + 1/5 - 1/7 + 1/9 - ...
# https://proofwiki.org/wiki/Leibniz's_Formula_for_Pi
# συνάρτηση υπολογισμού του π
def pi(n):
pi = 0
s = 1
d = 1
for i in range(n):
pi += s / d
s = -s
d += 2
return pi * 4
N = 1_000_000
##########################################
# 1ος τρόπος χρονομέτρησης
import time
start = time.time()
x = pi(N)
elapsed_time = time.time() - start
print(f"time: pi={x}, time={elapsed_time}")
##########################################
# 2ος τρόπος χρονομέτρησης
import time
start = time.perf_counter()
# Return the value (in fractional seconds) of a performance counter,
# i.e. a clock with the highest available resolution to measure a
# short duration. It does include time elapsed during sleep and is system-wide.
x = pi(N)
elapsed_time = time.perf_counter() - start
print(f"time.perf_counter: pi={x}, time={elapsed_time}")
##########################################
# 3ος τρόπος χρονομέτρησης
import time
start = time.process_time()
# Return the value (in fractional seconds) of the sum of the system
# and user CPU time of the current process. It does not include
# time elapsed during sleep.
x = pi(N)
elapsed_time = time.process_time() - start
print(f"time.process_time: pi={x}, time={elapsed_time}")
##########################################
# 4ος τρόπος χρονομέτρησης
import datetime
start = datetime.datetime.now()
x = pi(N)
elapsed_time = datetime.datetime.now() - start
print(f"datetime: pi={x}, time={elapsed_time}")
##########################################
# 5ος τρόπος χρονομέτρησης
import timeit
start = timeit.default_timer()
x = pi(N)
elapsed_time = timeit.default_timer() - start
print(f"timeit: pi={x}, time={elapsed_time}")