Package check result: NOTE

Check: examples, Result: NOTE
  Examples with CPU (user + system) or elapsed time > 5s
                             user system elapsed
  extract.coef.xgb.Booster 22.963  0.034   0.857
  Examples with CPU time > 2.5 times elapsed time
                             user system elapsed  ratio
  extract.coef.xgb.Booster 22.963  0.034   0.857 26.834

No changes to worse in reverse depends.