simple benchmark/test for python shelve

shelve-test.py

import shelve
import time
# initialize
with shelve.open('shelvedb') as db:
    for i in range(10000):
        db[f'{i}'] = '{i*2}'
       
# no caching
with shelve.open('shelvedb') as db:
    tic = time.time()
    for i in range(10000):
        x = db[f'{i}']
    tok = time.time()
    print(tok-tic)
    tic=tok
    for i in range(10000):
        x = db[f'{i}']
    tok = time.time()
    print(tok-tic)
    tic=tok
    
# has caching
with shelve.open('shelvedb', writeback=True) as db:
    tic = time.time()
    for i in range(10000):
        x = db[f'{i}']
    tok = time.time()
    print(tok-tic)
    tic=tok
    for i in range(10000):
        x = db[f'{i}']
    tok = time.time()
    print(tok-tic)
    tic=tok
# output:
"""
0.06999635696411133
0.06881237030029297
0.06987953186035156
0.0024607181549072266
"""