pub struct TopKBatch<T> {
updates: SmallVec<[(T, i64); 16]>,
clean: usize,
limit: i64,
}
Fields§
§updates: SmallVec<[(T, i64); 16]>
§clean: usize
§limit: i64
Implementations§
source§impl<T: Ord> TopKBatch<T>
impl<T: Ord> TopKBatch<T>
pub fn new(limit: i64) -> Self
sourcepub fn update(&mut self, item: T, value: i64)
pub fn update(&mut self, item: T, value: i64)
Adds a new update, for item
with value
.
This could be optimized to perform compaction when the number of “dirty” elements exceeds half the length of the list, which would keep the total footprint within reasonable bounds even under an arbitrary number of updates. This has a cost, and it isn’t clear whether it is worth paying without some experimentation.
sourcepub fn compact(&mut self)
pub fn compact(&mut self)
Compact the internal representation.
This method sort self.updates
and consolidates elements with equal item, discarding
any whose accumulation is zero. It is optimized to only do this if the number of dirty
elements is non-zero.
sourcefn maintain_bounds(&mut self)
fn maintain_bounds(&mut self)
Maintain the bounds of pending (non-compacted) updates versus clean (compacted) data. This function tries to minimize work by only compacting if enough work has accumulated.
Trait Implementations§
Auto Trait Implementations§
impl<T> RefUnwindSafe for TopKBatch<T>where T: RefUnwindSafe,
impl<T> Send for TopKBatch<T>where T: Send,
impl<T> Sync for TopKBatch<T>where T: Sync,
impl<T> Unpin for TopKBatch<T>where T: Unpin,
impl<T> UnwindSafe for TopKBatch<T>where T: UnwindSafe + RefUnwindSafe,
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