Struct Optimizer 

pub struct Optimizer {
    pub speed_limit: Option<u64>,
    /* private fields */
}

Download optimizer for compression, caching, and speed limiting.

The Optimizer manages download performance features:

• Compression: Reduces storage size using configurable algorithms
• Caching: Stores files locally to avoid re-downloading
• Speed limits: Controls maximum download speed

Compression Levels

Level	Algorithm	Speed	Ratio
1-3	Gzip	Fast	Moderate
4-6	LZ4	Balanced	Good
7-9	Brotli	Slow	Best

Example

use kget::{Optimizer, Config};

// From config
let config = Config::default();
let optimizer = Optimizer::from_config(config.optimization);

// Or with defaults
let optimizer = Optimizer::new();

Fields

speed_limit: Option<u64>

Speed limit in bytes per second (None = unlimited)

Implementations

impl Optimizer

pub fn from_config(config: OptimizationConfig) -> Self

Create a new Optimizer with the provided configuration.

Arguments

• config - Optimization configuration settings

Example

use kget::{Optimizer, Config};

let config = Config::default();
let optimizer = Optimizer::from_config(config.optimization);

pub fn compress(&self, data: &[u8]) -> Result<Vec<u8>, Box<dyn Error>>

Compress data using the configured algorithm.

The algorithm is selected based on compression_level:

• Levels 1-3: Gzip (fast)
• Levels 4-6: LZ4 (balanced)
• Levels 7-9: Brotli (high compression)

Returns the original data unchanged if compression is disabled.

pub fn decompress(&self, data: &[u8]) -> Result<Vec<u8>, Box<dyn Error>>

Decompress data using the appropriate algorithm based on the file header

Supports Gzip, Brotli, and LZ4

pub fn get_cached_file( &self, url: &str, ) -> Result<Option<Vec<u8>>, Box<dyn Error>>

Retrieve a file from the cache if it exists.

Arguments

• url - The URL that was used to download the file

Returns

• Ok(Some(data)) if the file exists in cache
• Ok(None) if caching is disabled or file doesn’t exist
• Err on I/O errors

pub fn cache_file(&self, url: &str, data: &[u8]) -> Result<(), Box<dyn Error>>

Store a file in the cache

Does nothing if caching is disabled

pub fn get_peer_limit(&self) -> usize

Get the peer connection limit for torrent downloads.

Uses the speed limit as a proxy for connection capacity. Returns 50 if no speed limit is set.

pub fn is_compression_enabled(&self) -> bool

Check if compression is enabled.

pub fn new() -> Self

Create a new Optimizer with default settings.

Equivalent to Optimizer::default().

Trait Implementations

impl Clone for Optimizer

fn clone(&self) -> Optimizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Optimizer

fn default() -> Self

Create an Optimizer with sensible defaults:

• Compression enabled at level 6 (LZ4)
• Caching enabled in ~/.cache/kget
• No speed limit
• 4 max connections