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 2026-10-01 R Project ok
(0.461 s)
ok
(0.453 s)
ok
(0.456 s)
ok
(0.465 s)
ok
(0.453 s)
ok
(0.453 s)
pizzarr 2026-09-24 R Project ok
(0.654 s)
ok
(0.643 s)
ok
(0.597 s)
ok
(0.627 s)
ok
(0.625 s)
ok
(0.600 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 2026-09-20 Python ok
(0.292 s)
ok
(0.247 s)
ok
(0.238 s)
ok
(0.250 s)
ok
(0.251 s)
ok
(0.244 s)
zarrs 2026-09-27 Rust ok
(0.007 s)
ok
(0.016 s)
ok
(0.007 s)
ok
(0.019 s)
ok
(0.019 s)
ok
(0.006 s)