mempool 0.3.1

A fast thread safe memory pool for reusing allocations.
Documentation
     Running target/release/mempool-2f39be8597df0623

running 14 tests
test tests::empty ... ignored
test tests::is_sync ... ignored
test tests::no_reuse ... ignored
test tests::reuse ... ignored
test bench::crossbeam_ms_get_put      ... bench:         108 ns/iter (+/- 2)
test bench::crossbeam_seg_get_put     ... bench:         113 ns/iter (+/- 41)
test bench::crossbeam_treiber_get_put ... bench:          96 ns/iter (+/- 49)
test bench::mempool_get_put_arc       ... bench:          43 ns/iter (+/- 0)
test bench::mempool_get_put_ref       ... bench:          26 ns/iter (+/- 0)
test bench::mpmc_get_put              ... bench:          30 ns/iter (+/- 0)
test bench::mutex_get_put             ... bench:          46 ns/iter (+/- 1)
test bench::mutex_lock_unlock         ... bench:          19 ns/iter (+/- 0)
test bench::refcell_get_put           ... bench:          15 ns/iter (+/- 0)
test bench::spin_lock_unlock          ... bench:           7 ns/iter (+/- 0)

test result: ok. 0 passed; 0 failed; 4 ignored; 10 measured