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https://issues.apache.org/jira/browse/IGNITE-20523?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Tupitsyn updated IGNITE-20523:
------------------------------------
    Description: 
IGNITE-20479 replaced custom null checks with standard 
*ArgumentNullException.ThrowIfNull*. However, *ThrowIfNull* takes *object*, 
which involves boxing for value types. Therefore we do heap allocations just to 
validate arguments in some cases, such as generic record/key/value validation 
in *KeyValueView* and *RecordView*. Bring back the custom generic validation 
method to fix this.

Also, *ToKv* method validates the wrong thing twice:
{code}
    private static KvPair<TK, TV> ToKv(KeyValuePair<TK, TV> x)
    {
        ArgumentNullException.ThrowIfNull(x);
        ArgumentNullException.ThrowIfNull(x);

        return new(x.Key, x.Value);
    }
{code}

  was:
IGNITE-20479 replaced custom null checks with standard 
*ArgumentNullException.ThrowIfNull*. However, *ThrowIfNull* takes *object*, 
which involves boxing for value types. Therefore we do heap allocations just to 
validate arguments in some cases, such as generic record/key/value validation 
in *KeyValueView* and *RecordView*. Bring back the custom generic validation 
method to fix this.

Also, *ToKv* method validates the wrong thing twice:
{code}
        ArgumentNullException.ThrowIfNull(x);
        ArgumentNullException.ThrowIfNull(x);

{code}


> .NET: Thin 3.0: ArgumentNullException.ThrowIfNull allocates on value types
> --------------------------------------------------------------------------
>
>                 Key: IGNITE-20523
>                 URL: https://issues.apache.org/jira/browse/IGNITE-20523
>             Project: Ignite
>          Issue Type: Improvement
>          Components: platforms, thin client
>    Affects Versions: 3.0.0-beta1
>            Reporter: Pavel Tupitsyn
>            Assignee: Pavel Tupitsyn
>            Priority: Minor
>              Labels: .NET, ignite-3
>             Fix For: 3.0.0-beta2
>
>
> IGNITE-20479 replaced custom null checks with standard 
> *ArgumentNullException.ThrowIfNull*. However, *ThrowIfNull* takes *object*, 
> which involves boxing for value types. Therefore we do heap allocations just 
> to validate arguments in some cases, such as generic record/key/value 
> validation in *KeyValueView* and *RecordView*. Bring back the custom generic 
> validation method to fix this.
> Also, *ToKv* method validates the wrong thing twice:
> {code}
>     private static KvPair<TK, TV> ToKv(KeyValuePair<TK, TV> x)
>     {
>         ArgumentNullException.ThrowIfNull(x);
>         ArgumentNullException.ThrowIfNull(x);
>         return new(x.Key, x.Value);
>     }
> {code}



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