MacBook Pro takes 7 minutes to restart. Is it ok?

Question

I have a MacBook Pro:
  Nombre del modelo: MacBook Pro
  Identificador del modelo: MacBookPro9,2
  Nombre del procesador: Intel Core i5
  Velocidad del procesador: 2.5 GHz
  Cantidad de procesadores: 1
  Cantidad total de núcleos: 2
  Caché de nivel 2 (por núcleo): 256 KB
  Caché de nivel 3: 3 MB
  Memoria: 8 GB
  Versión de la ROM de arranque: MBP91.00D3.B09
  Versión SMC (sistema): 2.2f44
  Número de serie (sistema): XXXXXXXXXXXXXXXXXX
  UUID de hardware: DB159CB2-7F94-58EE-88AC-D57D9BA77BD4
  Sensor de movimiento repentino:
  Estado: Activado
When it becomes slow during the day, I restart it. Sometimes it takes very long just to shut down (the spinning bars keeps rotating in a black background), approximately two minutes. So, I rather simply turn it off (I click OK in the "do you really want to do it" warning), this method is faster.
Either way, my MacBook takes long to restart. It begins with a grey background for a minute or less, then a slim bar appears under Apple logo and starts to fill. This process takes three minutes, more or less. Then, when the bar is filled completely, the login screen with my photo appears. I login and immediately the pesky warning "Do you want to reopen application" appears; I click "Cancel". The desktop background picture appears, but just that, no menu bar, no dock, no icons. MacBook stays in this state for two and a half minutes. Then dock appears, no menu bar yet. I try to start an application with the Launcher icon in the dock but the screen gets blurred with the legend "Loading applications..." and MacBook stays in that state for another minute or more. I scape this blurred screen, I try to click something else but nothing is clickable, until menu bar appears. Then starts loading, clock mini icon, battery, TimeMachine, BlueTooth, iTranslate, DPS and other icons painfully slow. When everything seems to be on place, I click any item in the menu bar and the computer doesn't responde until the third click. Then everything starts working normal... until mid-afternoon, when the computer has become so slow that I have to restart it again.
As you can see, it is really frustrating, painful, unproductive.
Is this normal?
What can I do?

Answer 1

When you have the problem, note the exact time: hour, minute, second.  
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.