Make "between" query conditions use index data

Build info

• ObjectBox version: 3.5.0
• OS: Android 14
• Device/ABI/architecture: Pixel 8 Pro

Steps to reproduce

I have a database that contains say 100,000 rows. I try to query 20,000 rows using an id + a between query on an indexed long. It takes ~1.5 seconds in average, sometime up to 5-10s.

Data is frequently written to the database, about 40 times per second. Is that an issue? About 2400 rows are added per second in total between these writes.

The relativeSamplingTimestamp that is used as index has 2 values for the same timestamp in all cases (2 different data streams with same time). Like:

1
1
2
2
3
3
...

Expected behavior

I would expect it to be under a 100ms?

Actual behavior

Takes 1-10 seconds. Average 1.5s.

Code

Schema:

  @Id
  public long id
  public ToOne<LocalSession> localSession;
  @Convert(converter = Converters.SerializableConverter.class, dbType = byte[].class)
  private HashMap<Integer, Float> samples;
  @Convert(converter = Converters.InstantConverter.class, dbType = Long.class)
  private Instant receptionTimestamp;
  @Nullable
  @Index
  private Integer relativeSamplingTimestamp;
  @Convert(converter = Converters.InstantConverter.class, dbType = Long.class)
  @Index
  @Nullable
  private Instant absoluteSamplingTimestamp;

Query:
    samplesRelativeTimestampBetweenQuery = sampleBox.query().equal(Sample_.localSessionId, 0)
        .between(Sample_.relativeSamplingTimestamp, 0, 0).build();

Which i then call with parameters like:

samplesRelativeTimestampBetweenQuery.setParameter(
            Sample_.localSessionId, localSessionId)
            .setParameters(Sample_.relativeSamplingTimestamp, startTimestamp, endTimestamp)
            .find())

El issue no menciona archivos del repositorio ni pruebas. Empieza por reproducir la consulta between de Java indexada con 100.000 filas y escrituras concurrentes en Android; después determina si la consulta utiliza datos del índice. Se considera terminado cuando se hayan establecido la causa y un resultado medido frente a la expectativa reportada de menos de 100 ms.