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Implement streamed hydration rfc#5035

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JoviDeCroock wants to merge 2 commits into
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streamed-hydration
Open

Implement streamed hydration rfc#5035
JoviDeCroock wants to merge 2 commits into
mainfrom
streamed-hydration

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@JoviDeCroock
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@JoviDeCroock JoviDeCroock commented Feb 23, 2026

Resolves #5034

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github-actions Bot commented Feb 23, 2026 •
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📊 Tachometer Benchmark Results

Summary

duration

  • create10k: unsure 🔍 -1% - +0% (-9.22ms - +4.12ms)
    preact-local vs preact-main
  • filter-list: unsure 🔍 -0% - +0% (-0.06ms - +0.01ms)
    preact-local vs preact-main
  • hydrate1k: unsure 🔍 -3% - +2% (-1.45ms - +0.98ms)
    preact-local vs preact-main
  • many-updates: unsure 🔍 -4% - +3% (-0.64ms - +0.52ms)
    preact-local vs preact-main
  • replace1k: unsure 🔍 -1% - +2% (-0.85ms - +1.07ms)
    preact-local vs preact-main
  • text-update: unsure 🔍 -4% - +3% (-0.09ms - +0.06ms)
    preact-local vs preact-main
  • todo: unsure 🔍 -1% - +1% (-0.23ms - +0.36ms)
    preact-local vs preact-main
  • update10th1k: unsure 🔍 -3% - +4% (-1.17ms - +1.45ms)
    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 - +0.00ms)
    preact-local vs preact-main
  • hydrate1k: unsure 🔍 -3% - +4% (-0.16ms - +0.19ms)
    preact-local vs preact-main
  • many-updates: unsure 🔍 -0% - +0% (-0.01ms - +0.01ms)
    preact-local vs preact-main
  • replace1k: unsure 🔍 +0% - +0% (+0.00ms - +0.00ms)
    preact-local vs preact-main
  • text-update: unsure 🔍 -1% - +3% (-0.01ms - +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 - +0.01ms)
    preact-local vs preact-main

Results

create10k

duration

VersionAvg timevs preact-localvs preact-main
preact-local861.71ms - 870.53ms-unsure 🔍
-1% - +0%
-9.22ms - +4.12ms
preact-main863.67ms - 873.67msunsure 🔍
-0% - +1%
-4.12ms - +9.22ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local19.05ms - 19.05ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main19.05ms - 19.05msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms		-
filter-list

duration

VersionAvg timevs preact-localvs preact-main
preact-local16.52ms - 16.56ms-unsure 🔍
-0% - +0%
-0.06ms - +0.01ms
preact-main16.54ms - 16.59msunsure 🔍
-0% - +0%
-0.01ms - +0.06ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local1.55ms - 1.55ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main1.55ms - 1.55msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms		-
hydrate1k

duration

VersionAvg timevs preact-localvs preact-main
preact-local56.68ms - 58.74ms-unsure 🔍
-3% - +2%
-1.45ms - +0.98ms
preact-main57.30ms - 58.59msunsure 🔍
-2% - +3%
-0.98ms - +1.45ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local5.16ms - 5.41ms-unsure 🔍
-3% - +4%
-0.16ms - +0.19ms
preact-main5.14ms - 5.40msunsure 🔍
-4% - +3%
-0.19ms - +0.16ms		-
many-updates

duration

VersionAvg timevs preact-localvs preact-main
preact-local16.64ms - 17.22ms-unsure 🔍
-4% - +3%
-0.64ms - +0.52ms
preact-main16.49ms - 17.48msunsure 🔍
-3% - +4%
-0.52ms - +0.64ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local3.74ms - 3.75ms-unsure 🔍
-0% - +0%
-0.01ms - +0.01ms
preact-main3.73ms - 3.75msunsure 🔍
-0% - +0%
-0.01ms - +0.01ms		-
replace1k
  • Browser: chrome-headless
  • Sample size: 100
  • Built by: CI #5523

  • Commit: 21e9790

duration

VersionAvg timevs preact-localvs preact-main
preact-local61.14ms - 62.38ms-unsure 🔍
-1% - +2%
-0.85ms - +1.07ms
preact-main60.91ms - 62.39msunsure 🔍
-2% - +1%
-1.07ms - +0.85ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local3.00ms - 3.00ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main3.00ms - 3.00msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms		-

run-warmup-0

VersionAvg timevs preact-localvs preact-main
preact-local26.88ms - 27.63ms-unsure 🔍
-2% - +2%
-0.60ms - +0.54ms
preact-main26.86ms - 27.71msunsure 🔍
-2% - +2%
-0.54ms - +0.60ms		-

run-warmup-1

VersionAvg timevs preact-localvs preact-main
preact-local31.97ms - 32.98ms-slower ❌
0% - 4%
0.07ms - 1.39ms
preact-main31.33ms - 32.17msfaster ✔
0% - 4%
0.07ms - 1.39ms		-

run-warmup-2

VersionAvg timevs preact-localvs preact-main
preact-local32.09ms - 33.17ms-unsure 🔍
-1% - +3%
-0.48ms - +0.86ms
preact-main32.03ms - 32.84msunsure 🔍
-3% - +1%
-0.86ms - +0.48ms		-

run-warmup-3

VersionAvg timevs preact-localvs preact-main
preact-local26.78ms - 27.44ms-unsure 🔍
-1% - +3%
-0.36ms - +0.71ms
preact-main26.52ms - 27.35msunsure 🔍
-3% - +1%
-0.71ms - +0.36ms		-

run-warmup-4

VersionAvg timevs preact-localvs preact-main
preact-local26.70ms - 28.50ms-unsure 🔍
-5% - +5%
-1.30ms - +1.25ms
preact-main26.72ms - 28.52msunsure 🔍
-5% - +5%
-1.25ms - +1.30ms		-

run-final

VersionAvg timevs preact-localvs preact-main
preact-local21.31ms - 21.67ms-unsure 🔍
-2% - +1%
-0.49ms - +0.12ms
preact-main21.43ms - 21.92msunsure 🔍
-1% - +2%
-0.12ms - +0.49ms		-
text-update
  • Browser: chrome-headless
  • Sample size: 130
  • Built by: CI #5523

  • Commit: 21e9790

duration

VersionAvg timevs preact-localvs preact-main
preact-local1.84ms - 1.95ms-unsure 🔍
-4% - +3%
-0.09ms - +0.06ms
preact-main1.86ms - 1.96msunsure 🔍
-3% - +5%
-0.06ms - +0.09ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local0.99ms - 1.02ms-unsure 🔍
-1% - +3%
-0.01ms - +0.03ms
preact-main0.99ms - 1.01msunsure 🔍
-3% - +1%
-0.03ms - +0.01ms		-
todo

duration

VersionAvg timevs preact-localvs preact-main
preact-local29.97ms - 30.46ms-unsure 🔍
-1% - +1%
-0.23ms - +0.36ms
preact-main29.99ms - 30.30msunsure 🔍
-1% - +1%
-0.36ms - +0.23ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local1.26ms - 1.26ms-unsure 🔍
+0% - +0%
+0.00ms - +0.00ms
preact-main1.26ms - 1.26msunsure 🔍
-0% - -0%
-0.00ms - -0.00ms		-
update10th1k

duration

VersionAvg timevs preact-localvs preact-main
preact-local34.81ms - 36.58ms-unsure 🔍
-3% - +4%
-1.17ms - +1.45ms
preact-main34.59ms - 36.53msunsure 🔍
-4% - +3%
-1.45ms - +1.17ms		-

usedJSHeapSize

VersionAvg timevs preact-localvs preact-main
preact-local2.96ms - 2.98ms-unsure 🔍
-0% - +0%
-0.01ms - +0.01ms
preact-main2.96ms - 2.97msunsure 🔍
-0% - +0%
-0.01ms - +0.01ms		-

tachometer-reporter-action v2 for CI

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github-actions Bot commented Feb 23, 2026 •
edited
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Size Change: +211 B (+0.44%)

Total Size: 47.9 kB

📦 View Changed
Filename Size Change
dist/preact.js 4.82 kB +68 B (+1.43%)
dist/preact.mjs 4.84 kB +71 B (+1.49%)
dist/preact.umd.js 4.89 kB +72 B (+1.49%)
ℹ️ View Unchanged
Filename Size
compat/dist/compat.js 3.93 kB
compat/dist/compat.mjs 3.87 kB
compat/dist/compat.umd.js 4 kB
debug/dist/debug.js 3.91 kB
debug/dist/debug.mjs 3.91 kB
debug/dist/debug.umd.js 3.99 kB
devtools/dist/devtools.js 263 B
devtools/dist/devtools.mjs 273 B
devtools/dist/devtools.umd.js 348 B
hooks/dist/hooks.js 1.52 kB
hooks/dist/hooks.mjs 1.55 kB
hooks/dist/hooks.umd.js 1.58 kB
jsx-runtime/dist/jsxRuntime.js 892 B
jsx-runtime/dist/jsxRuntime.mjs 861 B
jsx-runtime/dist/jsxRuntime.umd.js 966 B
test-utils/dist/testUtils.js 473 B
test-utils/dist/testUtils.mjs 473 B
test-utils/dist/testUtils.umd.js 555 B

compressed-size-action

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coveralls commented Feb 23, 2026 •
edited
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Coverage Status

coverage: 98.528%. remained the same — streamed-hydration into main

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RFC: Streaming SSR Hydration Coordination for Preact Core

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@JoviDeCroock @coveralls @marvinhagemeister