pub trait CacheWeight {
// Required method
fn cache_weight(&self) -> usize;
}Expand description
Cache weight.
Required Methods§
Sourcefn cache_weight(&self) -> usize
fn cache_weight(&self) -> usize
Cache weight as a byte count.
It is not the amount of memory used, but rather an indicator of potential storage requirements.
Its intended use is for apples-to-apples comparisons, e.g. to find out which of two items of the same type weighs more. But even then it may be misleading in some cases, e.g. if storage involves compression then the “heavier” item might end up taking less storage then the “lighter” item.
Note that sums of weights can be especially misleading in terms of memory use because there might be memory shared between items, e.g. via the use of Bytes.