add runnable example using writes_par_shard_discard vs writes_discard

Created by  2paXZqkGuqYVrdei2n8ZVCtynbH1mwewHrmi87LA9cto  on January 19, 2022

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add sharded version of parallel writes; move writes and writes_discard to lib.rs

Created by  2paXZqkGuqYVrdei2n8ZVCtynbH1mwewHrmi87LA9cto  on January 19, 2022

J7KIVYF5AYPZVBJN4F5C6JL7JKT7P6H4KB5QEUOSNTLHGSD47PEAC

benches: add benches summary table from 4-core laptop

Created by  2paXZqkGuqYVrdei2n8ZVCtynbH1mwewHrmi87LA9cto  on January 19, 2022

BVFJCJT2D3INABYZSVLBZGQN6W7C7T6IWKJZ4B565GOFA3QQ5QKAC

add tests directory for simple test

Created by  2paXZqkGuqYVrdei2n8ZVCtynbH1mwewHrmi87LA9cto  on January 19, 2022

IMR3LWFAPRMNGQFAUAWTS4QT2L4DSNTPBJGMHKH2ZNQJB5BJJSTAC

initial record

Created by  2paXZqkGuqYVrdei2n8ZVCtynbH1mwewHrmi87LA9cto  on January 19, 2022

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(no change message)

Created by   on January 19, 2022

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