RFR: 8374377: PNGImageDecoder Slow For 8-bit PNGs [v3]

[Jeremy Wood]

On Fri, 2 Jan 2026 08:13:40 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

>> Jeremy Wood has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8374377: test correctness of non-interlaced PNGs too
>>   
>>   Also this removes the performance comparison. (As of this writing there's a separate `test/micro/org/openjdk/bench/sun/awt/image/PNGImageDecoder_8bit_uninterlaced.java` file used to demonstrate that this change is more performant.)
>
> test/micro/org/openjdk/bench/sun/awt/image/PNGImageDecoder_8bit_uninterlaced.java line 23:
> 
>> 21:  * questions.
>> 22:  */
>> 23: package org.openjdk.bench.sun.misc;
> 
> package should be `org.openjdk.bench.sun.awt.image`

This is updated

> test/micro/org/openjdk/bench/sun/awt/image/PNGImageDecoder_8bit_uninterlaced.java line 33:
> 
>> 31: import org.openjdk.jmh.annotations.State;
>> 32: import org.openjdk.jmh.annotations.Warmup;
>> 33: import org.openjdk.jmh.infra.Blackhole;
> 
> We need to import `import org.openjdk.jmh.annotations.Benchmark;` and `import org.openjdk.jmh.annotations.Setup;` also. Otherwise i am seeing compilation errors.

This is updated

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PR Review Comment: https://git.openjdk.org/jdk/pull/29004#discussion_r2658709686
PR Review Comment: https://git.openjdk.org/jdk/pull/29004#discussion_r2658709693