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 2026-06-11 R Project ok
(0.449 s)
ok
(0.443 s)
ok
(0.444 s)
ok
(0.448 s)
ok
(0.457 s)
ok
(0.454 s)
pizzarr 2026-05-16 R Project ok
(0.680 s)
ok
(0.671 s)
ok
(0.626 s)
ok
(0.649 s)
ok
(0.659 s)
ok
(0.615 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 2026-06-07 Java ok
(0.688 s)
ok
(0.548 s)
ok
(0.587 s)
ok
(0.586 s)
ok
(0.547 s)
ok
(0.548 s)
zarr-python 2026-04-19 Python ok
(0.320 s)
ok
(0.290 s)
ok
(0.287 s)
ok
(0.294 s)
ok
(0.292 s)
ok
(0.290 s)
zarrs 2026-06-07 Rust ok
(0.009 s)
ok
(0.022 s)
ok
(0.009 s)
ok
(0.030 s)
ok
(0.027 s)
ok
(0.008 s)