Performance Optimizations Benches

• The error in benchmarks has been fixed.
• Benchmarks are extended to include serial access.
• The runs are repeated. Currently, the gap between split vector and standard vector seems to have diminished.
• Documentation is revised accordingly.

Performance Optimizations

Random access for Linear and Doubling split vectors are optimized.

Iterators are revisited, revised and a slight performance improvement is provided.

Exponential growth variant is removed as it adds complexity while it does not bring sufficient benefits. However, custom growth implementations are still possible.

Benchmarks are implemented.

Benchmark results are reported.