message: README change
diff: @@ -68,35 +68,25 @@ There is a test program [_dataframe_performance_](test/dataframe_performance.cc)
  Result:
  ```bash
  -$time python test/pandas_performance.py
  -All memory allocations are done. Calculating means ...
  --9.988731426750974e-06, 1.6486985707329185, 1.000038273533297
  -
  -real 5m51.598s
  -user 3m3.485s
  -sys 1m26.292s
  -
  -
  -$time Release/bin/dataframe_performance
  -All memory allocations are done. Calculating means ...
  -1, 1.64877, 0.999963
  -
  -real 3m34.241s
  -user 3m14.250s
  -sys 0m25.983s
  -
  -
  $ python3 test/pandas_performance.py
  Starting ... 1629817655
  All memory allocations are done. Calculating means ... 1629817883
  6.166675403767268e-05, 1.6487168460770107, 0.9999539627671375
  1629817894 ... Done
  +real 5m51.598s
  +user 3m3.485s
  +sys 1m26.292s
  +
  $ Release/bin/dataframe_performance
  Starting ... 1629818332
  All memory allocations are done. Calculating means ... 1629818535
  1, 1.64873, 1
  1629818536 ... Done
  +
  +real 3m34.241s
  +user 3m14.250s
  +sys 0m25.983s
  ```
  <B>The Interesting Part:</B><BR>
  1. Pandas script, I believe, is entirely implemented in Numpy which is in C.
  