On Thu, 15 May 2025 11:01:36 GMT, Markus KARG <d...@openjdk.org> wrote:

>> Thanks for the examples. Imho I think that performance sensitive, 
>> specialised code can invest some lines to put together the best solution for 
>> the context whereas the majority of code can simply use a convenient 
>> `reader.readAllAsString()` instead of 
>> `reader.readAllAsCharSequence().toString()` which is borderline to parody.
>
> It is **impossible** to "invest some lines" to solve this in JAX-RS, and 
> JAX-RS as a standard technology on tens of thousands of servers. Enforcing 
> `String` prevents these useful optimizations, but brings *no actual benefit*, 
> as *only few* callers actually care for *constant* objects, but would be 
> satisfied with `CharSequence`'s lack of mutation methods.

> Also, in JAX-RS for example, you cannot make use of `transferTo` as what you 
> get is a heap object, and what you must forward also is a heap object.

What relation does such a "heap object" have to character streams?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24728#discussion_r2092023770

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