fix(runtime): resolve memory leak caused by global content ref #5266
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This commit resolves a memory leak in the runtime related to a global reference that existed in the vDOM algorithm. The content ref would get set when entering the render cycle for a component, but was never cleared so the reference would exist after execution STENCIL-1072
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| Path | Error Count |
|---|---|
| src/dev-server/index.ts | 37 |
| src/mock-doc/serialize-node.ts | 36 |
| src/dev-server/server-process.ts | 32 |
| src/compiler/prerender/prerender-main.ts | 22 |
| src/testing/puppeteer/puppeteer-element.ts | 22 |
| src/runtime/client-hydrate.ts | 20 |
| src/screenshot/connector-base.ts | 19 |
| src/runtime/vdom/vdom-render.ts | 17 |
| src/compiler/config/test/validate-paths.spec.ts | 16 |
| src/dev-server/request-handler.ts | 15 |
| src/compiler/prerender/prerender-optimize.ts | 14 |
| src/compiler/sys/stencil-sys.ts | 14 |
| src/compiler/transpile/transpile-module.ts | 14 |
| src/sys/node/node-sys.ts | 14 |
| src/compiler/prerender/prerender-queue.ts | 13 |
| src/compiler/sys/in-memory-fs.ts | 13 |
| src/runtime/connected-callback.ts | 13 |
| src/runtime/set-value.ts | 13 |
| src/compiler/output-targets/output-www.ts | 12 |
| src/compiler/transformers/test/parse-vdom.spec.ts | 12 |
Our most common errors
| Typescript Error Code | Count |
|---|---|
| TS2345 | 367 |
| TS2322 | 364 |
| TS18048 | 223 |
| TS18047 | 99 |
| TS2722 | 37 |
| TS2532 | 26 |
| TS2531 | 23 |
| TS2454 | 14 |
| TS2352 | 12 |
| TS2790 | 11 |
| TS2769 | 8 |
| TS2538 | 8 |
| TS2344 | 6 |
| TS2416 | 6 |
| TS2493 | 3 |
| TS18046 | 2 |
| TS2684 | 1 |
| TS2430 | 1 |
Unused exports report
There are 14 unused exports on this PR. That's the same number of errors on main, so at least we're not creating new ones!
Unused exports
| File | Line | Identifier |
|---|---|---|
| src/runtime/bootstrap-lazy.ts | 21 | setNonce |
| src/screenshot/screenshot-fs.ts | 18 | readScreenshotData |
| src/testing/testing-utils.ts | 198 | withSilentWarn |
| src/utils/index.ts | 145 | CUSTOM |
| src/utils/index.ts | 269 | normalize |
| src/utils/index.ts | 7 | escapeRegExpSpecialCharacters |
| src/compiler/app-core/app-data.ts | 25 | BUILD |
| src/compiler/app-core/app-data.ts | 115 | Env |
| src/compiler/app-core/app-data.ts | 117 | NAMESPACE |
| src/compiler/fs-watch/fs-watch-rebuild.ts | 123 | updateCacheFromRebuild |
| src/compiler/types/validate-primary-package-output-target.ts | 61 | satisfies |
| src/compiler/types/validate-primary-package-output-target.ts | 61 | Record |
| src/testing/puppeteer/puppeteer-declarations.ts | 485 | WaitForEventOptions |
| src/compiler/sys/fetch/write-fetch-success.ts | 7 | writeFetchSuccessSync |
|
Created |
rwaskiewicz
approved these changes
Jan 17, 2024
christian-bromann
approved these changes
Jan 17, 2024
|
This patch has been released as a part of today's Stencil v4.11.0 release. |
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What is the current behavior?
There is a memory leak in the Stencil runtime related to a retained reference to a "content ref" comment. This is only an issue when the runtime patches slot behavior for use outside the Shadow DOM.
GitHub Issue Number: N/A
What is the new behavior?
This commit resolves a memory leak in the runtime related to a global reference that existed in the vDOM algorithm. The content ref would get set when entering the render cycle for a component, but was never cleared so the reference would exist after execution. So, now we clear that value at the end of the
renderVdom()function execution.Does this introduce a breaking change?
Testing
Automated testing
Automated unit & e2e tests continue to pass.
Manual testing
Other information
Also confirmed this does not cause issues with subsequent re-renders of the component