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  1. from timeit import Timer
  2. setup = 'my_list = [[1]*100]*10000'
  3.  
  4. #[sum(x) for x in my_list]
  5. print Timer('sum(sum(x) for x in my_list)', setup = setup).timeit(100)
  6.  
Success #stdin #stdout 2.31s 6740KB
stdin
Standard input is empty
stdout
2.28195810318