## Context Common API queries load selected relations after fetching the root records. Relation loading is batched: one query pipeline loads a relation for all parent records, so this is not an N+1 problem. However, every sibling relation currently starts concurrently through `Promise.all`. Nested relations repeat the same behavior recursively. A wide selection can therefore submit many independent relation query pipelines at once. Existing query complexity and record limits restrict what can be requested, but they do not limit how much database work starts concurrently. ## What this changes This PR adds a request-local FIFO concurrency limiter for nested relation loading. - At most four `findRelations` pipelines execute concurrently. - One limiter is created for the outer relation-loading call. - The same limiter is shared by every recursive level. - Queued work starts as permits become available. - Permits are released in `finally`, including when a query fails. Conceptually: ```text Before: all sibling relations -> database concurrently nested siblings -> more database work concurrently After: all sibling relations -> FIFO queue -> at most 4 database pipelines nested siblings -> same FIFO queue and same limit ``` Note: Also addressing https://github.com/twentyhq/twenty/pull/23251#discussion_r3644510597
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
Learn more about why we built Twenty
Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the User Guide for product walkthroughs, or the
Documentation for developer reference.
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Stack
TypeScript
Nx
NestJS, with BullMQ,
PostgreSQL,
Redis
React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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