This is really interesting. I wonder how this might affect Chromes performance if they decide to implement such thing or just optimize the C++ code responsible for emitting sub optimal skia instructions

Last author here. We've talked to the Chrome folks and they are interested, but it's difficult work. Chrome is big enough that emitting different sequences is hard and would requiring changing a lot of internal abstractions. Skia would love to do it optimization like this but it's a small team with a lot of other priorities. Integrating outside code is hard.