threadteam 0.3.0

Scoped CPU thread-team placement token: a Pool and a non-Clone Exec with fork, for_ranges, external and broadcast; no Rayon type in the public API.
Documentation
team/hot                     w=2        957 ns
team/gap1ms                  w=2       5250 ns
team/gap10ms                 w=2       6042 ns
team/gap300ms                w=2      25333 ns
team/load10us-minus-10us     w=2       3032 ns
team/fork-hot                w=2       1415 ns
team/hot                     w=4        795 ns
team/gap1ms                  w=4       6875 ns
team/gap10ms                 w=4       5333 ns
team/gap300ms                w=4      36750 ns
team/load10us-minus-10us     w=4       2667 ns
team/fork-hot                w=4        907 ns
team/hot                     w=6        538 ns
team/gap1ms                  w=6       5666 ns
team/gap10ms                 w=6       9292 ns
team/gap300ms                w=6      36459 ns
team/load10us-minus-10us     w=6       1410 ns
team/fork-hot                w=6        608 ns
plain/outside-hot            w=2      10837 ns
plain/outside-gap1ms         w=2      19334 ns
plain/outside-gap10ms        w=2      29167 ns
plain/outside-load10us-minus-10us w=2      13957 ns
external/outside-hot         w=2      11485 ns
external/outside-gap1ms      w=2      13208 ns
plain/in-pool                w=2         33 ns
plain/in-pool-load10us-minus-10us w=2       6084 ns
plain/outside-hot            w=4      12899 ns
plain/outside-gap1ms         w=4      16167 ns
plain/outside-gap10ms        w=4      36000 ns
plain/outside-load10us-minus-10us w=4      18175 ns
external/outside-hot         w=4      11145 ns
external/outside-gap1ms      w=4      14209 ns
plain/in-pool                w=4        109 ns
plain/in-pool-load10us-minus-10us w=4      10886 ns
plain/outside-hot            w=6      12584 ns
plain/outside-gap1ms         w=6      24917 ns
plain/outside-gap10ms        w=6      45416 ns
plain/outside-load10us-minus-10us w=6      20614 ns
external/outside-hot         w=6      12039 ns
external/outside-gap1ms      w=6      11875 ns
plain/in-pool                w=6        205 ns
plain/in-pool-load10us-minus-10us w=6       7409 ns