How to calculate the time of completion of the operation. While I'm in a loop with the help of StopWatch, I measure the elapsed time and calculate the average speed of one iteration. Further, the remaining number of iterations for speed ... Something results are not OK.

- oneGive better code, and better its simplified version. "In a loop" and "one iteration rate" together look suspicious. - VladD

## 3 answers

We have **N** operations that are performed in a loop.

we know that from the 1st operation to the **Xth** operation 10 minutes passed,

it means we have the speed **V** = X operations per 10 minutes = X / 10 * 60 operations per second

those. NX operations will be performed (NX) * V seconds, the actual answer)

**PS** if using watch you go around the cycle, then the time of your viewing is added to the real action of the operation, respectively, the speed changes ...

- one"it means we have a speed of V = X operations per 10 minutes = X * 10 * 60 operations per second" Logic tells me that the speed is calculated as V = X / 10 * 60 or is I wrong? - Sergue Isupov
- oh, you're right) - IVsevolod

Windows is not a real-time operating system. Nothing prevents her from stopping the flow of your functionality for an indefinite period of time at the next moment. So display the percentage of work done.

- Special accuracy is not important to me. I export from one database to another. So it is unlikely that an error even in seconds (minutes) will worsen my result. - Sergue Isupov

I understand that you take the first iteration of the cycle and take it for the average processing time of one iteration. Such could prokanat in single-tasking OS. Here you need to calculate the average cycle time at each iteration. Post a piece of code, it will be easier to understand. You can try to figure it out using the theory of computational complexity: http://habrahabr.ru/post/104219/

- 2A great example of bullshit. Suppose you have a function that implements a certain algorithm for which its algorithmic complexity ‛O (N)‛ is strictly proved under a uniform weight criterion. Please calculate how long it will take to run this function 300 times for datasets of known dimension. - Costantino Rupert
- No, I consider the average time to complete one iteration. It seems that I got an acceptable result. Perhaps there was a rounding error in dividing. I have already tried a million options. - Sergue Isupov