Struct DataFileFieldInterner

Source

pub struct DataFileFieldInterner { /* private fields */ }

Expand description

Interns repeated data so that fragments with identical content share a single heap allocation via Arc.

At 20M fragments the deduplication typically saves multiple GB of heap because every fragment in a homogeneous table carries the same field list, and post-compaction fragments share identical version metadata bytes.

Uses a Vec-based linear scan when the cache is small (<=16 entries) and upgrades to HashMap for larger caches. In the common homogeneous case (1-3 unique values), linear scan avoids per-fragment hashing overhead.

DataFileFieldInterner

Struct DataFileFieldInterner Copy item path

Implementations§

impl DataFileFieldInterner

pub fn intern_data_file(&mut self, proto: DataFile) -> Result<DataFile>

pub fn intern_fragment(&mut self, p: DataFragment) -> Result<Fragment>

Trait Implementations§

impl Default for DataFileFieldInterner

fn default() -> DataFileFieldInterner

Auto Trait Implementations§

impl Freeze for DataFileFieldInterner

impl RefUnwindSafe for DataFileFieldInterner

impl Send for DataFileFieldInterner

impl Sync for DataFileFieldInterner

impl Unpin for DataFileFieldInterner

impl UnsafeUnpin for DataFileFieldInterner

impl UnwindSafe for DataFileFieldInterner

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> PolicyExt for Twhere T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>where T: Policy<B, E>, P: Policy<B, E>,

fn or<P, B, E>(self, other: P) -> Or<T, P>where T: Policy<B, E>, P: Policy<B, E>,

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self>

impl<T> Allocation for Twhere T: RefUnwindSafe + Send + Sync,

Struct DataFileFieldInterner

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

impl<T> PolicyExt for T
where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,