The JuliaCon 2021 banner can be found here (https://juliacon.org/2021/). It says "JuliaCon 2021 (with JuMP-dev) was online and virtual 28th to 30th of July, 2021. Check out all the recorded talks on Youtube". A google search query for the phrase "Julia is the fastest high-level programming language" finds no hits.
https://www.google.com/search?q=%22Julia+is+the+fastest+high...
Please have some intellectual honesty or share some links as apparently you know where to find some things that Google does not know about.