RFR: 8358623: Avoid unnecessary data copying in ICC_Profile

[Sergey Bylokhov]

On Thu, 12 Jun 2025 05:26:54 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> [verifyHeader(byte[] data)](https://github.com/openjdk/jdk/blob/3b32f6a8ec37338764d3e6713247ff96e49bf5b3/src/java.desktop/share/classes/java/awt/color/ICC_Profile.java#L1176C2-L1184C6), expects header byte array and not the entire profile array, is it technically correct to send the entire profile byte array?

Validating the header directly without cloning is fine and actually better. The old code effectively skipped the "header.length < HEADER_SIZE" check because it always created a "new byte[HEADER_SIZE]".

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PR Review Comment: https://git.openjdk.org/jdk/pull/25650#discussion_r2143354144