CompiledModelPolicy enum

Ordered accelerator policy for building a CompiledModel.

This is deliberately separate from Accelerator. An accelerator is a hardware target, while a policy describes preference and fallback order; an unordered Set<Accelerator> cannot distinguish an automatic choice from an exact request.

Inheritance
Available extensions

Values

auto → const CompiledModelPolicy

Package-recommended selection.

In flutter_litert 3.9 this means a strict GPU request at Precision.fp32, with a complete CPU-only retry when GPU construction fails. It does not first request a mixed {gpu, cpu} graph. NPU is intentionally excluded because availability and correctness remain device- and model-specific.

Auto is a construction policy, not a correctness test or benchmark. A model that compiles can still be numerically unsuitable for a backend; validate production models separately with verifyCompiledModel.

cpu → const CompiledModelPolicy

CPU only.

gpu → const CompiledModelPolicy

GPU compilation with no complete CPU retry.

"Strict" here describes the requested accelerator set and fallback policy. Use CompiledModel.isFullyAccelerated to inspect whether the runtime placed the whole graph on an accelerator.

gpuWithCpuFallback → const CompiledModelPolicy

Request a mixed {gpu, cpu} graph, then retry the whole model CPU-only if construction fails.

npu → const CompiledModelPolicy

NPU compilation with no complete CPU retry.

npuWithCpuFallback → const CompiledModelPolicy

Request a mixed {npu, cpu} graph, then retry the whole model CPU-only if construction fails.

NPU is experimental and must be validated per model and target device.

Properties

hashCode → int
The hash code for this object.
no setterinherited
index → int
A numeric identifier for the enumerated value.
no setterinherited
name → String

Available on Enum, provided by the EnumName extension

The name of the enum value.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

values → const List<CompiledModelPolicy>
A constant List of the values in this enum, in order of their declaration.