KVS alternative

[watermint]

The latest Badger release is not able to compile in 32bit binary.
And Badger sometime cause an error in 32bit environment. That's probably the project is not focused on those environment.

Alternative:

• https://github.com/prologic/bitcask

[watermint]

Micro benchmark

goos: darwin
goarch: amd64
pkg: github.com/watermint/toolbox/essentials/kvs/kv_test
BenchmarkMemoryFootprintBadger
INFO	Benchmark	{"N": 1}
INFO	Benchmark	{"N": 100}
INFO	Benchmark	{"N": 10000}
INFO	Benchmark	{"N": 15366}
BenchmarkMemoryFootprintBadger-20     	   15366	   4620177 ns/op	 2889083 B/op	     948 allocs/op
BenchmarkMemoryFootprintBitcask
INFO	Benchmark	{"N": 1}
INFO	Benchmark	{"N": 100}
INFO	Benchmark	{"N": 5770}
BenchmarkMemoryFootprintBitcask-20    	    5770	  12240702 ns/op	 2234496 B/op	    1030 allocs/op
PASS

Process finished with exit code 0

Badger has better performance but Bitcask is also acceptable in performance point of view.