ycz

fixBug:BenchmarkMultiInsertDifferent_256_Shard

1

runWithShards parameter error, 'benchmarkMultiGetSetDifferent' should be adjusted to 'benchmarkMultiInsertDifferent' fix：https://github.com/orcaman/concurrent-map/issues/140

runWithShards parameter error, 'benchmarkMultiGetSetDifferent' should be adjusted to 'benchmarkMultiInsertDifferent'

Optimizing graceClose function

1

although the **close** signal channel is handled by changing the **state**, it still needs to be elegantly closed syntactically.