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.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.