[katzgrau]

> You get to do performance work, they feel taken care of by an expert, their visitors have a better experience, everyone wins!

Really though? It usually means:

* The fixes can require non-trivial changes that take an unknown amount of time to fix

* The client has to pay you for something that probably wasn't budgeted

* You have to fit in more work. If you're good at getting clients and you have a full schedule, it can throw a wrench in.

I'm not sure most freelance devs delight in doing suddenly imposed "performance work." Maybe the first time or two it's interesting, after that it's just annoying.