fn find_evict_candidates<E: EvictCandidate>(
    cache: &Cache,
    batch: usize,
) -> Result<(u64, Vec<E>), ForcepError> {
    let mut total_sz = 0;
    let mut entries = Vec::with_capacity(batch);

    for result in cache.metadata_iter() {
        // if any weird errors happen with the iter, then we should treat them as fatal and just
        // push them up the stack
        let (key, meta) = result?;

        // increment the total size counter
        total_sz += meta.get_size();

        // if the `entries` vector isn't filled, just insert the entry
        let entry = E::from_meta(key, meta);
        if entries.len() < batch {
            entries.push(entry);
            continue;
        }

        // `entries` vector is completely filled, so swap the values if this current metadata entry
        // should be evicted sooner than the one stored
        //
        // this slowly weeds out all entries of metadata until there are only the ones left that
        // should be evicted first
        if let Some((index, _)) = entries
            .iter()
            .enumerate()
            .find(|(_, e)| entry.should_evict_over(e) == cmp::Ordering::Greater)
        {
            entries[index] = entry;
        }
    }

    // sort the entries so they're in order by how they should be evicted
    entries.sort_unstable_by(|a, b| b.should_evict_over(a));
    Ok((total_sz, entries))
}
/// Finds the total size of the cache and a vector of eviction candidates.
///
/// The eviction candidates is an in-order list of candidates that should be removed from the
/// cache. These are selected based on the priority to evict, which is determined by
/// [`EvictCandidate::should_evict_over`].
///
/// This function runs at approx. `O(n * batch)` where `n` is the number of metadata entries, and
/// `batch` is the variable provided.
Finds the total size of the cache and a vector of eviction candidates.
The eviction candidates is an in-order list of candidates that should be removed from the
cache. These are selected based on the priority to evict, which is determined by
[`EvictCandidate::should_evict_over`].

This function runs at approx.
Finds the total size of the cache and a vector of eviction candidates . The eviction candidates is an in - order list of candidates that should be removed from the cache . These are selected based on the priority to evict which is determined by [ ` EvictCandidate :: should_evict_over ` ] . This function runs at approx .
fn find_evict_candidates<E: EvictCandidate>(
    cache: &Cache,
    batch: usize,
) -> Result<(u64, Vec<E>), ForcepError> {
    let mut total_sz = 0;
    let mut entries = Vec::with_capacity(batch);
    for result in cache.metadata_iter() {
        // if any weird errors happen with the iter, then we should treat them as fatal and just
        // push them up the stack
        let (key, meta) = result?;
        // increment the total size counter
        total_sz += meta.get_size();
        // if the `entries` vector isn't filled, just insert the entry
        let entry = E::from_meta(key, meta);
        if entries.len() < batch {
            entries.push(entry);
            continue;
        }
        // `entries` vector is completely filled, so swap the values if this current metadata entry
        // should be evicted sooner than the one stored
        //
        // this slowly weeds out all entries of metadata until there are only the ones left that
        // should be evicted first
        if let Some((index, _)) = entries
            .iter()
            .enumerate()
            .find(|(_, e)| entry.should_evict_over(e) == cmp::Ordering::Greater)
        {
            entries[index] = entry;
        }
    }
    // sort the entries so they're in order by how they should be evicted
    entries.sort_unstable_by(|a, b| b.should_evict_over(a));
    Ok((total_sz, entries))
}
fn find_evict_candidates < E : EvictCandidate > ( cache : & Cache , batch : usize , ) -> Result < ( u64 , Vec < E > ) , ForcepError > { let mut total_sz = 0 ; let mut entries = Vec :: with_capacity ( batch ) ; for result in cache . metadata_iter ( ) { // if any weird errors happen with the iter, then we should treat them as fatal and just // push them up the stack let ( key , meta ) = result ? ; // increment the total size counter total_sz += meta . get_size ( ) ; // if the `entries` vector isn't filled, just insert the entry let entry = E :: from_meta ( key , meta ) ; if entries . len ( ) < batch { entries . push ( entry ) ; continue ; } // `entries` vector is completely filled, so swap the values if this current metadata entry // should be evicted sooner than the one stored // // this slowly weeds out all entries of metadata until there are only the ones left that // should be evicted first if let Some ( ( index , _ ) ) = entries . iter ( ) . enumerate ( ) . find ( | ( _ , e ) | entry . should_evict_over ( e ) == cmp :: Ordering :: Greater ) { entries [ index ] = entry ; } } // sort the entries so they're in order by how they should be evicted entries . sort_unstable_by ( | a , b | b . should_evict_over ( a ) ) ; Ok ( ( total_sz , entries ) ) }
Finds the total size of the cache and a vector of eviction candidates.
Finds the total size of the cache and a vector of eviction candidates .
cache
&Cache
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usize
cache
&Cache
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