pub struct Statistics { /* private fields */ }
Expand description

Used to collect statistics of the WasmEdge runtime, such as the count of instructions in execution.

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impl Statistics

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pub fn new() -> WasmEdgeResult<Self>

Creates a new Statistics.

Error

If fail to create a Statistics, then an error is returned.

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pub fn count(&self) -> u64

Returns the instruction count in execution.

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pub fn count_per_second(&self) -> f64

Returns the instruction count per second in execution.

Notice

For the following cases,

  • Statistics is not enabled, or
  • the total execution time is 0

The instructions per second could be NaN, which represents divided-by-zero. Use the is_nan function of F64 to check the return value before use it, for example,

use wasmedge_sdk::Statistics;

// create a Statistics instance
let stat = Statistics::new().expect("fail to create a Statistics");

// check instruction count per second
assert!(stat.count_per_second().is_nan());
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pub fn cost(&self) -> u64

Returns the total cost in execution.

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pub fn set_cost_table(&mut self, cost_table: impl AsRef<[u64]>)

Sets the cost of instructions.

Arguments
  • cost_table specifies the slice of cost table.
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pub fn set_cost_limit(&mut self, limit: u64)

Sets the cost limit in execution.

Arguments
  • limit specifies the cost limit.

Trait Implementations§

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impl Clone for Statistics

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fn clone(&self) -> Statistics

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Statistics

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V