Struct CompressionOptions

pub struct CompressionOptions {
    pub zstd_compression_level: i32,
    pub size_estimator_fn: SizeEstimatorFn,
    pub lz_match_multiplier: f64,
    pub entropy_multiplier: f64,
}

Options to configure the behavior of compression when analysing schemas.

Fields

zstd_compression_level: i32

The zstd compression level to use. Usually ‘7’ is good enough to represent the data well at runtime, but we default to higher for accuracy when analyzing.

size_estimator_fn: SizeEstimatorFn

Function pointer to use for size estimation. The function takes SizeEstimationParameters and returns the estimated size in bytes.

lz_match_multiplier: f64

LZ Match Multiplier (user provided)

entropy_multiplier: f64

Entropy Multiplier (user provided)

Implementations

impl CompressionOptions

pub fn with_zstd_compression_level(self, level: i32) -> Self

Sets the zstd compression level. Usually ‘7’ is good enough to represent the data well at runtime, but we default to higher for accuracy when analyzing.

pub fn with_size_estimator_fn(self, estimator_fn: SizeEstimatorFn) -> Self

Sets the size estimator function. The function takes in the uncompressed data and SizeEstimationParameters and returns the estimated size of the compressed data in bytes.

Trait Implementations

impl Clone for CompressionOptions

fn clone(&self) -> CompressionOptions

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CompressionOptions

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

Formats the value using the given formatter.

impl Default for CompressionOptions

fn default() -> Self

Returns the “default value” for a type.

impl Copy for CompressionOptions