StateBuilder::with_background_transition_merge appears to do nothing

[prestwich]

revm/crates/revm/src/db/states/state_builder.rs

Line 28 in 1ad8604

with_background_transition_merge: bool,

the option is documented as starting a thread, but it appears that never happens. am i missing something?

[rakita]

It looks like a leftover, the idea was to do some processing in the background task, but after measuring the time spent in there gains would be small.