name                        old time/op    new time/op    delta
deco/unzlib/py/null-1K        2.11µs ± 1%    2.12µs ± 1%     ~     (p=0.690 n=5+5)
deco/unzlib/go/null-1K        5.87µs ± 1%    1.89µs ± 1%  -67.77%  (p=0.008 n=5+5)
deco/unzlib/py/null-4K        13.3µs ± 1%    13.5µs ± 4%     ~     (p=0.690 n=5+5)
deco/unzlib/go/null-4K        12.6µs ± 0%     8.5µs ± 0%  -32.50%  (p=0.008 n=5+5)
deco/unzlib/py/null-2M        5.17ms ±11%    5.20ms ±10%     ~     (p=1.000 n=5+5)
deco/unzlib/go/null-2M        2.61ms ± 1%    2.58ms ± 1%   -1.32%  (p=0.016 n=5+5)
deco/unzlib/py/wczdata-avg    20.9µs ±14%    24.1µs ± 1%  +15.05%  (p=0.016 n=5+4)
deco/unzlib/go/wczdata-avg    73.0µs ± 1%    68.0µs ± 1%   -6.94%  (p=0.008 n=5+5)
deco/unzlib/py/wczdata-max    23.6µs ± 0%    23.5µs ± 1%     ~     (p=0.905 n=5+4)
deco/unzlib/go/wczdata-max    72.7µs ± 0%    67.8µs ± 0%   -6.79%  (p=0.008 n=5+5)
deco/unzlib/py/prod1-avg      4.53µs ± 3%    4.47µs ± 2%     ~     (p=0.310 n=5+5)
deco/unzlib/go/prod1-avg      15.5µs ± 0%    11.0µs ± 0%  -29.11%  (p=0.008 n=5+5)
deco/unzlib/py/prod1-max       327µs ± 1%     326µs ± 0%     ~     (p=1.000 n=5+5)
deco/unzlib/go/prod1-max       545µs ± 0%     542µs ± 0%   -0.68%  (p=0.008 n=5+5)

still on wczdata and prod1 much slower compared to py/c zlib.