> Do you think that "optimization wall" is understood by most people?
"I tried to do X but I hit a wall" (meaning, an obstacle I couldn't get around and wasn't sure it was even possible to get around) is an often used expression in American English; I think it's understandable. see e.g. [https://www.macmillandictionary.com/dictionary/british/hit-a-the-wall](https://www.macmillandictionary.com/dictionary/british/hit-a-the-wall)
