GSoC 2026: Benchmarks and Performance Introduction

[Yuvraj Sharma]

Hi everyone,
I'm Yuvraj Sharma, applying for GSoC 2026 for the Benchmarks and
Performance project.
I've submitted my proposal and started contributing:
- PR #125 in sympy_benchmarks: adds series/limit benchmarks with
  cache-aware variants using clear_cache(), addressing the concern
  raised in issue #111 about ASV loop timing being misleading.
I'm also planning to submit a PR to the main sympy repo.
My proposal covers: benchmark migration from the main repo to
sympy_benchmarks, adding new benchmarks for underserved modules,
investigating CodSpeed/cachegrind for noise-free CI, and fixing
performance issues found through benchmarking.
I'd appreciate any feedback on my approach or suggestions on
priority areas for benchmarks.
Thanks,
Yuvraj