In my world, when I trade with a cartographer, my world lags, and when I press the "Save and exit" button, then my world is saved for a very long time. Prompt because of what this bug.
Environment
Graphics card: AMD Radeon HD 7620G + HD 8600M Dual, processor: AMD A10-4655M, java version: 8 update 111.
Thank you for your report!
We're actually already tracking this issue in MC-126244, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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