Improve memory storage

[ReneWerner87]

Description

until then it was not clear for which internal memory storage is used, this i tried to describe better and optimize the code for it

the code of the storages have been updated

i also provided functionalities which create timestamps more performant when needed

Type of change

Please delete options that are not relevant.

• Code improvement

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I tried to make my code as fast as possible with as few allocations as possible
• For new code I have written benchmarks so that they can be analyzed and improved

Commit formatting:

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[ReneWerner87]

Memory storage optimized:

Benchmark_Memory/fiber_memory-12         	    7950	    153780 ns/op	     616 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    9714	    134795 ns/op	     657 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    9558	    122996 ns/op	     645 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    9392	    130914 ns/op	     635 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    8590	    123949 ns/op	     645 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    9662	    126010 ns/op	     703 B/op	       0 allocs/op

original storage:

Benchmark_Memory/fiber_memory-12         	    3972	    282395 ns/op	     662 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    4204	    279402 ns/op	     723 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    4239	    278725 ns/op	     619 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    4239	    302900 ns/op	     717 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    4288	    282079 ns/op	     703 B/op	       0 allocs/op
Benchmark_Memory/fiber_memory-12         	    4221	    280041 ns/op	     721 B/op	       0 allocs/op

[ReneWerner87]

• don´t forget to update the beta branch with the code

[efectn]

• don´t forget to update the beta branch with the code

Will merge it later