mdfreader is very slow with large number of channels about mdfreader HOT 3 CLOSED

Thanks a lot for this proposal. I commited modifications from your pull requests.
Please have a look if expected perfomance improvement is ok for you (without yet lazy initialisation)

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This has a 100x (literally) bigger influence than the lazy initialisation idea.
Since the project I fixed the performance for is already finished, there is no further opinion on my side ;-)
I just wanted you to receive those improvement as you helped me a lot by providing your software as open source - thanks!

from mdfreader.

This was a good idea to propose to use set for improving performance, thanks.
If you are satisfied with it, I would prefer to avoid the lazy initialisation. As you mentionned, could be risky for multithreading and even without this consideration, it brought couple of issues with export functions ; for instance calling units that are not existing after closing the file, etc. I could add mechanisms that wil reopen the file but seems complicated/not robust for benefits I cannot graps for the moment.

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