Enum GpuReductionStrategy 

pub enum GpuReductionStrategy {
    Auto,
    SinglePass,
    MultiPass,
    Histogram,
}

Reduction strategy for SUM/COUNT operations

Variants

Auto

Automatically choose based on data size

SinglePass

Single-pass with atomic operations (good for small data)

MultiPass

Multi-pass reduction (good for large data, eliminates atomic contention)

Histogram

Histogram-based aggregation (best for low cardinality < 1000)

Implementations

impl GpuReductionStrategy

pub fn parse(s: &str) -> DbxResult<Self>

Parse from string (case-insensitive)

pub fn as_str(&self) -> &'static str

Get strategy name

pub fn choose_for_sum(&self, data_size: usize) -> GpuReductionStrategy

Choose optimal strategy based on data size For SUM: single-pass is generally better for current GPU architecture Multi-pass only beneficial for extremely large datasets (>100M rows)

Trait Implementations

impl Clone for GpuReductionStrategy

fn clone(&self) -> GpuReductionStrategy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GpuReductionStrategy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GpuReductionStrategy

fn default() -> GpuReductionStrategy

Returns the “default value” for a type.

impl PartialEq for GpuReductionStrategy

fn eq(&self, other: &GpuReductionStrategy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for GpuReductionStrategy

impl Eq for GpuReductionStrategy

impl StructuralPartialEq for GpuReductionStrategy