#[non_exhaustive]
pub enum WasmtimeInstantiationStrategy {
    PoolingCopyOnWrite,
    RecreateInstanceCopyOnWrite,
    Pooling,
    RecreateInstance,
    LegacyInstanceReuse,
}
Expand description

The instantiation strategy to use for the WASM executor.

All of the CoW strategies (with CopyOnWrite suffix) are only supported when either: a) we’re running on Linux, b) we’re running on an Unix-like system and we’re precompiling our module beforehand and instantiating from a file.

If the CoW variant of a strategy is unsupported the executor will fall back to the non-CoW equivalent.

Variants (Non-exhaustive)§

This enum is marked as 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.
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PoolingCopyOnWrite

Pool the instances to avoid initializing everything from scratch on each instantiation. Use copy-on-write memory when possible.

This is the fastest instantiation strategy.

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RecreateInstanceCopyOnWrite

Recreate the instance from scratch on every instantiation. Use copy-on-write memory when possible.

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Pooling

Pool the instances to avoid initializing everything from scratch on each instantiation.

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RecreateInstance

Recreate the instance from scratch on every instantiation. Very slow.

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LegacyInstanceReuse

Legacy instance reuse mechanism. DEPRECATED. Will be removed. Do not use.

Trait Implementations§

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impl Clone for InstantiationStrategy

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fn clone(&self) -> InstantiationStrategy

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 InstantiationStrategy

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

Formats the value using the given formatter. Read more
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impl Hash for InstantiationStrategy

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fn hash<__H>(&self, state: &mut __H)where __H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq<InstantiationStrategy> for InstantiationStrategy

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fn eq(&self, other: &InstantiationStrategy) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for InstantiationStrategy

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impl Eq for InstantiationStrategy

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impl StructuralEq for InstantiationStrategy

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impl StructuralPartialEq for InstantiationStrategy

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Returns the argument unchanged.

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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Get a reference to the inner from the outer.

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Get a mutable reference to the inner from the outer.

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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The resulting type after obtaining ownership.
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Creates owned data from borrowed data, usually by cloning. Read more
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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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The type returned in the event of a conversion error.
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