Comment by tokai

"Results showed a small, but significant advantage in response times for words written in a sans serif font."

https://www.tandfonline.com/doi/full/10.1080/20445911.2011.5...

"Sans serif, monospaced and roman font styles significantly improved the reading performance over serif, proportional and italic fonts."

https://dl.acm.org/doi/abs/10.1145/2513383.2513447

and here a whole book about that question

https://library.oapen.org/handle/20.500.12657/53344