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to_thread is slow

Status: Open.

#4293 In zarr-developers/zarr-python;

· d-v-b opened on Aug 26, 2026

Unsigned integer index arrays are mishandled (IndexError on unsorted, and on any uint64)

bugPotential issues with the zarr-python libraryPotential issues with the zarr-python library

Status: Open.

#4285 In zarr-developers/zarr-python;

· selmanozleyen opened on Aug 25, 2026

CacheStore never initializes its LRU from an existing cache_store, so a persistent cache directory can grow by a further full max_size for every process that opens it

Status: Open.

#4282 In zarr-developers/zarr-python;

· flummoxjr opened on Aug 24, 2026

Link Checker Report

automated issue

report

Status: Open.

#4281 In zarr-developers/zarr-python;

· github-actions opened on Aug 24, 2026

Nightly Hypothesis tests failed

automated issue

Status: Open.

#4280 In zarr-developers/zarr-python;

· github-actions opened on Aug 22, 2026

A rectilinear chunk spec with a short trailing chunk is silently normalized to a regular grid, changing resize semantics

bugPotential issues with the zarr-python libraryPotential issues with the zarr-python library

Status: Open.

#4272 In zarr-developers/zarr-python;

· thomas-maschler opened on Aug 19, 2026

handle missing codecs by telling users what package to install to get the codec

Status: Open.

#4271 In zarr-developers/zarr-python;

· d-v-b opened on Aug 18, 2026

subpackage for chunk key encodings

Status: Open.

#4268 In zarr-developers/zarr-python;

· d-v-b opened on Aug 16, 2026

Release Zarr-Python v3.3.1

Status: Open.

#4256 In zarr-developers/zarr-python;

· d-v-b opened on Aug 12, 2026

avoid comparing exact output of gzip encoding in codec pipeline tests

Status: Open.

#4254 In zarr-developers/zarr-python;

· d-v-b opened on Aug 12, 2026

Link Checker Report

automated issue

report

Status: Open.

#4245 In zarr-developers/zarr-python;

· github-actions opened on Aug 10, 2026

Feature Request: Expose public synchronous encoding/decoding API in Codec / CodecPipeline

Status: Open.

#4243 In zarr-developers/zarr-python;

· ElemTran opened on Aug 7, 2026