Faster loading of DLT files, applying filters and searching

Currently loading a dlt file, applying filters and searching is not very fast, especially when dlt files are getting bigger and bigger.
It must be investigated, how loading dlt file scan be speed up e.g. using Muticores.

Feedback from Linkedin.

Start by profiling DLT file loading, filter application, and searching on increasingly large DLT files to identify the main bottlenecks. Investigate whether multicore processing is appropriate, and define completion through reproducible benchmarks showing faster performance without changing results.

Written by the indexing model from the issue text.