[PR] MINOR: Optimize RemoteLogManager#buildFilteredLeaderEpochMap [kafka]

[via GitHub]

majialoong opened a new pull request, #20205:
URL: https://github.com/apache/kafka/pull/20205

   Optimize `RemoteLogManager#buildFilteredLeaderEpochMap` .
   
   Use JMH test : 
   ```
   @BenchmarkMode(Mode.AverageTime)
   @OutputTimeUnit(TimeUnit.NANOSECONDS)
   @State(Scope.Thread)
   public class LeaderEpochMapBenchmark {
   
       @Param({"1000", "10000", "100000"})
       private int mapSize;
   
       NavigableMap<Integer, Long> testMap;
   
       @Setup
       public void setup() {
           testMap = new TreeMap<>();
           for (int i = 0; i < mapSize; i++) {
               /**
                * 0,0
                * 1,0
                * 2,1
                * 3,1
                * ...
                */
               testMap.put(i, (long) (i / 2));
           }
       }
   
       @Benchmark
       public NavigableMap<Integer, Long> testOriginal() {
           // before optimize (make method public)
           return RemoteLogManager.buildFilteredLeaderEpochMap(testMap);
       }
   
       @Benchmark
       public NavigableMap<Integer, Long> testOptimized() {
           // after optimize (make method public)
           return RemoteLogManager.buildFilteredLeaderEpochMap2(testMap);
       }
   }
   ```
   
   Command :
   ``` ./jmh-benchmarks/jmh.sh LeaderEpochMapBenchmark ```
   
   Result :
   <img width="1528" height="370" alt="image" 
src="https://github.com/user-attachments/assets/9f912a40-2c88-47fc-8eea-e8f063d7c320";
 />
   
   


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