DataSourcesSnapshotBenchmark to measure iterateAllUsedSegmentsInSnapshot perf

[himanshug]

wrote to get some numbers for the discussion in #10287

On my laptop (I know its not perfect, but gives an idea for the discussion above)..

Benchmark                                                                   (numDataSources)  (numSegmentPerDataSource)  Mode  Cnt         Score        Error  Units
DataSourcesSnapshotBenchmark.iterateUsing_forloops                                       500                       1000    ss   50   4232403.460 ± 219765.673  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_forloops                                       500                       2000    ss   50   8659380.560 ± 185390.719  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_forloops                                      1000                       1000    ss   50   9013917.980 ± 188947.989  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_forloops                                      1000                       2000    ss   50  17031865.840 ± 211728.709  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_iterateAllUsedSegmentsInSnapshot               500                       1000    ss   50  12191110.300 ± 112767.069  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_iterateAllUsedSegmentsInSnapshot               500                       2000    ss   50  25415400.500 ±  94122.833  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_iterateAllUsedSegmentsInSnapshot              1000                       1000    ss   50  24639497.460 ± 142729.255  ns/op
DataSourcesSnapshotBenchmark.iterateUsing_iterateAllUsedSegmentsInSnapshot              1000                       2000    ss   50  53371752.960 ± 395712.839  ns/op

[nishantmonu51]

👍