[.Net] ExecuteScriptAsync / PostWebMessageAsJson / PostWebMessageAsString with buffer - not string

Is your feature request related to a problem? Please describe.

With a certain frequency (~ 2 seconds), we need to execute some rather large scripts in WebView2. Because ExecuteScriptAsync only takes a string as a parameter, and the string in .Net is an immutable type, then we can't use a buffer for this. As a result every time we need to create a new one, and most of the time the garbage collector collects these strings, which naturally leads to lags (not visual of course, but significant for us) :(

Describe the solution you'd like and alternatives you've considered.

Create an overload of ExecuteScriptAsync / PostWebMessageAsJson / PostWebMessageAsString that will take some buffer as input parameter (ReadOnlyMemory<char> / char[]). For example:

public System.Threading.Tasks.Task<string> ExecuteScriptAsync (ReadOnlyMemory<char> script);

May be some other workaround exists that I missed?

AB#38225871

Start by reviewing the requested overloads for ExecuteScriptAsync, PostWebMessageAsJson, and PostWebMessageAsString, along with the proposed ReadOnlyMemory or char[] inputs. Then locate the corresponding .NET WebView2 API definitions and assess the buffer-lifetime and interop requirements. Done means the API change is specified and implemented consistently for all three methods, with validation for large, recurring calls.