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CPU Problem with /Startup Combined with Spell Check

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CPU Problem with /Startup Combined with Spell Check

Unread postby Leo » Wed Mar 28, 2012 5:37 am

I noticed that sometimes when Notebook loads with the /startup option the notebook.exe process is constantly using 25% CPU (on quad-core system).

After much testing I found it happens when there are at least TWO spelling mistakes on the current sub-section AND the 'Check spelling as you type' is active. One spelling mistake doesn't cause the problem, but 2 or more spelling mistakes causes the CPU problem.

This is how I confirmed the problem :

(1) Have a CPU monitor in the task bar to easily see the constant-CPU problem (I use the graph tray icon from the free 'Process Explorer' program)

(2) Make a shortcut with the /startup option

(3) Create a new blank database. Make sure the 'Check spelling as you type' option is activated.

(4) Test the '/startup' shortcut a few times - CPU usage is normal.

(5) Add some lines of text to the database, it should all be properly spelled - NO spelling mistakes.

(6) Again test the '/startup' shortcut a few times - CPU usage is normal.

(7) Change ONE of the words so there is now ONE spelling mistake.

(8) Again test the '/startup' shortcut a few times - CPU usage is normal.

(9) Change ONE MORE word so there are now TWO spelling mistakes.

(10) Again test the '/startup' shortcut a few times - now CPU is experiencing constant load.

Note that the CPU does automatically return to zero usage when Notebook is Maximized, the CPU is only under load when Notebook is first minimized from the /startup command.

(11) Remove one of the spelling mistakes, so there is again only ONE spelling mistake.

(12) Again test the '/startup' shortcut a few times - CPU usage is back to normal.

(13) Add another spelling mistake so there are again at least 2 mistakes (or more)

(14) Again test the '/startup' shortcut a few times - CPU usage has returned to constant load.

Conclusion : Spelling system causes constant load if 2 or more spelling errors exist in current sub-section AND Notebook is started minimized with /startup command AND 'Check spelling as you type' is active.
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Re: CPU Problem with /Startup Combined with Spell Check

Unread postby Marsianin » Fri Mar 30, 2012 1:57 pm

This is the confirmed spell checker engine problem but usually it consumes CPU on empty documents when autocheck is enabled. Type something and it should go back to normal.
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Re: CPU Problem with /Startup Combined with Spell Check

Unread postby Leo » Fri Mar 30, 2012 2:03 pm

Yes but here is the problem :

(1) I want to backup the Mars Notebook database every evening while I sleep.

(2) The database cannot be backed up while Notebook is running, so I have a batch file which closes Notebook and makes a backup of the database then re-opens Notebook minimized with /startup

(3) All sections of my database have 'spelling errors', actually bits of HTML code that are not in the spelling dictionary.

So unfortunately your suggestion cannot help because there will always be spelling errors in my sections, and I am not around when the program is opened using the /startup command, so every day I get up in the morning and find Notebook is consuming 25% CPU (on quad core machine). The only solution is to turn off the spelling checker, which is unfortunate since it is useful.
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Re: CPU Problem with /Startup Combined with Spell Check

Unread postby Marsianin » Fri Mar 30, 2012 2:06 pm

Actually I'm saying about an empty document. Will check some document with errors...
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