message: delay at least one block time to get more precise result
diff: import time
  import wallet
  import eosapi
  +import tracemalloc
  +
  +tracemalloc.start()
  producer = eosapi.Producer()
  @@ -70,12 +73,16 @@ def compare_performance():
  with producer:
  r = eosapi.set_contract('currency', '../../build/contracts/currency/currency.wast', '../../build/contracts/currency/currency.abi',0)
  assert r
  +
  + time.sleep(3.0)
  test_performance()
  info = eosapi.get_code('currency')
  with producer:
  r = eosapi.set_contract('currency','../../programs/pyeos/contracts/currency/currency.py','../../contracts/currency/currency.abi',1)
  assert r
  +
  + time.sleep(3.0)
  test_performance()
  