Zarr features supported by different implementations

Test Results Across Implementations
implementation last run language read int64 - v2 read int32 - v2 read int32 - v3 read float64 - v2 read float32 - v2 read bool - v2
Rarr 2026-08-21 R Project ok
(0.524 s)
ok
(0.520 s)
ok
(0.520 s)
ok
(0.527 s)
ok
(0.527 s)
ok
(0.525 s)
pizzarr 2026-08-20 R Project ok
(0.724 s)
ok
(0.679 s)
ok
(0.649 s)
ok
(0.682 s)
ok
(0.681 s)
ok
(0.635 s)
zaro 2026-05-29 R Project ok
(0.603 s)
ok
(0.604 s)
ok
(0.625 s)
ok
(0.607 s)
ok
(0.608 s)
ok
(0.607 s)
zarr-java 2026-07-05 Java ok
(0.573 s)
ok
(0.528 s)
ok
(0.563 s)
ok
(0.549 s)
ok
(0.539 s)
ok
(0.530 s)
zarr-python 2026-08-23 Python ok
(0.400 s)
ok
(0.248 s)
ok
(0.235 s)
ok
(0.243 s)
ok
(0.243 s)
ok
(0.237 s)
zarrs 2026-08-23 Rust ok
(0.006 s)
ok
(0.015 s)
ok
(0.006 s)
ok
(0.023 s)
ok
(0.023 s)
ok
(0.007 s)