moka2 0.13.0

hitdns fork of A fast and concurrent cache library inspired by Java Caffeine
Documentation 
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use moka2::sync::Cache;

fn main() {
    let cache = Cache::builder()
        // A weigher closure takes &K and &V and returns a u32 representing the
        // relative size of the entry. Here, we use the byte length of the value
        // String as the size.
        .weigher(|_key, value: &String| -> u32 { value.len().try_into().unwrap_or(u32::MAX) })
        // This cache will hold up to 32MiB of values.
        .max_capacity(32 * 1024 * 1024)
        .build();
    cache.insert(0, "zero".to_string());
}