PHP on Windows with XAMPP running 100 times too slow

Question

PHP runs so slowly on my Windows desktop that phpMyAdmin takes minutes to open a database. Here’s a comparison of the time to run a simple PHP test program:

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Answer 1

For chrome users: I found out (after trying all hints above) that the Chrome extension "Evernote Web Clipper" is also slowing down chrome. When loading a plain URL without any includes: enabled / disabled Evernote Web Clipper: 0,7ms / 0,25ms