* Fix and tune JMH benchmark setup * Upgrade JMH plugin to 0.7.3. Version 0.5.3 is not compatible with Gradle 8 * Enable GC profiler to track allocation rates in addition to latency * Add a benchmark for the ImmutableImage.filled method * Optimize single-color fill methods Avoid repeated calulations and allocations for the same color for ImmutableImage.fill, MutableImage.fillInPlace, and AwtImage.isFilled methods.