I notice that you can build up some research time before picking a tech.
However, each day tick also reduces how much time penalty (50% extra cost if the tech is still 6 months away as an example).
So I was wondering is it best to stack research bonus from the electronic tree and wait until that year to start work on tech? Or just start work on it and ignore the penalty?
There are some tech that can be a "huge game-changer" like infantry equipment 2 that makes it worthwhile to ignore penalty a bit. However, there are some tech that you may want to rush but comes with a huge penalty like nuclear tech in the 1940s.
Basically what is the best way to min-max research speed?