perf: cache selected organization per request

[DonKoko]

Request-scoped caching for selected organization (AsyncLocalStorage)

What changed

• Added an AsyncLocalStorage-backed request cache and wrapped each request in it.
• getSelectedOrganisation now uses the request cache to reuse the same in-flight promise per user.
• Kept the same fallback/eviction behavior on errors.

Why

• Remix single-fetch still runs multiple loaders/actions in parallel, but each loader can receive a cloned Request, so Request-keyed caches don’t hit.
• This caused repeated userOrganization.findMany calls within the same HTTP request, which amplified Prisma connection pool pressure.
• AsyncLocalStorage provides a true request-scoped store that survives Request cloning.

Impact

• One userOrganization.findMany per request/user, even when multiple loaders fire.
• Lower peak DB connections during data-heavy pages (e.g., bookings).
• No behavior change for org selection; only dedupes work.

Notes

• Cache is scoped to a single request to avoid stale cross-request data.
• hasPermission fallback query is unchanged and remains a defensive edge case.

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1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
shelf-docs	Ignored	Preview	Jan 16, 2026 11:08am

[Copilot]

Pull request overview

This PR optimizes database query performance by caching getSelectedOrganisation results per request, reducing redundant queries when parallel loaders call requirePermission.

Changes:

• Added per-request caching using WeakMap to store organization lookup promises
• Refactored the original function into getSelectedOrganisationUncached as the implementation
• Created a new wrapper getSelectedOrganisation that implements promise-based caching

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.