Hi everyone,
This is the product of several years of work, with the largest part of this year being dedicated full time to it.
Initially it was part of a different project, kind of a secondary tool that I was using for my contract work, but it became so good that it simply needed to be its own thing.
Like the title implies, this tool allows you to test your page speed, and then it allows you to perform various optimizations without changing your code. You can inject HTML, JS, CSS, block requests, etc., basically everything you need to debug and optimize the loading behaviour of a page.
Give it a try, let me know what you think, and maybe mention it to someone who might need it.
Cheers,
Razvan Cojocariu