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 2026-08-10 R Project ok
(0.471 s)
ok
(0.478 s)
ok
(0.472 s)
ok
(0.472 s)
ok
(0.471 s)
ok
(0.483 s)
pizzarr 2026-08-07 R Project ok
(0.670 s)
ok
(0.659 s)
ok
(0.631 s)
ok
(0.649 s)
ok
(0.649 s)
ok
(0.625 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 2026-08-09 Python ok
(0.440 s)
ok
(0.307 s)
ok
(0.306 s)
ok
(0.308 s)
ok
(0.311 s)
ok
(0.310 s)
zarrs 2026-08-09 Rust ok
(0.010 s)
ok
(0.024 s)
ok
(0.009 s)
ok
(0.030 s)
ok
(0.031 s)
ok
(0.009 s)