Comparison of looking up Python class in dict

gistfile1.txt

from pyprofiling import Profiled                                                 
                                                                                 
import logging                                                                   
import random                                                                    
import threading                                                                                                     
                                                                                 
                                                                                 
A_HASH_INDEX = 1                                                                 
                                                                                 
class A(object):                                                                 
  pass                                                                           
                                                                                 
                                                                                 
logging.basicConfig(                                                             
    format='%(levelname)s %(asctime)s %(filename)s:%(lineno)s: %(message)s',     
    level=logging.INFO)                                                          
                                                                                 
                                                                                 
cache = {}                                                                       
cache[A_HASH_INDEX] = A                                                          
cache[hash(A)] = A                                                               
cache[A.__name__] = A                                                            
                                                                                 
                                                                                 
with Profiled('Look up 5k times'):                                               
  for _ in xrange(5000):                                                         
    with Profiled('Look up by static ID'):                                       
      v = cache[A_HASH_INDEX]                                                    
    with Profiled('Look up by hash()'):                                          
      v = cache[hash(A)]                                                         
    with Profiled('Look up by __name__'):                                        
      v = cache[A.__name__]

"""
mwf@mwf02:/tmp/compare$ python compare.py 
INFO 2017-08-15 15:48:19,578 __init__.py:53: 
Look up 5k times 1 * 0.071s = 0.071s
  Look up by static ID 5000 * 0.000s = 0.004s (max 0.00s)
  Look up by hash() 5000 * 0.000s = 0.005s
  Look up by __name__ 5000 * 0.000s = 0.005s (max 0.00s)
  remainder 0.06s
mwf@mwf02:/tmp/compare$ python compare.py 
INFO 2017-08-15 15:48:20,501 __init__.py:53: 
Look up 5k times 1 * 0.053s = 0.053s
  Look up by static ID 5000 * 0.000s = 0.003s
  Look up by hash() 5000 * 0.000s = 0.004s (max 0.00s)
  Look up by __name__ 5000 * 0.000s = 0.004s (max 0.00s)
  remainder 0.04s
mwf@mwf02:/tmp/compare$ python compare.py 
INFO 2017-08-15 15:48:21,875 __init__.py:53: 
Look up 5k times 1 * 0.050s = 0.050s
  Look up by static ID 5000 * 0.000s = 0.003s
  Look up by hash() 5000 * 0.000s = 0.004s
  Look up by __name__ 5000 * 0.000s = 0.003s
  remainder 0.04s
"""