This thread is resolved. Here is a description of the problem and solution.
Problem: What can I do to optimize WPML performance and increase website speed?
Solution: WPML 4.3 version solved the performance issues that some sites experienced. Updating to the latest version of WPML and its add-ons should resolve the problem.
If you are still running into performance problems, first follow our FAQ entry about preventing performance issues with WPML. This FAQ includes a number of simple steps to follow.
In case you want to profile your site's performance and get to the bottom of performance problems, follow the guide for debugging performance problems.
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