I've conducted a few tests, the results with screenshots with ajax response measurements:
1. Phrase “test y”, results 1.90, 1.36, 1.69 seconds: https://i.imgur.com/DZZDOk8.png
2. Phrase “test a”, results 1.56, 1.77, 1.50 seconds: https://i.imgur.com/m6mOvD9.png
3. Hardest test – 6 different standalone characters, 6 build up like queries – Phrase “λ β ο x y a”, results 1.56, 1.69, 1.44 seconds: https://i.imgur.com/pvv4i0b.png
For me each test wen under 2 seconds, on worst case scenario it should be below 4 I would say.
Please do not upgrade the plugin until the upcoming version is out, I've added a few performance related lines that are not present in the current version yet.Best,
If you like my products, don't forget to rate them on codecanyon :)