On Fri, 22 Sep 2023 08:53:07 GMT, Claes Redestad <[email protected]> wrote:

>> `URLEncoder` currently appends chars that needs encoding into a 
>> `java.io.CharArrayWriter`, converts that to a `String`, uses 
>> `String::getBytes` to get the encoded bytes and then appends these bytes in 
>> a escaped manner to the output stream. This is somewhat inefficient.
>> 
>> This PR replaces the `CharArrayWriter` with a reusable `CharBuffer` + 
>> `ByteBuffer` pair. This allows us to encode to the output `StringBuilder` in 
>> small chunks, with greatly reduced allocation as a result.
>> 
>> The exact size of the buffers is an open question, but generally it seems 
>> that a tiny buffer wins by virtue of allocating less, and that the per chunk 
>> overheads are relatively small.
>
> Claes Redestad has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   Update src/java.base/share/classes/java/net/URLEncoder.java
>   
>   Co-authored-by: ExE Boss <[email protected]>

How would this be an improvement?

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PR Comment: https://git.openjdk.org/jdk/pull/15865#issuecomment-1748302930

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