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())

Nell’issue non sono indicati file del repository né test. Inizia riproducendo la query Java between indicizzata con 100.000 righe e scritture concorrenti su Android, quindi determina se la query utilizza i dati dell’indice; il lavoro è completato quando sono state stabilite la causa e una misurazione confrontata con l’aspettativa riportata di meno di 100 ms.