perf: fast path single-token repository search

[dhimasardinata]

Repository.search() and simple root-page search commonly receive a single string token from poetry search, but both paths currently wrap it in a one-item list and run any(...) for every package name.

This keeps list-query behavior unchanged and adds a direct string path for the common case.

A small local benchmark over 10,003 package names:

old 1.351595s
new 0.141769s
speedup=9.5x

Pull Request Check List

• Added tests for changed code.
• Updated documentation for changed code. N/A, no user-facing behavior change.

Local checks:

PYTHONPATH=src uv run --with pytest --with pytest-xdist --with responses --with pytest-mock python -m pytest tests/repositories/test_repository.py tests/repositories/link_sources/test_base.py tests/repositories/test_repository_pool.py -q
uv run --with ruff python -m ruff check src/poetry/repositories/repository.py src/poetry/repositories/link_sources/base.py tests/repositories/test_repository.py
uv run --with ruff python -m ruff format --check src/poetry/repositories/repository.py src/poetry/repositories/link_sources/base.py tests/repositories/test_repository.py
PYTHONPATH=src uv run --with poetry-core --with packaging --with mypy python -m mypy src/poetry/repositories/repository.py src/poetry/repositories/link_sources/base.py
git diff --check

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

---

Sourcery is free for open source - if you like our reviews please consider sharing them ✨

• X
• Mastodon
• LinkedIn
• Facebook

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}