This article has more detail, because Apple spoke with iPhone in Canada: "Apple also gave some further technical information on the situation to iPhone in Canada."
"Apple explained to iPhone in Canada it has already fixed this performance issue through a server-side update, that will now allow macOS to cache Developer ID OCSP checks for a longer period."
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[ 3.4 ms ] story [ 17.8 ms ] threadhttps://twitter.com/patrickwardle/status/1327726496203476992
I discovered this and blogged about it on Friday: https://lapcatsoftware.com/articles/ocsp.html