store: add benchmarks

Benchmarks that measure read/write operations timing.
Can be run by command:
'v23 go test v.io/syncbase/x/ref/services/syncbase/store/... -bench .'

As a point of reference results on my HP Z420:

BenchmarkWriteSeq-10	  200000	      8809 ns/op
BenchmarkWriteRandom-10	  200000	      9406 ns/op
BenchmarkOverwrite-10	  200000	      9175 ns/op
BenchmarkReadSequential-10	 2000000	       627 ns/op
BenchmarkReadRandom-10	 1000000	      7805 ns/op

Change-Id: I2d4cab814d71f46f7baa92d8be2d3ec224f792c8
2 files changed
tree: 911ab758c50365b69eca0234305682a0005bc30a
  1. v23/
  2. x/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTORS
  6. LICENSE
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  8. VERSION