Increase Layout cache size about ratatui HOT 3 CLOSED

It would be good to add some sort of metric around the cache size and hits. Possibly just logged using the tracing library, but perhaps worth investigating https://docs.rs/metrics/0.22.0/metrics/ or https://docs.rs/metered/0.9.0/metered/

from ratatui.

For reference, on my machine, the flex example starts at about 1.4MB, a cache of 9800 fully grown makes it go to 3.5MB.

That's ~2.3 times the initial memory, but 9800 is a ridiculous value and in general 3.5MB is not that much memory.

Concerning by how much we should increase the value I'd go for 32ish. flex and constraints run about fine with 100 and there are ridiculous/overcomplicated layouts.

I want to go more in depth on this and check out some projects to see how much layout to they use.

from ratatui.

9800

that's also about how many cells I have on my terminal screen. I suspect a good ballpark figure to use is Rows + Columns, not Rows * Columns. This allows for a layout to be specified for every row and column of the screen (which is likely rare, but may become more common if we start moving to using layout for e.g. each row of a table or similar.

So that's 171+51 = 222 for my laptop so why not make this arbitrarily double that amount and a bit more (500)?

from ratatui.