Good joke. Doesn't even load for me.
Fix your browser / internet first.
And activate javascript.

He is not complaining that the site doesn't work. BUt that it load tons of trash.
0.5MB to get a bitcoin price and convert a few units? You can do that with less than 60kb.
In those 0.5MB there are many cookies spying you, ads, whatever.
You loaded faster because you already cached most of that 0.5MB. For the first access, you have to download it all.
0.5 MB later:
Preev.com is a Simple Bitcoin Converter with no links to social media, no portfolio and no alerts.
Therefore coinval.co could not be an alternative to preev.com with all these overheads.