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## Summary This is the pre-requisite for https://github.com/facebook/react/pull/29231. Current implementation of profiling hooks is only using `performance.mark` and then makes `performance.clearMarks` call right after it to free the memory. We've been relying on this assumption in the tests that every mark is cleared by the time we check something. https://github.com/facebook/react/pull/29231 adds `performance.measure` calls and the `start` mark is not cleared until the corresponding `stop` one is registered, and then they are cleared together. ## How did you test this change? To test against React from source: ``` yarn test --build --project=devtools -r=experimental --ci ``` To test against React 18: ``` ./scripts/circleci/download_devtools_regression_build.js 18.0 --replaceBuild node ./scripts/jest/jest-cli.js --build --project devtools --release-channel=experimental --reactVersion 18.0 --ci ```
This directory contains code shared between several DevTools packages:
- /packages/react-devtools-core
- /packages/react-devtools-extensions
- /packages/react-devtools-inline
It is not published or released anywhere directly.