Check preallocate new children array perf

[JoviDeCroock]

No description provided.

[github-actions]

📊 Tachometer Benchmark Results

Summary

duration

• create10k: unsure 🔍 -1% - +0% (-10.02ms - +2.26ms)
  ^{preact-local vs preact-main}
• filter-list: unsure 🔍 -0% - +3% (-0.03ms - +0.56ms)
  ^{preact-local vs preact-main}
• hydrate1k: faster ✔ 11% - 14% (7.70ms - 10.57ms)
  ^{preact-local vs preact-main}
• many-updates: slower ❌ 4% - 8% (0.67ms - 1.21ms)
  ^{preact-local vs preact-main}
• replace1k: faster ✔ 0% - 4% (0.13ms - 2.66ms)
  ^{preact-local vs preact-main}
• text-update: unsure 🔍 -6% - +3% (-0.13ms - +0.06ms)
  ^{preact-local vs preact-main}
• todo: unsure 🔍 -5% - +0% (-1.64ms - +0.03ms)
  ^{preact-local vs preact-main}
• update10th1k: faster ✔ 2% - 5% (0.62ms - 1.96ms)
  ^{preact-local vs preact-main}

usedJSHeapSize

• create10k: faster ✔ 23% - 23% (5.64ms - 5.64ms)
  ^{preact-local vs preact-main}
• filter-list: faster ✔ 6% - 9% (0.10ms - 0.14ms)
  ^{preact-local vs preact-main}
• hydrate1k: faster ✔ 10% - 18% (1.11ms - 2.16ms)
  ^{preact-local vs preact-main}
• many-updates: faster ✔ 16% - 17% (0.74ms - 0.76ms)
  ^{preact-local vs preact-main}
• replace1k: faster ✔ 16% - 17% (0.57ms - 0.59ms)
  ^{preact-local vs preact-main}
• text-update: slower ❌ 0% - 1% (0.00ms - 0.01ms)
  ^{preact-local vs preact-main}
• todo: unsure 🔍 -0% - +1% (-0.00ms - +0.01ms)
  ^{preact-local vs preact-main}
• update10th1k: faster ✔ 16% - 16% (0.55ms - 0.57ms)
  ^{preact-local vs preact-main}

Results

create10k

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	938.77ms - 948.77ms	-	unsure 🔍 -1% - +0% -10.02ms - +2.26ms
preact-main	944.10ms - 951.21ms	unsure 🔍 -0% - +1% -2.26ms - +10.02ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	19.21ms - 19.21ms	-	faster ✔ 23% - 23% 5.64ms - 5.64ms
preact-main	24.85ms - 24.85ms	slower ❌ 29% - 29% 5.64ms - 5.64ms	-

filter-list

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	16.55ms - 17.13ms	-	unsure 🔍 -0% - +3% -0.03ms - +0.56ms
preact-main	16.54ms - 16.62ms	unsure 🔍 -3% - +0% -0.56ms - +0.03ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.53ms - 1.56ms	-	faster ✔ 6% - 9% 0.10ms - 0.14ms
preact-main	1.65ms - 1.68ms	slower ❌ 7% - 9% 0.10ms - 0.14ms	-

hydrate1k

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	63.94ms - 64.82ms	-	faster ✔ 11% - 14% 7.70ms - 10.57ms
preact-main	72.14ms - 74.88ms	slower ❌ 12% - 16% 7.70ms - 10.57ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	9.68ms - 10.16ms	-	faster ✔ 10% - 18% 1.11ms - 2.16ms
preact-main	11.08ms - 12.02ms	slower ❌ 11% - 22% 1.11ms - 2.16ms	-

many-updates

• Browser: chrome-headless
• Sample size: 100
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	16.56ms - 16.76ms	-	slower ❌ 4% - 8% 0.67ms - 1.21ms
preact-main	15.46ms - 15.97ms	faster ✔ 4% - 7% 0.67ms - 1.21ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	3.76ms - 3.77ms	-	faster ✔ 16% - 17% 0.74ms - 0.76ms
preact-main	4.50ms - 4.52ms	slower ❌ 20% - 20% 0.74ms - 0.76ms	-

replace1k

• Browser: chrome-headless
• Sample size: 90
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	70.58ms - 71.92ms	-	faster ✔ 0% - 4% 0.13ms - 2.66ms
preact-main	71.58ms - 73.72ms	slower ❌ 0% - 4% 0.13ms - 2.66ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	2.97ms - 2.98ms	-	faster ✔ 16% - 17% 0.57ms - 0.59ms
preact-main	3.55ms - 3.56ms	slower ❌ 19% - 20% 0.57ms - 0.59ms	-

run-warmup-0

Version	Avg time	vs preact-local	vs preact-main
preact-local	31.48ms - 32.40ms	-	unsure 🔍 -2% - +2% -0.66ms - +0.55ms
preact-main	31.61ms - 32.39ms	unsure 🔍 -2% - +2% -0.55ms - +0.66ms	-

run-warmup-1

Version	Avg time	vs preact-local	vs preact-main
preact-local	36.30ms - 37.78ms	-	faster ✔ 0% - 6% 0.01ms - 2.19ms
preact-main	37.34ms - 38.94ms	unsure 🔍 -0% - +6% +0.01ms - +2.19ms	-

run-warmup-2

Version	Avg time	vs preact-local	vs preact-main
preact-local	27.26ms - 27.98ms	-	faster ✔ 12% - 15% 3.67ms - 4.96ms
preact-main	31.40ms - 32.47ms	slower ❌ 13% - 18% 3.67ms - 4.96ms	-

run-warmup-3

Version	Avg time	vs preact-local	vs preact-main
preact-local	26.96ms - 28.15ms	-	slower ❌ 12% - 19% 3.01ms - 4.39ms
preact-main	23.51ms - 24.20ms	faster ✔ 11% - 16% 3.01ms - 4.39ms	-

run-warmup-4

Version	Avg time	vs preact-local	vs preact-main
preact-local	25.43ms - 26.89ms	-	slower ❌ 11% - 18% 2.61ms - 4.13ms
preact-main	22.60ms - 22.98ms	faster ✔ 10% - 15% 2.61ms - 4.13ms	-

run-final

Version	Avg time	vs preact-local	vs preact-main
preact-local	22.96ms - 23.48ms	-	slower ❌ 7% - 11% 1.51ms - 2.33ms
preact-main	20.98ms - 21.62ms	faster ✔ 7% - 10% 1.51ms - 2.33ms	-

text-update

• Browser: chrome-headless
• Sample size: 220
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	2.08ms - 2.21ms	-	unsure 🔍 -6% - +3% -0.13ms - +0.06ms
preact-main	2.11ms - 2.25ms	unsure 🔍 -3% - +6% -0.06ms - +0.13ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.11ms - 1.12ms	-	slower ❌ 0% - 1% 0.00ms - 0.01ms
preact-main	1.10ms - 1.11ms	faster ✔ 0% - 1% 0.00ms - 0.01ms	-

todo

• Browser: chrome-headless
• Sample size: 50
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	33.05ms - 33.55ms	-	unsure 🔍 -5% - +0% -1.64ms - +0.03ms
preact-main	33.30ms - 34.90ms	unsure 🔍 -0% - +5% -0.03ms - +1.64ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	1.22ms - 1.24ms	-	unsure 🔍 -0% - +1% -0.00ms - +0.01ms
preact-main	1.22ms - 1.22ms	unsure 🔍 -1% - +0% -0.01ms - +0.00ms	-

update10th1k

• Browser: chrome-headless
• Sample size: 130
• Built by: CI #4172

• Commit: 2f5ca58

duration

Version	Avg time	vs preact-local	vs preact-main
preact-local	35.92ms - 36.91ms	-	faster ✔ 2% - 5% 0.62ms - 1.96ms
preact-main	37.25ms - 38.16ms	slower ❌ 2% - 5% 0.62ms - 1.96ms	-

usedJSHeapSize

Version	Avg time	vs preact-local	vs preact-main
preact-local	2.92ms - 2.94ms	-	faster ✔ 16% - 16% 0.55ms - 0.57ms
preact-main	3.49ms - 3.50ms	slower ❌ 19% - 20% 0.55ms - 0.57ms	-

_{tachometer-reporter-action v2 for CI}

[github-actions]

Size Change: +29 B (+0.05%)

Total Size: 62.4 kB

Filename	Size	Change
dist/preact.js	4.71 kB	+4 B (+0.08%)
dist/preact.min.js	4.73 kB	+5 B (+0.11%)
dist/preact.min.module.js	4.73 kB	+4 B (+0.08%)
dist/preact.min.umd.js	4.76 kB	+5 B (+0.11%)
dist/preact.module.js	4.74 kB	+6 B (+0.13%)
dist/preact.umd.js	4.78 kB	+5 B (+0.1%)

ℹ️ View Unchanged

Filename	Size
compat/dist/compat.js	4.13 kB
compat/dist/compat.module.js	4.06 kB
compat/dist/compat.umd.js	4.2 kB
debug/dist/debug.js	3.82 kB
debug/dist/debug.module.js	3.83 kB
debug/dist/debug.umd.js	3.9 kB
devtools/dist/devtools.js	260 B
devtools/dist/devtools.module.js	274 B
devtools/dist/devtools.umd.js	346 B
hooks/dist/hooks.js	1.52 kB
hooks/dist/hooks.module.js	1.56 kB
hooks/dist/hooks.umd.js	1.6 kB
jsx-runtime/dist/jsxRuntime.js	973 B
jsx-runtime/dist/jsxRuntime.module.js	947 B
jsx-runtime/dist/jsxRuntime.umd.js	1.05 kB
test-utils/dist/testUtils.js	451 B
test-utils/dist/testUtils.module.js	456 B
test-utils/dist/testUtils.umd.js	536 B

_{compressed-size-action}

[coveralls]

coverage: 99.617%. remained the same
when pulling 2f5ca58 on check-prealloc-perf
into 2d76a3b on main.

[rschristian]

Daaaamn