Tracking issue for benchmarking improvements.

[prady0t]

• [x] Delete asv benchmarks if any.
• [x] Make pytest-codspeed benchmarks deterministic.
• [x] Use pytest fixtures wherever possible instead of generating them inline.
• [ ] The benchmark suite needs to be reduced, perhaps by using hypothesis to sample from the overall set of benchmarks; and skipping the small datasets.
• [ ] Expand by benchmarking more functions (function's list to be added later).