In case you're wondering how editing the economy data file eliminates the stutters, here's some technical explanation: The reason the stutters occur is because the is rapidly generating jobs for every company in every city, with no upper limit. What this mod does is reduce the frequency at which these jobs are generated, so the game will have to waste less memory on this. Also, another change is that Freight Market jobs have a 99% chance to not be generated each cycle, which shouldn't be affecting people who only use owned trailers/Cargo Market. For the previous reason, if you want to use the Freight Market, it's advised to deactivate the mod (since this fix is only needed for when you use owned trailers, the stutters don't happen on company trailers).