Dashboard should use log-scale and have a smaller aspect ratio

[the8472]

Currently on my desktop the dashboard charts look like this

Due to the exponential downwards trend each incremental change becomes more more difficult to distinguish. Changing the aspect ratio to make the Y-axis taller would help to some extent. But I think we should use a log-scale, for the same reasons as @scottmcm already argued in #192 (comment)

If it's easy to toggle the charting library between linear and log then adding some toggle for that would be fine too. Then people who know how to read log scales can choose that.

[Kobzol]

It's not much better if we just switch to a log-scale:

Maybe it would be better to normalize it vs the 1.28.0 baseline instead, as discussed here.

[the8472]

Well that seems to make the effective aspect ratio worse due to the y-axis offset wasting a lot of vertical space.

[nnethercote]

When looking at those graphs I always massively shrink the width of my browser window, which makes it more readable. Perhaps we could just restrict the graph width to achieve the same effect automatically?

[s7tya]

Due to #1816, the graphs now always have a smaller width. Therefore, it might be okay to close this issue.

[Kobzol]

Now with two charts per row it's indeed much better. I wonder how would it look like with the log scale now, could you please try it?

[s7tya]

Alright! Will try

[s7tya]

@Kobzol I took too much time to work on this. Here's the log scale version of the dashboard. How do you think?

[s7tya]

the screenshot of current linear scale for convenience:

[the8472]

They're wasting a lot of space which vertically compresses the chart which eats up any gains we might get from it being a log chart.

[s7tya]

Ah, I see. Then, how about this one?
I set the minimum of the chart range to the data's lowest value and use a log scale. ( or we could just remove min maybe)

[Kobzol]

Yeah, that looks much better, good idea! I'd still vote for a simple switch at the top of the page to allow selecting linear/log scale axes :)

[s7tya]

Which option should be the default: log scale or linear scale?
I've created PR that use linear scale as a default