pub struct ZstdLevel(/* private fields */);Expand description
A zstd compression level known to be inside the accepted band.
The band is 1..=22, not zstd’s full ZSTD_minCLevel()..=22. The negative
“ultra-fast” levels are real but unmeasured here, and the benchmark that
picked 12 only covers the positive range — admitting a level we have never
timed would be a knob with no evidence behind it.
Implementations§
Source§impl ZstdLevel
impl ZstdLevel
Sourcepub const PRESCRIBED: i32 = 12
pub const PRESCRIBED: i32 = 12
The measured knee (see NarCodec): 19x faster than xz -6 for four
percentage points of ratio. Not a round number chosen for looks.
Sourcepub const fn new(level: i32) -> Result<Self, LevelOutOfRange>
pub const fn new(level: i32) -> Result<Self, LevelOutOfRange>
Build a level, rejecting anything outside MIN..=MAX.
§Errors
LevelOutOfRange if level is outside the accepted band.
Trait Implementations§
impl Copy for ZstdLevel
Source§impl<'de> Deserialize<'de> for ZstdLevel
impl<'de> Deserialize<'de> for ZstdLevel
Source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
impl Eq for ZstdLevel
impl StructuralPartialEq for ZstdLevel
Auto Trait Implementations§
impl Freeze for ZstdLevel
impl RefUnwindSafe for ZstdLevel
impl Send for ZstdLevel
impl Sync for ZstdLevel
impl Unpin for ZstdLevel
impl UnsafeUnpin for ZstdLevel
impl UnwindSafe for ZstdLevel
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