[Jackevansevo]

Description

package_version parsed every installed package's metadata to read one version. It now looks up only that package, as suggested in #2316, which covers all 7 places that call it.

Same scan as #6865 (fixed there for MCP only), and the same lookup as the pydantic_ai integration (direct importlib.metadata call).

#2338 chose the cached list because importlib.metadata needs Python 3.8+. That path stays as the fallback, so this only avoids the first scan's cost. ModulesIntegration still builds the full list on the first error event.

With ~250 packages, package_version("flask") goes from 106 ms to 5 ms (-95%).

Draft: the test suite hasn't been run on this yet.

Issues

• resolves: package_version() parses every installed package's metadata, slowing sentry_sdk.init() #8190

🤖 Generated with Claude Code

[sentrivana]

Hey @Jackevansevo, thanks for the PR. The change itself is good, but it's very targeted (just to Flask). Is there a way to generalize it so that any integration that needs a version check first checks via the less expensive route?

[Jackevansevo]

Hey @Jackevansevo, thanks for the PR. The change itself is good, but it's very targeted (just to Flask). Is there a way to generalize it so that any integration that needs a version check first checks via the less expensive route?

Thanks for the feedback.

I've moved the fast path check into package_version. Which should effect the following integrations:

• Flask
• Anthropic
• Ariadne
• Graphene
• Ray
• Strawberry
• MCP

If importlib.metadata fails, there's nothing found or we're on older versions of Python it will just fall back to what is was doing previously (calling _get_installed_modules()).

---

It's worth flagging here that if we skip calling _get_installed_modules() on startup this result is no longer being cached. So that (potentially) expensive check potentially gets run on first error instead of startup.

But only integrations using package_version() would have cached this anyway.

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