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Update link ref handling to clean up previous listeners #7943

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merged 4 commits into from Jul 14, 2019
Merged

Update link ref handling to clean up previous listeners #7943

merged 4 commits into from Jul 14, 2019

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ijjk
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@ijjk ijjk commented Jul 12, 2019

This makes sure the previous listeners are cleaned up before overwriting the cleanup function.

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Stats from current PR

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zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
Build Duration 14.2s 13.8s -382ms
node_modules Size 45.4 MB 45.4 MB -93 B
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Click to expand serverless stats
zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
Build Duration 14.5s 14.9s ⚠️ +384ms
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Stats from current PR

Click to expand stats
zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
Build Duration 12.7s 12.4s -255ms
node_modules Size 45.4 MB 45.4 MB -93 B
Total Bundle (main, webpack, commons) Size 210 kB 210 kB ✓
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Client pages/routerDirect gzip Size 306 B 306 B ✓
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Client pages/withRouter gzip Size 301 B 301 B ✓
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Click to expand serverless stats
zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
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@brad-decker
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@ijjk if you’d like me to test this out on the prod site I reported the issue on in the react thread I can.

@timneutkens
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@brad-decker that'd be great!

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Stats from current PR

Click to expand stats
zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
Build Duration 14.5s 14.2s -328ms
node_modules Size 45.4 MB 45.4 MB -93 B
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Client pages/routerDirect gzip Size 306 B 306 B ✓
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Client pages/withRouter gzip Size 301 B 301 B ✓
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Click to expand serverless stats
zeit/next.js canary ijjk/next.js fix/link-ref-handling Change
Build Duration 15.3s 15.1s -255ms
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Total Bundle (main, webpack, commons) Size 210 kB 210 kB ✓
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Build Dir Size 1.94 MB 1.94 MB -314 B

@brad-decker
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Test:

  1. in dev mode preload two pages.
  2. hard refresh and trigger GC to get to a clean start
  3. start performance profiler
  4. run for 20 seconds flipping between the two pages
  5. wait for 5 seconds then end performance monitor
  6. repeat with this branch in my app using the file: pointer as per the contributor file.

before

image

after

image

Analysis

While I am still able to push my dom nodes to 20,000+ with this fix in, GC eventually returns the memory to me. At the end of the first test, there were still 27k dom nodes in memory. At the end of the second test, I had dropped down to 9k. Our pages need to be optimized for dom nodes, one of the two pages has 6k due to large custom SVGs that haven't been optimized yet. So 9k is reasonable :P

Conclusion

This is at least a step in the right direction. Our application has other unrelated memory leaks, but if I find anything else while we unravel these I can report them to you in any way you wish. Thank you both for the quick turnaround @ijjk and @timneutkens

@ijjk ijjk merged commit 4adef73 into vercel:canary Jul 14, 2019
@ijjk ijjk deleted the fix/link-ref-handling branch July 14, 2019 17:23
@Timer Timer added this to the 9.0.2 milestone Jul 15, 2019
@brad-decker brad-decker mentioned this pull request Jul 15, 2019
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@vercel vercel locked as resolved and limited conversation to collaborators Feb 1, 2022
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@brad-decker brad-decker brad-decker approved these changes

@timneutkens timneutkens timneutkens approved these changes

@lfades lfades Awaiting requested review from lfades

@Timer Timer Awaiting requested review from Timer

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@ijjk @brad-decker @timneutkens @Timer