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get rid of notify-debouncer in favor of our own debouncing #8793

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merged 5 commits into from
Jul 22, 2024

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@sokra sokra commented Jul 19, 2024

Description

notify-debouncer has two bugs:

  • Sometimes Create events are discarded when there is a Modify event too.
  • After a delete-restore cycle, rename events of the same file are discarded.

Since we don't need the combining feature of debouncer we can easily come up with our own debouncing solution within 3 lines of code.

Testing Instructions

@sokra sokra requested review from a team as code owners July 19, 2024 11:35
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github-actions bot commented Jul 19, 2024

🟢 Turbopack Benchmark CI successful 🟢

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github-actions bot commented Jul 19, 2024

⚠️ CI failed ⚠️

The following steps have failed in CI:

  • Turbopack Rust tests (mac/win, non-blocking)
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See workflow summary for details

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✅ This change can build next-swc

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@bgw bgw left a comment

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LTGM as is, left a couple of optional comments.

crates/turbo-tasks-fs/src/watcher.rs Outdated Show resolved Hide resolved
crates/turbo-tasks-fs/src/watcher.rs Show resolved Hide resolved
@sokra sokra enabled auto-merge (squash) July 22, 2024 07:25
@sokra sokra disabled auto-merge July 22, 2024 10:44
@sokra sokra merged commit 2e32756 into main Jul 22, 2024
58 of 62 checks passed
@sokra sokra deleted the sokra/watcher-bug branch July 22, 2024 10:45
sokra added a commit to vercel/next.js that referenced this pull request Jul 23, 2024
In larger apps, when compilation can take time and endpoints are often
build concurrently, `endpoint_server_changed_subscribe`’s subscription
to turbotasks can result in unnecessary calls of the JS callback even
when turbotasks input has not changed.

This wraps subscribing to issues and diagnostics in
`endpoint_server_changed_subscribe` within a turbotasks function that
ensures that inputs are properly consistent (e.g. diagnostics have been
sorted and are value-equal) so this callback is not called unnecessary.

Test Plan: Navigate within a large app and verify
`serverComponentChanges` messages are not sent through the web socket
connection and the browser does not perform unnecessary fetch requests
to rsc endpoints.

### Turbopack Changes

* vercel/turbo#8777 <!-- Tobias Koppers - merge
InProgressDirty into InProgress -->
* vercel/turbo#8785 <!-- Tobias Koppers - fix
watcher bug with file creation -->
* vercel/turbo#8793 <!-- Tobias Koppers - get
rid of notify-debouncer in favor of our own debouncing -->
* vercel/turbo#8805 <!-- Tobias Koppers - impl
Ord for Diagnostics and Issue so they are sorted correctly -->

---------

Co-authored-by: Tobias Koppers <tobias.koppers@googlemail.com>
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