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Breaking change in Avro 1.12.1 affects parquet-avro users: logical types now deserialize to different Java types

Status: Open.

#3515 In apache/parquet-java;

· laymain opened on Apr 21, 2026

Optimize dictionary writers by replacing fastutil Linked maps with OpenHashMap + ArrayList

Status: Open.

#3513 In apache/parquet-java;

· iemejia opened on Apr 20, 2026

Add JMH benchmarks for encoding/decoding paths and fix parquet-benchmarks shaded jar

Status: Open.

#3511 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

Optimize BinaryPlainValuesReader by reading directly from ByteBuffer

Status: Open.

#3509 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

Reduce allocation overhead of no-op GeospatialStatistics.Builder

Type: enhancement

Status: Open.

#3507 In apache/parquet-java;

· arouel opened on Apr 19, 2026

Optimize ByteStreamSplitValuesReader page transposition

Status: Open.

#3505 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

Optimize ByteStreamSplitValuesWriter: remove per-value allocation and batch single-byte writes

Status: Open.

#3503 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

Avoid per-write virtual dispatch in DictionaryValuesWriter.shouldFallBack() by caching the size-exceeded check

Type: enhancement

Status: Open.

#3501 In apache/parquet-java;

· arouel opened on Apr 19, 2026

Cache hashCode() for non-reused Binary instances (huge dictionary-encode speedup)

Status: Open.

#3499 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

DefaultValuesWriterFactory uses thread-unsafe static singletons, causing cross-writer allocator contamination

Type: bug

Status: Open.

#3497 In apache/parquet-java;

· arouel opened on Apr 19, 2026

Optimize PlainValuesWriter by writing directly to ByteBuffer slabs (up to 2x encode speedup)

Status: Open.

#3495 In apache/parquet-java;

· iemejia opened on Apr 19, 2026

Optimize PlainValuesReader by reading directly from ByteBuffer (12x decode speedup)

Status: Open.

#3493 In apache/parquet-java;

· iemejia opened on Apr 19, 2026