I tried to rerun some of the benchmarks where vscode claimed to be so bad, Couldn't reproduce it, for instance, the replace with regular expression and inserting the "'<!--'" , those were < 1s or almost instantly. I used latest version of VSCode tho.
TBH this benchmark is not fair for editors that have constant updates like VSCode and Atom, unless they keep up to date the results.
Atom has memory balloon when loading test.xml without highlighting, takes 4x as long as Code to rehighlight, simple search and replace basically doesn't terminate.
They are both terrible but at least Code doesn't seem to hit any degenerate cases.
But feature wise, it's still way ahead of Atom.