RPAChallenge.com solution in attachment, using selenium and blueprism browser automation.
Selenium is doing it in 15 secs consistently, blueprism in about 25, but I've seen 20 secs once.
In general, I feel it should be about 2x slower on average without proper xpath and/or ability to narrow element search. If someone can come up with a way to make blueprism solution faster, I'd love to hear it.
This gap will grow as page gets more complex and tweaking challenge a bit would make it even harder and slower with blueprism.