Enum Compression 

#[non_exhaustive]
pub enum Compression {
    None,
    Lz4,
    Lz4Hc(i32),
    Zstd(i32),
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

None

Disables any compression. Used by default if no compression feature is enabled.

Lz4

Available on crate feature lz4 only.

Uses LZ4 codec to (de)compress. Used by default if the lz4 feature is enabled.

Lz4Hc(i32)

👎Deprecated:

use Compression::Lz4 instead

Available on crate feature lz4 only.

Uses LZ4HC codec to compress and LZ4 to decompress. High compression levels are useful in networks with low bandwidth. Affects only INSERTs, because others are compressed by the server. Possible levels: [1, 12]. Recommended level range: [4, 9].

Deprecated: lz4_flex doesn’t support HC mode yet: lz4_flex#165.

Zstd(i32)

Available on crate feature zstd only.

Uses ZSTD codec to (de)compress. Used by default if the zstd feature is enabled and lz4 is not. The i32 parameter specifies the compression level. Use Compression::zstd() for the default level.

Note: Extremely high compression levels (e.g. above 19) are very CPU-intensive and likely unsuitable for real-time networked applications. They can also block the async executor for a significant amount of time. Prefer moderate levels for online usage.

Implementations

impl Compression

pub fn zstd() -> Self

Available on crate feature zstd only.

Creates a Zstd compression with the default level.

Trait Implementations

impl Clone for Compression

fn clone(&self) -> Compression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Compression

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

Formats the value using the given formatter.

impl Default for Compression

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Compression

fn eq(&self, other: &Compression) -> 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 Compression

impl Eq for Compression

impl StructuralPartialEq for Compression