Either Use Time stats are wrong or I am lazy

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Subject: Either Use Time stats are wrong or I am lazy

Question:

According to Statistics > Analysis, I used SuperMemo for just 70 minutes today. That's hard to believe considering I've had what felt like two long sessions, completed 340 repetitions, and my brain feels utterly drained. I realize I could verify the statistic's accuracy by just watching the clock (and perhaps I don't because I am, in fact, lazy), but could someone clarify what that statistic specifically represents? Is it just the total of the timer count? And why do I sense a discrepancy, even if there really isn't one?

P.S. I just spent at least 10 minutes adding new items and my Use Time went up only 1 minute, so, yeah, I definitely don't know what "Use Time" is actually referring to. If it doesn't include time creating or editing items, how do I get a measurement that is inclusive of that very significant activity?

P.S.S. I have a theory. A significant portion of my time spent with SuperMemo occurs after midnight, but because I'm a night owl, I have the "midnight shift" set to 6 hours. Is it possible that the time I've spent with SuperMemo after midnight today will appear in Analysis > Statistics under tomorrow's date? If so, then it's a bit confusing, because tomorrow's date does not appear in the Analysis charts until the midnight shift, despite the chart values corresponding to the actual time. It seems to me that values should appear in the Analysis chart as soon as they are recorded. I suppose I will see tomorrow if this theory holds up.

Hints

Answer:

You can read about details in Analysis documentation.

Use : Use time is taken from SleepChart, which records blocks of operations that included editing, viewing elements, repetitions, etc. However, if you read an article for 20 min, it may not register in that time as reading (or "watching" elements) does not record in the timeline. The start of reading (entering the element) may register as the last use block. The move to the next element will register as the next learning block. The 20 min. of reading in the meantime will be missing. You can have a look at Tools : SleepChart and look at the red learning blocks to see how many gaps of inactivity registered in your long learning session.

Midnight shift is disregarded. This means the blocks are counted from midnight to midnight.