martmull
11b2990dd6
## Context Closes twentyhq/core-team-issues#2601 `twenty dev` crashed with a Node.js heap OOM (`FATAL ERROR: Reached heap limit — JavaScript heap out of memory`) after a while of editing. ## Root cause `loadModule()` in `manifest-extract-config-from-file.ts` compiled every manifest-defining file with **`vm.compileFunction`** on every manifest rebuild. V8 pins every function compiled through the `vm` module and never releases it ([nodejs/node#35375](https://github.com/nodejs/node/issues/35375)). In the dev loop this is on the hottest path and heavily amplified: - `runSyncPipeline` → `buildManifest` re-globs **all** `.ts/.tsx` files and recompiles every entity file on **every** sync — not just the edited one. - A single save triggers 2+ full rebuilds (the manifest watcher change → `scheduleSync`, then the esbuild watcher's `handleFileBuilt` → `scheduleSync` again). - Each compiled unit is the full esbuild bundle — hundreds of KB, up to MBs for front components (React/JSX inlined). So over an hour of editing, thousands of `vm.compileFunction` calls × large source, all permanently retained → multi-GB heap → crash. This matches the reported profile exactly. Investigation ruled out (with evidence): chokidar watchers (disposed on restart), ts-morph/`createProgram` (dead code, not in the dev loop — typecheck runs in child `tsc` processes), the event log (hard-capped at 200), Ink timers/subscriptions (all cleaned up), and graphql-sse (only used by `logs`). ## Change Keep only the **latest build per file**, keyed by file path. Each cache entry stores the file's last bundled-output hash and its compiled wrapper: - Rebuild with **unchanged** output → reuse the existing wrapper (no recompile). - Output **changed** → overwrite the entry, so the file's previous build is dropped instead of accumulating. This bounds the cache to one entry per file rather than one per rebuild, so old builds no longer pile up in the heap. The wrapper is still executed fresh into a new module shim on every call, so extraction behavior is unchanged. One file changed: `packages/twenty-sdk/src/cli/utilities/build/manifest/manifest-extract-config-from-file.ts`. ## Test - Behavior of `extractManifestFromFile` is unchanged (fresh execution per call); only redundant recompilation is eliminated and stale builds are dropped. - Note: `yarn install` could not complete in the authoring sandbox (a git-based transitive dep of `twenty-desktop` is blocked by the proxy), so lint/typecheck/tests were not run locally — relying on CI. ## Follow-ups (not in this PR) - Redundant **double-sync per save** (`start-watchers-orchestrator-step.ts`) triggers two full rebuilds per edit. - Latent **event-log display bug**: new events stop appearing once the 200-event cap is reached.
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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.
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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.
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