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Fall back to insertBefore when the moved node was detached externally - #5244

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Fall back to insertBefore when the moved node was detached externally#5244
JoviDeCroock wants to merge 1 commit into
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JoviDeCroock/kabul

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@JoviDeCroock

@JoviDeCroock JoviDeCroock commented Sep 5, 2026

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moveBefore throws HierarchyRequestError when the node being moved has no parent, while insertBefore simply re-adopts it. If third-party code (an ad blocker, a drag-and-drop library, a translate extension) removes a keyed child and we later reorder that list, the whole render currently throws. This gates the moveBefore call on the node still having a parent, matching React's enableMoveBefore path.

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github-actions Bot commented Sep 5, 2026

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📊 Tachometer Benchmark Results

Summary

duration

  • create10k: unsure 🔍 -1% - +2% (-7.26ms - +13.71ms)
    preact-local vs preact-main
  • filter-list: unsure 🔍 -2% - +1% (-0.32ms - +0.23ms)
    preact-local vs preact-main
  • hydrate1k: unsure 🔍 -1% - +4% (-0.53ms - +1.78ms)
    preact-local vs preact-main
  • many-updates: unsure 🔍 -3% - +2% (-0.54ms - +0.38ms)
    preact-local vs preact-main
  • replace1k: unsure 🔍 -2% - +1% (-1.63ms - +1.01ms)
    preact-local vs preact-main
  • text-update: unsure 🔍 -1% - +9% (-0.01ms - +0.16ms)
    preact-local vs preact-main
  • todo: unsure 🔍 -2% - +2% (-0.60ms - +0.64ms)
    preact-local vs preact-main
  • update10th1k: unsure 🔍 -4% - +4% (-0.92ms - +1.17ms)
    preact-local vs preact-main

usedJSHeapSize

  • create10k: unsure 🔍 +0% - +0% (+0.00ms - +0.00ms)
    preact-local vs preact-main
  • filter-list: unsure 🔍 -0% - +0% (-0.00ms - +0.01ms)
    preact-local vs preact-main
  • hydrate1k: unsure 🔍 -5% - +7% (-0.35ms - +0.45ms)
    preact-local vs preact-main
  • many-updates: unsure 🔍 -0% - +0% (-0.00ms - +0.00ms)
    preact-local vs preact-main
  • replace1k: unsure 🔍 -0% - +0% (-0.00ms - +0.00ms)
    preact-local vs preact-main
  • text-update: unsure 🔍 -5% - +3% (-0.05ms - +0.03ms)
    preact-local vs preact-main
  • todo: unsure 🔍 +0% - +0% (+0.00ms - +0.00ms)
    preact-local vs preact-main
  • update10th1k: unsure 🔍 -0% - +0% (-0.01ms - +0.00ms)
    preact-local vs preact-main

Results

create10k

duration

VersionAvg timevs preact-localvs preact-main
preact-local562.28ms - 580.05ms-unsure 🔍
-1% - +2%
-7.26ms - +13.71ms
preact-main562.37ms - 573.51msunsure 🔍
-2% - +1%
-13.71ms - +7.26ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local19.07ms - 19.07ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main19.07ms - 19.07msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms
-
filter-list

duration

VersionAvg timevs preact-localvs preact-main
preact-local16.43ms - 16.83ms-unsure 🔍
-2% - +1%
-0.32ms - +0.23ms
preact-main16.48ms - 16.87msunsure 🔍
-1% - +2%
-0.23ms - +0.32ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local1.55ms - 1.56ms-unsure 🔍
-0% - +0%
-0.00ms - +0.01ms
preact-main1.55ms - 1.56msunsure 🔍
-0% - +0%
-0.01ms - +0.00ms
-
hydrate1k
  • Browser: chrome-headless
  • Sample size: 100
  • Built by: CI #5921
  • Commit: 9fe24eb

duration

VersionAvg timevs preact-localvs preact-main
preact-local48.14ms - 49.99ms-unsure 🔍
-1% - +4%
-0.53ms - +1.78ms
preact-main47.76ms - 49.13msunsure 🔍
-4% - +1%
-1.78ms - +0.53ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local6.24ms - 6.74ms-unsure 🔍
-5% - +7%
-0.35ms - +0.45ms
preact-main6.13ms - 6.75msunsure 🔍
-7% - +5%
-0.45ms - +0.35ms
-
many-updates

duration

VersionAvg timevs preact-localvs preact-main
preact-local16.35ms - 17.07ms-unsure 🔍
-3% - +2%
-0.54ms - +0.38ms
preact-main16.50ms - 17.07msunsure 🔍
-2% - +3%
-0.38ms - +0.54ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local3.74ms - 3.74ms-unsure 🔍
-0% - +0%
-0.00ms - +0.00ms
preact-main3.74ms - 3.74msunsure 🔍
-0% - +0%
-0.00ms - +0.00ms
-
replace1k
  • Browser: chrome-headless
  • Sample size: 100
  • Built by: CI #5921
  • Commit: 9fe24eb

duration

VersionAvg timevs preact-localvs preact-main
preact-local78.58ms - 80.32ms-unsure 🔍
-2% - +1%
-1.63ms - +1.01ms
preact-main78.77ms - 80.75msunsure 🔍
-1% - +2%
-1.01ms - +1.63ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local3.01ms - 3.01ms-unsure 🔍
-0% - +0%
-0.00ms - +0.00ms
preact-main3.01ms - 3.01msunsure 🔍
-0% - +0%
-0.00ms - +0.00ms
-

run-warmup-0

VersionAvg timevs preact-localvs preact-main
preact-local26.12ms - 27.34ms-unsure 🔍
-5% - +1%
-1.28ms - +0.26ms
preact-main26.77ms - 27.71msunsure 🔍
-1% - +5%
-0.26ms - +1.28ms
-

run-warmup-1

VersionAvg timevs preact-localvs preact-main
preact-local31.62ms - 33.16ms-unsure 🔍
-1% - +6%
-0.20ms - +1.79ms
preact-main30.97ms - 32.22msunsure 🔍
-5% - +1%
-1.79ms - +0.20ms
-

run-warmup-2

VersionAvg timevs preact-localvs preact-main
preact-local31.22ms - 32.85ms-unsure 🔍
-1% - +6%
-0.24ms - +1.91ms
preact-main30.50ms - 31.91msunsure 🔍
-6% - +1%
-1.91ms - +0.24ms
-

run-warmup-3

VersionAvg timevs preact-localvs preact-main
preact-local27.34ms - 28.28ms-unsure 🔍
-4% - +1%
-1.13ms - +0.26ms
preact-main27.73ms - 28.75msunsure 🔍
-1% - +4%
-0.26ms - +1.13ms
-

run-warmup-4

VersionAvg timevs preact-localvs preact-main
preact-local19.62ms - 20.01ms-unsure 🔍
-0% - +2%
-0.10ms - +0.33ms
preact-main19.62ms - 19.78msunsure 🔍
-2% - +0%
-0.33ms - +0.10ms
-

run-final

VersionAvg timevs preact-localvs preact-main
preact-local25.89ms - 26.27ms-unsure 🔍
-1% - +2%
-0.20ms - +0.42ms
preact-main25.72ms - 26.22msunsure 🔍
-2% - +1%
-0.42ms - +0.20ms
-
text-update
  • Browser: chrome-headless
  • Sample size: 210
  • Built by: CI #5921
  • Commit: 9fe24eb

duration

VersionAvg timevs preact-localvs preact-main
preact-local1.77ms - 1.90ms-unsure 🔍
-1% - +9%
-0.01ms - +0.16ms
preact-main1.70ms - 1.82msunsure 🔍
-9% - +0%
-0.16ms - +0.01ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local1.03ms - 1.09ms-unsure 🔍
-5% - +3%
-0.05ms - +0.03ms
preact-main1.04ms - 1.10msunsure 🔍
-3% - +5%
-0.03ms - +0.05ms
-
todo

duration

VersionAvg timevs preact-localvs preact-main
preact-local29.54ms - 30.29ms-unsure 🔍
-2% - +2%
-0.60ms - +0.64ms
preact-main29.40ms - 30.39msunsure 🔍
-2% - +2%
-0.64ms - +0.60ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local1.27ms - 1.27ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main1.27ms - 1.27msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms
-
update10th1k

duration

VersionAvg timevs preact-localvs preact-main
preact-local25.57ms - 26.93ms-unsure 🔍
-4% - +4%
-0.92ms - +1.17ms
preact-main25.34ms - 26.92msunsure 🔍
-4% - +3%
-1.17ms - +0.92ms
-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local2.96ms - 2.96ms-unsure 🔍
-0% - +0%
-0.01ms - +0.00ms
preact-main2.96ms - 2.97msunsure 🔍
-0% - +0%
-0.00ms - +0.01ms
-

tachometer-reporter-action v2 for CI

@github-actions

github-actions Bot commented Sep 5, 2026

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Size Change: +5 B (+0.03%)

Total Size: 15.9 kB

📦 View Changed
Filename Size Change
dist/preact.mjs 4.89 kB +5 B (+0.1%)
ℹ️ View Unchanged
Filename Size
compat/dist/compat.mjs 3.92 kB
debug/dist/debug.mjs 3.88 kB
devtools/dist/devtools.mjs 273 B
hooks/dist/hooks.mjs 1.58 kB
jsx-runtime/dist/jsxRuntime.mjs 868 B
test-utils/dist/testUtils.mjs 473 B

compressed-size-action

@coveralls

coveralls commented Sep 5, 2026

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Coverage Status

coverage: 99.856%. remained the same — JoviDeCroock/kabul into main

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2 participants