Re: RFR: 8300236: Use VarHandle access in Data(Input | Output)Stream classes

[Per Minborg]

On Wed, 18 Jan 2023 16:34:57 GMT, Per Minborg <pminb...@openjdk.org> wrote:

> This PR proposes using a performance optimization using a new supported API 
> for operations similar to those found in `java.io.Bits`

Performance looks promising for serialization (values in us/operation):

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  | Java 20 | Java 21 | Improvement
-- | -- | -- | --
SerializeBenchmark.serializeData | 7.283 | 6.793 | 6.7%
SerializeBenchmark.serializeRecord | 7.275 | 6.733 | 7.5%

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![image](https://user-images.githubusercontent.com/7457876/213516307-c39c0467-8cd0-4fd8-9d4b-f56b17e1a4ca.png)

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PR: https://git.openjdk.org/jdk/pull/12076