It's not entirely true though, most of the code base is still C++ and there is n...

nicoburns · on March 31, 2021

Isn't that exactly what makes it successful partial migration?

Thaxll · on March 31, 2021

You need to defind partial, because 90% of the codebase is still C++.

nicoburns · on March 31, 2021

Some thoughts:

1. Firefox is a huge codebase. 10% of that is still quite a bit.

2. Some highly complex core parts of firefox such as the rendering engine are at least partly written in Rust.

3. The bits written in Rust are not all isolated from the bits written in C++. In places they intertwine at a function level of granularity.