Walking Speed / PathCost

[nmid]

I'm trying to make the floors a bit more unique and give it more life.
I don't want to make changes to pawn walking speed...
If I want to make paved tiles (for eg) that help colonists walk faster, what setting do I change?

Edit - Ok, messing around with pathcost, I observed this:

    <PathCost>-1</PathCost>   108% walk speed
    <PathCost>-2</PathCost>   117% walk speed
    <PathCost>-3</PathCost>   127% walk speed
    <PathCost>-4</PathCost>   140% walk speed
    <PathCost>-5</PathCost>   156% walk speed

Any idea, how the calculations scale up?

[Evul]

Try use decimals and se if you get a pattern.
I don't have access to my computer so I can't look att the assembly code.
But make a path cost of 1.0 1.1 1.2 1.3 1.4 1.5 etc and se if you get any logical results

[Tynan]

Time in RW is measured in ticks. Default time to cross a tile is 14 ticks for a human. This reduces that number of ticks.

[nmid]

Is this still valid in Alpha10?
From http://rimworldwiki.com/wiki/ThingDef
pathCost    How much speed is lost when pawn works over it.    Integer

So does that means it's not tick based, but an integer (% of original speed)
or
How many integer (ticks) are lost based on original?

I'm guessing option 2.