A demo implementation of write ahead log.
A more elaborate explanable in https://eileen-code4fun.medium.com/building-an-append-only-log-from-scratch-e8712b49c924.
Benchmark test for sync vs async:
| Test | Iterations | Cost |
|---|---|---|
| BenchmarkSyncWAL-8 | 1000000000 | 0.363 ns/op |
| BenchmarkAsyncWAL-8 | 1000000000 | 0.000796 ns/op |