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Fix false positive lint error with large number of branches #24287
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…trc.js to use es2020.
Comparing: af73043...8797f17 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: Expand to show
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Fascinating. |
It seems worrying that we get to such high numbers. Does this also mean we're doing a ton of work and are slow in this case? Is this case pathological in some particular way? Can we think of any way to do less work for it? |
cc @calebmer you might find this interesting |
Can you do some kind of a stress test to see how this change affects performance for the common cases? I'm not sure if there are any perf pitfalls to using BigInts. |
SetupI took the eslint-hook-bug repository and made some adjustments. I copied app/foo.tsx (the file that previously failed because the ints were too big) and copied it to fail.tsx. I then removed a couple of the conditionals from app/foo.tsx so there would be no errors when run with the current version. Finally, I copied app/foo.tsx 100 times into the app folder for the stress test. Stress TestI checked out the main branch and ran yarn build eslint-plugin-react-hooks to simulate the current environment. Eslint comes with feature that shows you how long each run takes. The command 'TIMING=1 yarn eslint app/*' will run the rule on every file in app and give us the total time eslint took to run. I ran the command 10 times and sent the output to main_runs.txt. I then ran the same command but with fail.tsx and also sent that output to main_runs.txt just so we can see the failure. I then switched over to the branch that with BigInts and reran yarn build. I then ran the same TIMING=1 yarn eslint app/* command 10 times and sent the output to big_int_runs.txt. I then ran it with fail.tsx to watch it pass this time. Concluding ThoughtsThe runtimes seemed very similar to me. If you would also like me to check the memory usage difference, let me know. That might take longer though as I'd have to do a lot of research on how to do that. |
Thanks for checking. Would you mind fixing the lint issue? I think you need to find the lint config we use for builds and add BigInt to known globals. |
Looks like your commits aren't attributed to your GH user (maybe different email). Would you like to fix them up so that you appear as a contributor after merge? I'm not sure how this works. |
You were right I had an old email in there. Don't worry about it though. |
Thanks! |
* Switched RulesOfHooks.js to use BigInt. Added test and updated .eslintrc.js to use es2020. * Added BigInt as readonly global in eslintrc.cjs.js and eslintrc.cjs2015.js * Added comment to RulesOfHooks.js that gets rid of BigInt eslint error * Got rid of changes in .eslintrc.js and yarn.lock * Move global down Co-authored-by: stephen cyron <[email protected]> Co-authored-by: dan <[email protected]>
Summary: This sync includes the following changes: - **[8dcedba15](facebook/react@8dcedba15 )**: Add fallback shim for AbortController ([#24285](facebook/react#24285)) //<Ricky>// - **[b86baa1cb](facebook/react@b86baa1cb )**: Add back lost cache test ([#24317](facebook/react#24317)) //<Ricky>// - **[bafe912a5](facebook/react@bafe912a5 )**: update types for InputContinuousLane and DefaultLane ([#24316](facebook/react#24316)) //<Leo>// - **[4ebaeae40](facebook/react@4ebaeae40 )**: moved mutation code to passive ([#24251](facebook/react#24251)) //<Luna Ruan>// - **[caa60e8fc](facebook/react@caa60e8fc )**: update types for NonIdleLanes and IdleLane ([#24313](facebook/react#24313)) //<Leo>// - **[1f7a901d7](facebook/react@1f7a901d7 )**: Fix false positive lint error with large number of branches ([#24287](facebook/react#24287)) //<Stephen Cyron>// - **[f56dfe950](facebook/react@f56dfe950 )**: Warn on setState() in useInsertionEffect() ([#24298](facebook/react#24298)) //<dan>// - **[d68b09def](facebook/react@d68b09def )**: Fix warning about setState in useEffect ([#24295](facebook/react#24295)) //<dan>// - **[057915477](facebook/react@057915477 )**: Update create-subscription README ([#24294](facebook/react#24294)) //<dan>// Changelog: [General][Changed] - React Native sync for revisions e8f4a66...8dcedba jest_e2e[run_all_tests] Reviewed By: kacieb Differential Revision: D35581147 fbshipit-source-id: 33661d77eb000fdedab7e506a458fc739eab0056
* Switched RulesOfHooks.js to use BigInt. Added test and updated .eslintrc.js to use es2020. * Added BigInt as readonly global in eslintrc.cjs.js and eslintrc.cjs2015.js * Added comment to RulesOfHooks.js that gets rid of BigInt eslint error * Got rid of changes in .eslintrc.js and yarn.lock * Move global down Co-authored-by: stephen cyron <[email protected]> Co-authored-by: dan <[email protected]>
…#24287) * Switched RulesOfHooks.js to use BigInt. Added test and updated .eslintrc.js to use es2020. * Added BigInt as readonly global in eslintrc.cjs.js and eslintrc.cjs2015.js * Added comment to RulesOfHooks.js that gets rid of BigInt eslint error * Got rid of changes in .eslintrc.js and yarn.lock * Move global down Co-authored-by: stephen cyron <[email protected]> Co-authored-by: dan <[email protected]>
Summary: This sync includes the following changes: - **[8dcedba15](facebook/react@8dcedba15 )**: Add fallback shim for AbortController ([facebook#24285](facebook/react#24285)) //<Ricky>// - **[b86baa1cb](facebook/react@b86baa1cb )**: Add back lost cache test ([facebook#24317](facebook/react#24317)) //<Ricky>// - **[bafe912a5](facebook/react@bafe912a5 )**: update types for InputContinuousLane and DefaultLane ([facebook#24316](facebook/react#24316)) //<Leo>// - **[4ebaeae40](facebook/react@4ebaeae40 )**: moved mutation code to passive ([facebook#24251](facebook/react#24251)) //<Luna Ruan>// - **[caa60e8fc](facebook/react@caa60e8fc )**: update types for NonIdleLanes and IdleLane ([facebook#24313](facebook/react#24313)) //<Leo>// - **[1f7a901d7](facebook/react@1f7a901d7 )**: Fix false positive lint error with large number of branches ([facebook#24287](facebook/react#24287)) //<Stephen Cyron>// - **[f56dfe950](facebook/react@f56dfe950 )**: Warn on setState() in useInsertionEffect() ([facebook#24298](facebook/react#24298)) //<dan>// - **[d68b09def](facebook/react@d68b09def )**: Fix warning about setState in useEffect ([facebook#24295](facebook/react#24295)) //<dan>// - **[057915477](facebook/react@057915477 )**: Update create-subscription README ([facebook#24294](facebook/react#24294)) //<dan>// Changelog: [General][Changed] - React Native sync for revisions e8f4a66...8dcedba jest_e2e[run_all_tests] Reviewed By: kacieb Differential Revision: D35581147 fbshipit-source-id: 33661d77eb000fdedab7e506a458fc739eab0056
…trc.js to use es2020.
Summary
Fixes #24279. JavaScript could not handle the large integer when there were numerous conditional statements before and after the hook. This was causing rounding errors which resulted in a conditional being evaluated incorrectly. I switched the functions to use BigInts instead and updated the eslintrc.js. If using BigInts is not acceptable, I'll be happy to try and find a different solution.
How did you test this change?
The user who created the issue linked to a repository that showed the bug. I copied that exact code and pasted into the tests file. This test now passes.
Link to repository: https://github.com/SanderRonde/eslint-hook-bug
Now when I open that file in my local instance, there is no error message for the hook.
![image](https://user-images.githubusercontent.com/63068182/162086280-bae69c58-2285-4813-a10a-9c0d03a8a770.png)
When I run all tests in ESLintRulesOfHooks-test.js, everything passes.
![image](https://user-images.githubusercontent.com/63068182/162086653-d428aec6-b953-4d7b-9020-7647259ff629.png)
Unfortunately, when I ran yarn test --prod, I got several errors that were unrelated to ESLintRulesOfHooks. I am not sure if this is normal.