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 2026-09-16 R Project ok
(0.511 s)
ok
(0.510 s)
ok
(0.506 s)
ok
(0.496 s)
ok
(0.508 s)
ok
(0.504 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 NA 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 2026-09-13 Python ok
(0.315 s)
ok
(0.257 s)
ok
(0.258 s)
ok
(0.260 s)
ok
(0.264 s)
ok
(0.262 s)
zarrs 2026-09-20 Rust ok
(0.005 s)
ok
(0.016 s)
ok
(0.005 s)
ok
(0.021 s)
ok
(0.019 s)
ok
(0.006 s)