map generation speed depends on game speed

[Racusthor]

When the command is used to render a part of the map, i suppose people want this to happen as fast as possible.
However, i noticed that it goes way faster when the game speed is changed.

way to reproduce:
1. /c game.local_player.force.chart(game.player.surface,{lefttop = {x = -1024, y = -1024}, rightbottom = {x = 1024, y = 1024}})
2. open the map to see the revealing of the explored area.
3. /c game.speed = 5
4. see it go faster

[Loewchen]

I don't see how this is a bug, the generation speed should not be as fast as possible as that would use to much resources to calculate the gameplay.
NaB

[ixnorp]

This may not be a bug but it would be really handy to have listed on the wiki somewhere. I came across the force.chart() function when wanting to reveal large areas of maps for comparison but I never ran into the fact it's tied to game speed until now. This would have been really helpful as I was wondering why Factorio was plodding along taking several minutes to reveal the map area I wanted and only using 5% of my CPU.