feat: implement getServerSnapshot for useSyncExternalStore

[ssssota]

close #4972

[github-actions]

📊 Tachometer Benchmark Results

Summary

duration

• create10k: unsure 🔍 -1% - +0% (-8.14ms - +1.88ms)
  ^{preact-local vs preact-main}
• filter-list: unsure 🔍 -0% - +0% (-0.04ms - +0.06ms)
  ^{preact-local vs preact-main}
• hydrate1k: unsure 🔍 -1% - +2% (-0.49ms - +1.51ms)
  ^{preact-local vs preact-main}
• many-updates: unsure 🔍 -2% - +2% (-0.42ms - +0.38ms)
  ^{preact-local vs preact-main}
• replace1k: unsure 🔍 -1% - +2% (-0.71ms - +0.96ms)
  ^{preact-local vs preact-main}
• text-update: unsure 🔍 -2% - +10% (-0.04ms - +0.20ms)
  ^{preact-local vs preact-main}
• todo: unsure 🔍 -1% - +0% (-0.26ms - +0.12ms)
  ^{preact-local vs preact-main}
• update10th1k: faster ✔ 3% - 8% (0.97ms - 2.55ms)
  ^{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 🔍 -4% - +6% (-0.26ms - +0.43ms)
  ^{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 🔍 -1% - +4% (-0.01ms - +0.04ms)
  ^{preact-local vs preact-main}
• todo: unsure 🔍 -0% - +0% (-0.00ms - +0.00ms)
  ^{preact-local vs preact-main}
• update10th1k: faster ✔ 0% - 1% (0.01ms - 0.02ms)
  ^{preact-local vs preact-main}

Results

create10k

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	865.23ms - 870.05ms	-	unsure 🔍 -1% - +0% -8.14ms - +1.88ms
preact-main	866.37ms - 875.16ms	unsure 🔍 -0% - +1% -1.88ms - +8.14ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	19.04ms - 19.04ms	-	unsure 🔍 -0% - +0% -0.00ms - +0.00ms
preact-main	19.04ms - 19.04ms	unsure 🔍 -0% - +0% -0.00ms - +0.00ms	-

filter-list

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	16.49ms - 16.59ms	-	unsure 🔍 -0% - +0% -0.04ms - +0.06ms
preact-main	16.51ms - 16.55ms	unsure 🔍 -0% - +0% -0.06ms - +0.04ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.54ms - 1.54ms	-	unsure 🔍 -0% - +0% -0.00ms - +0.00ms
preact-main	1.54ms - 1.54ms	unsure 🔍 -0% - +0% -0.00ms - +0.00ms	-

hydrate1k

• Browser: chrome-headless
• Sample size: 90
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	67.09ms - 68.50ms	-	unsure 🔍 -1% - +2% -0.49ms - +1.51ms
preact-main	66.57ms - 68.00ms	unsure 🔍 -2% - +1% -1.51ms - +0.49ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	7.00ms - 7.50ms	-	unsure 🔍 -4% - +6% -0.26ms - +0.43ms
preact-main	6.93ms - 7.40ms	unsure 🔍 -6% - +4% -0.43ms - +0.26ms	-

many-updates

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	16.50ms - 17.05ms	-	unsure 🔍 -2% - +2% -0.42ms - +0.38ms
preact-main	16.50ms - 17.08ms	unsure 🔍 -2% - +2% -0.38ms - +0.42ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	3.72ms - 3.72ms	-	unsure 🔍 -0% - +0% -0.00ms - +0.00ms
preact-main	3.72ms - 3.72ms	unsure 🔍 -0% - +0% -0.00ms - +0.00ms	-

replace1k

• Browser: chrome-headless
• Sample size: 100
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	56.93ms - 58.17ms	-	unsure 🔍 -1% - +2% -0.71ms - +0.96ms
preact-main	56.86ms - 57.99ms	unsure 🔍 -2% - +1% -0.96ms - +0.71ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	2.99ms - 2.99ms	-	unsure 🔍 -0% - +0% -0.00ms - +0.00ms
preact-main	2.99ms - 2.99ms	unsure 🔍 -0% - +0% -0.00ms - +0.00ms	-

run-warmup-0

Version	Avg time	vs preact-local	vs preact-main
preact-local	25.65ms - 26.39ms	-	unsure 🔍 -3% - +2% -0.76ms - +0.41ms
preact-main	25.74ms - 26.64ms	unsure 🔍 -2% - +3% -0.41ms - +0.76ms	-

run-warmup-1

Version	Avg time	vs preact-local	vs preact-main
preact-local	31.81ms - 32.79ms	-	unsure 🔍 -3% - +1% -1.00ms - +0.38ms
preact-main	32.12ms - 33.10ms	unsure 🔍 -1% - +3% -0.38ms - +1.00ms	-

run-warmup-2

Version	Avg time	vs preact-local	vs preact-main
preact-local	32.59ms - 33.41ms	-	unsure 🔍 -1% - +3% -0.24ms - +0.87ms
preact-main	32.31ms - 33.06ms	unsure 🔍 -3% - +1% -0.87ms - +0.24ms	-

run-warmup-3

Version	Avg time	vs preact-local	vs preact-main
preact-local	25.49ms - 25.94ms	-	unsure 🔍 -1% - +2% -0.16ms - +0.40ms
preact-main	25.43ms - 25.76ms	unsure 🔍 -2% - +1% -0.40ms - +0.16ms	-

run-warmup-4

Version	Avg time	vs preact-local	vs preact-main
preact-local	24.34ms - 25.69ms	-	unsure 🔍 -5% - +3% -1.16ms - +0.74ms
preact-main	24.56ms - 25.89ms	unsure 🔍 -3% - +5% -0.74ms - +1.16ms	-

run-final

Version	Avg time	vs preact-local	vs preact-main
preact-local	21.09ms - 21.66ms	-	unsure 🔍 -1% - +3% -0.18ms - +0.56ms
preact-main	20.95ms - 21.42ms	unsure 🔍 -3% - +1% -0.56ms - +0.18ms	-

text-update

• Browser: chrome-headless
• Sample size: 240
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.90ms - 2.08ms	-	unsure 🔍 -2% - +10% -0.04ms - +0.20ms
preact-main	1.84ms - 1.98ms	unsure 🔍 -10% - +2% -0.20ms - +0.04ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.00ms - 1.04ms	-	unsure 🔍 -1% - +4% -0.01ms - +0.04ms
preact-main	0.99ms - 1.02ms	unsure 🔍 -4% - +1% -0.04ms - +0.01ms	-

todo

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	30.82ms - 31.10ms	-	unsure 🔍 -1% - +0% -0.26ms - +0.12ms
preact-main	30.90ms - 31.16ms	unsure 🔍 -0% - +1% -0.12ms - +0.26ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.26ms - 1.26ms	-	unsure 🔍 -0% - +0% -0.00ms - +0.00ms
preact-main	1.26ms - 1.26ms	unsure 🔍 -0% - +0% -0.00ms - +0.00ms	-

update10th1k

• Browser: chrome-headless
• Sample size: 130
• Built by: CI #5255

• Commit: 7c07af8

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	29.78ms - 30.88ms	-	faster ✔ 3% - 8% 0.97ms - 2.55ms
preact-main	31.52ms - 32.66ms	slower ❌ 3% - 8% 0.97ms - 2.55ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	2.95ms - 2.96ms	-	faster ✔ 0% - 1% 0.01ms - 0.02ms
preact-main	2.96ms - 2.97ms	slower ❌ 0% - 1% 0.01ms - 0.02ms	-

_{tachometer-reporter-action v2 for CI}

[coveralls]

coverage: 99.449% (+0.006%) from 99.443%
when pulling 7c07af8 on ssssota:getServerSnapshot
into 5a02923 on preactjs:main.