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 2026-07-21 R Project ok
(0.528 s)
ok
(0.521 s)
ok
(0.519 s)
ok
(0.521 s)
ok
(0.522 s)
ok
(0.523 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 2026-07-05 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 2026-07-20 Python ok
(0.346 s)
ok
(0.311 s)
ok
(0.312 s)
ok
(0.312 s)
ok
(0.310 s)
ok
(0.304 s)
zarrs 2026-07-19 Rust ok
(0.009 s)
ok
(0.026 s)
ok
(0.008 s)
ok
(0.028 s)
ok
(0.030 s)
ok
(0.009 s)