Remove all of the taxi depots from your cities.

[icedude94]

For all you folks having issues with simulation speed slowing down, try removing all of your taxi depots.

Pathfinding is always the biggest cause of simulation slow down in these types of games. After checking the pathfinding screen in the devtools, I noticed that the taxi dispatch system was always in the top 5 producing pathfinding queries.

I deleted the 3 taxi stations I had in a city of 360k and my average simulation speed went from 74% to 94% and the average number of pending queries dropped from 250 to 20.

Taxis from outside the city will still spawn so to reduce those, have mass transit connections to the outside like buses and trains and consider building a park and ride close to where you see the connection with the most taxis coming in.

It seems the game's simulation speed directly correlates to the number of pending pathfinding queries.

I tried adding in a bunch of taxi stations later with the dispatcher upgrade and my simulation speed went down to 50% average.

[icedude94]

Also if you are experiencing a lot of hitching or stuttering with your frame rate, go to the graphics options in game and set frame rate latency to 3, the highest level. It smoothed it out a lot for me and removed most of the stuttering.

[icedude94]

Without taxi depots: 95% simulation speed.

https://steamcommunity.com/sharedfiles/filedetails/?id=3218786229

Taxi AI Dispatch system is #15 in top processes for pathfinding queries.

https://steamcommunity.com/sharedfiles/filedetails/?id=3218787296

[icedude94]

Added in one taxi depot with 55 taxi capacity. With only 25 of the 55 taxi's spawned:

https://steamcommunity.com/sharedfiles/filedetails/?id=3218789214
Pathfinding queries for taxiAIdispatch skyrockets. Pending pathfinding queries skyrockets.

https://steamcommunity.com/sharedfiles/filedetails/?id=3218789255

Simulation speed drops to 26%.

[icedude94]

About 10 minutes after the 55th cab enters service, the TaxiAIDispatch has caught up to and surpassed the resident AI pathfinder and is up to the #5 position in the list of pathfinding processes.

The 55 taxis have generated more pathfinding queries than all of the residents in the entire city.

https://steamcommunity.com/sharedfiles/filedetails/?id=3218795745

[General Tso]

Excellent work!

[icedude94]

Just to put this into perspective, the taxi dispatch system with only 55 vehicles + the ones from outside the city, is throwing more queries at the pathfinding AI than the garbage truck, post van, and road maintenance systems combined.

[Lord of RROD]

Good find. I know it's pathfinding issue. But didn't know impact of taxis. That's why my city came to a halt. I filled it with taxis.

[General Tso]

Originally posted by icedude94:

Just to put this into perspective, the taxi dispatch system with only 55 vehicles + the ones from outside the city, is throwing more queries at the pathfinding AI than the garbage truck, post van, and road maintenance systems combined.

Would you say it's "taxing" the system. ;)

[Moderate Misery]

Great tip OP. This is why mods like "No Dogs" exist. Modders can't fix poorly optimized code so they have to just remove things. Although it seems CO can't fix it either as they just cap how many cims leave they're house and straight up lowering the overall pop caps to compensate.

[Major Kudos™]

Yup, just another transit system that gobbles agents.
If you want to build a high pop city The most efficient one to use is underground Metro.
Taxis have always been a drag on population and traffic.

[sunrisered]

good work finding this and hope the game devs look into this path finding shenanigans

[Nebster]

Interesting. I will check this out. Thanks for analysis.

[V_Cred]

That's very helpful! Sad to realize that we can't use or "play" with some features just because it messes too much with game performance.

[icedude94]

I'm not a coder so I don't now how easy it will be to do this, but similar to how they blocked cims from shopping at industrial zones and offices, there should be a setting that if all the city taxis are in use, then it should just auto block all pathfinding queries to the taxi AI dispatch.

[tomoudt]

I appreciate your post sooo much. Cuz I tested it out after reading your post and it worked😍😍