Kunet.AsyncInterceptor

Inspired by stakx.DynamicProxy.AsyncInterceptor, but rewrite with less reflection to get better performance.

This library allows you to smoothly connect Castle.DynamicProxy with your async/await code, it provides an abstract AsyncInterceptor class, your interceptor inherited from this class can get the ability to intercept method which return value is Task, Task<T>, ValueTask or ValueTask<T>.

class Example : AsyncInterceptor
{
    // This gets called when a non-awaitable method is intercepted:
    protected override void Intercept(IInvocation invocation)
    {
        invocation.Proceed();
        invocation.ReturnValue = ... ;
    }

    // Or this gets called when an awaitable method is intercepted:
    protected override async ValueTask InterceptAsync(IAsyncInvocation invocation)
    {
        await invocation.ProceedAsync();
        invocation.AsyncResult = ... ;
    }
}

Benchmark

.NET 8.0

Method	Categories	Mean	Ratio	Gen0	Allocated	Alloc Ratio
StakxRunningTaskT	RunningTask<T>	2,076.89 ns	6.64	0.1221	2104 B	2.33
KunetRunningTaskT	RunningTask<T>	312.92 ns	1.00	0.0539	904 B	1.00
StakxRunningValueTaskT	RunningValueTask<T>	2,908.91 ns	8.54	0.1450	2440 B	2.48
KunetRunningValueTaskT	RunningValueTask<T>	340.72 ns	1.00	0.0587	984 B	1.00
StakxTask	Task	916.48 ns	31.27	0.0448	752 B	4.09
KunetTask	Task	29.31 ns	1.00	0.0110	184 B	1.00
StakxTaskT	Task<T>	1,303.35 ns	9.44	0.0648	1144 B	2.60
KunetTaskT	Task<T>	138.14 ns	1.00	0.0262	440 B	1.00
StakxValueTask	ValueTask	1,713.29 ns	45.55	0.0629	1080 B	4.35
KunetValueTask	ValueTask	37.62 ns	1.00	0.0148	248 B	1.00
StakxValueTaskT	ValueTask<T>	2,118.77 ns	14.53	0.0877	1472 B	2.92
KunetValueTaskT	ValueTask<T>	145.85 ns	1.00	0.0300	504 B	1.00
StakxVoid	Void	77.71 ns	4.14	0.0062	104 B	1.00
KunetVoid	Void	18.78 ns	1.00	0.0062	104 B	1.00

.NET Framework 4.8.1

Method	Categories	Mean	Ratio	Gen0	Allocated	Alloc Ratio
StakxRunningTaskT	RunningTask<T>	6,797.09 ns	5.59	0.5798	3684 B	2.31
KunetRunningTaskT	RunningTask<T>	1,215.56 ns	1.00	0.2537	1597 B	1.00
StakxRunningValueTaskT	RunningValueTask<T>	7,117.17 ns	5.67	0.5951	3755 B	2.24
KunetRunningValueTaskT	RunningValueTask<T>	1,254.33 ns	1.00	0.2651	1677 B	1.00
StakxTask	Task	3,158.44 ns	65.02	0.1793	1140 B	6.16
KunetTask	Task	48.58 ns	1.00	0.0293	185 B	1.00
StakxTaskT	Task<T>	4,347.93 ns	8.71	0.3281	2071 B	2.63
KunetTaskT	Task<T>	499.03 ns	1.00	0.1249	786 B	1.00
StakxValueTask	ValueTask	3,612.61 ns	67.68	0.2022	1276 B	5.12
KunetValueTask	ValueTask	53.37 ns	1.00	0.0395	249 B	1.00
StakxValueTaskT	ValueTask<T>	4,596.25 ns	8.52	0.3204	2055 B	2.67
KunetValueTaskT	ValueTask<T>	539.78 ns	1.00	0.1221	770 B	1.00
StakxVoid	Void	1,111.00 ns	32.64	0.0515	329 B	3.16
KunetVoid	Void	34.04 ns	1.00	0.0166	104 B	1.00