On Thu, 1 Dec 2022 04:10:32 GMT, Anthony Scarpino <[email protected]> wrote:
>> src/java.base/share/classes/com/sun/crypto/provider/GaloisCounterMode.java
>> line 778:
>>
>>> 776: gctr, ghash);
>>> 777: } else {
>>> 778: int ofs = src.arrayOffset() + src.position();
>>
>> Isn't this also used on line 774? Why not move this up and directly refer to
>> it for both places?
>
> The line 774 case only uses the calculated value once. I'm avoiding the
> unnecessary store & load operations when it is set the value to a variable. I
> see it when I run javap -c to view the bytecode. It's purely an
> optimization for performance. I do set it to the variable in the line 778
> case because calculating the value twice is probably more expensive than once
> with the store & load operations.
I see.
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PR: https://git.openjdk.org/jdk/pull/11121
