RFR: 8378698: Optimize Base64.Encoder#encodeToString

[Patrick Strawderman]

On Wed, 25 Feb 2026 15:58:22 GMT, Chen Liang <liach at openjdk.org> wrote:

> Hmm, I checked the code of that deprecated constructor. If the compiler can recognize `count == ascii.length` then it should be able to fold this code; maybe the compiler is too stupid. Have you verified the performance results in a benchmark?

I did not run benchmarks, just saw that the constructor copies the array (obviously since it's public), and that we use JLA in other places to avoid the copy.

> Turns out this is necessary per https://bugs.openjdk.org/browse/JDK-8364418

Yep I saw that as well, which is why I thought this would be beneficial.

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PR Comment: https://git.openjdk.org/jdk/pull/29920#issuecomment-3961737142