Use hermes-windows 0.0.0-2604.6001-5335deff

[vmoroz]

Description

Type of Change

• Dependencies (updating a dependency version)

Why

Update the Hermes engine NuGet package to pick up the latest Hermes build from the hermes-windows repo.

What

• Updated HermesVersion in vnext/PropertySheets/JSEngine.props from 0.0.0-2512.22001-bc3d0ed7 to 0.0.0-2604.6001-5335deff
• Regenerated all packages.lock.json files across the repo to reflect the new package version (32 files updated)

NuGet package: https://www.nuget.org/packages/Microsoft.JavaScript.Hermes/0.0.0-2604.6001-5335deff

Screenshots

N/A

Testing

• Built vnext/ReactWindows-Desktop.sln (Debug|x64) successfully — all native projects compiled with no errors related to the Hermes update.

Changelog

Should this change be included in the release notes: no

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Performance Test Results

Branch: PR/use-hermes-0.0.0-2604.6001-5335deff
Commit: 2ca1f9d9
Time: 2026-04-21T18:34:10.610Z
Tests: 161/161 passed

✅ Passed

161 scenario(s) across 28 suite(s) — no regressions

SectionList

Scenario	Mean	Median	StdDev	Renders	vs Baseline
SectionList mount	5.20ms	5.00ms	±0.63ms	1	+0.0%
SectionList unmount	0.40ms	0.00ms	±0.52ms	0	+0.0%
SectionList rerender	12.20ms	11.00ms	±3.49ms	2	+4.8%
SectionList with-3-sections-15-items	5.80ms	6.00ms	±0.92ms	1	+9.1%
SectionList with-5-sections-50-items	6.40ms	6.00ms	±1.35ms	1	+0.0%
SectionList with-10-sections-200-items	6.40ms	6.00ms	±1.96ms	1	+9.1%
SectionList with-20-sections-200-items	5.80ms	5.00ms	±2.35ms	1	+0.0%
SectionList with-section-separator	3.90ms	2.50ms	±3.11ms	1	+25.0%
SectionList with-item-separator	5.90ms	3.00ms	±8.46ms	1	+50.0%
SectionList with-header-footer	2.20ms	2.00ms	±0.63ms	1	+0.0%
SectionList with-section-footer	2.30ms	2.00ms	±0.48ms	1	+0.0%
SectionList with-sticky-section-headers	1.80ms	2.00ms	±0.42ms	1	+0.0%
SectionList with-empty-list	0.40ms	0.00ms	±0.52ms	1	-100.0%
SectionList with-50-sections-1000-items	1.80ms	2.00ms	±0.42ms	1	+0.0%

FlatList

Scenario	Mean	Median	StdDev	Renders	vs Baseline
FlatList mount	4.20ms	4.00ms	±1.03ms	1	+0.0%
FlatList unmount	0.20ms	0.00ms	±0.42ms	0	+0.0%
FlatList rerender	10.90ms	11.00ms	±1.91ms	2	+22.2%
FlatList with-10-items	5.20ms	5.00ms	±0.63ms	1	+25.0%
FlatList with-100-items	5.60ms	5.00ms	±1.78ms	1	+0.0%
FlatList with-500-items	4.90ms	4.50ms	±0.99ms	1	+12.5%
FlatList with-1000-items	5.50ms	5.00ms	±1.35ms	1	+25.0%
FlatList horizontal	4.80ms	5.00ms	±1.14ms	1	+0.0%
FlatList with-separator	2.40ms	2.00ms	±0.52ms	1	+0.0%
FlatList with-header-footer	1.90ms	2.00ms	±0.57ms	1	+0.0%
FlatList with-empty-list	0.40ms	0.00ms	±0.52ms	1	-100.0%
FlatList with-get-item-layout	2.30ms	2.00ms	±2.06ms	1	+100.0%
FlatList inverted	1.50ms	1.50ms	±0.53ms	1	+0.0%
FlatList with-num-columns	2.60ms	3.00ms	±0.52ms	1	+0.0%

TouchableOpacity

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TouchableOpacity mount	1.00ms	1.00ms	±0.00ms	1	+0.0%
TouchableOpacity unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
TouchableOpacity rerender	1.80ms	1.50ms	±1.23ms	2	+50.0%
TouchableOpacity custom-active-opacity	0.70ms	1.00ms	±0.48ms	1	+0.0%
TouchableOpacity disabled	0.70ms	1.00ms	±0.48ms	1	+0.0%
TouchableOpacity with-all-handlers	0.50ms	0.50ms	±0.53ms	1	-50.0%
TouchableOpacity with-hit-slop	0.80ms	1.00ms	±0.63ms	1	+0.0%
TouchableOpacity with-delay	0.70ms	1.00ms	±0.48ms	1	+0.0%
TouchableOpacity nested	1.20ms	1.00ms	±0.42ms	1	+0.0%
TouchableOpacity multiple-10	6.20ms	5.00ms	±2.81ms	1	-16.7%
TouchableOpacity multiple-50	28.60ms	28.00ms	±3.16ms	1	-3.4%
TouchableOpacity multiple-100	42.53ms	48.00ms	±11.01ms	1	-4.0%

ScrollView

Scenario	Mean	Median	StdDev	Renders	vs Baseline
ScrollView mount	0.40ms	0.00ms	±0.52ms	1	+0.0%
ScrollView unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
ScrollView rerender	0.60ms	1.00ms	±0.52ms	2	+0.0%
ScrollView children-20	3.53ms	3.00ms	±1.30ms	1	-25.0%
ScrollView children-100	18.07ms	17.00ms	±3.10ms	1	+6.3%
ScrollView horizontal	3.40ms	3.00ms	±0.52ms	1	-25.0%
ScrollView sticky-headers	3.30ms	3.00ms	±1.25ms	1	+0.0%
ScrollView scroll-indicators	1.10ms	1.00ms	±1.79ms	1	+0.0%
ScrollView nested	1.40ms	1.00ms	±0.52ms	1	+0.0%
ScrollView content-container-style	0.80ms	1.00ms	±0.42ms	1	+0.0%
ScrollView children-500	22.27ms	21.00ms	±3.41ms	1	+10.5%

TouchableHighlight

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TouchableHighlight mount	0.50ms	0.50ms	±0.53ms	1	+0.0%
TouchableHighlight unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
TouchableHighlight rerender	0.70ms	1.00ms	±0.48ms	2	+0.0%
TouchableHighlight custom-underlay-color	0.30ms	0.00ms	±0.48ms	1	+0.0%
TouchableHighlight custom-active-opacity	0.30ms	0.00ms	±0.48ms	1	+0.0%
TouchableHighlight disabled	0.30ms	0.00ms	±0.48ms	1	+0.0%
TouchableHighlight with-all-handlers	0.40ms	0.00ms	±0.52ms	1	+0.0%
TouchableHighlight with-hit-slop	0.30ms	0.00ms	±0.48ms	1	+0.0%
TouchableHighlight nested-touchables	0.80ms	1.00ms	±0.42ms	1	+0.0%
TouchableHighlight multiple-touchables-10	2.70ms	3.00ms	±0.67ms	1	+0.0%
TouchableHighlight multiple-touchables-50	16.20ms	15.00ms	±3.82ms	1	+20.0%
TouchableHighlight multiple-touchables-100	28.10ms	27.50ms	±5.93ms	1	+22.2%

Pressable

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Pressable mount	0.50ms	0.50ms	±0.53ms	1	+Infinity%
Pressable unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Pressable rerender	0.60ms	1.00ms	±0.52ms	2	+100.0%
Pressable with-all-handlers	0.20ms	0.00ms	±0.42ms	1	+0.0%
Pressable with-style-function	0.50ms	0.50ms	±0.53ms	1	+Infinity%
Pressable disabled	0.40ms	0.00ms	±0.52ms	1	+0.0%
Pressable with-hit-slop	0.30ms	0.00ms	±0.48ms	1	+0.0%
Pressable nested	0.70ms	1.00ms	±0.48ms	1	+0.0%
Pressable multiple-10	3.07ms	3.00ms	±0.46ms	1	+0.0%
Pressable multiple-50	17.13ms	17.00ms	±1.68ms	1	+21.4%
Pressable multiple-100	18.07ms	12.00ms	±11.37ms	1	+0.0%

Modal

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Modal mount	0.30ms	0.00ms	±0.48ms	1	+0.0%
Modal unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Modal rerender	0.30ms	0.00ms	±0.48ms	2	+0.0%
Modal slide-animation	0.20ms	0.00ms	±0.42ms	1	+0.0%
Modal fade-animation	0.30ms	0.00ms	±0.48ms	1	+0.0%
Modal transparent	0.30ms	0.00ms	±0.48ms	1	+0.0%
Modal with-callbacks	0.20ms	0.00ms	±0.42ms	1	+0.0%
Modal rich-content	1.70ms	2.00ms	±0.48ms	1	+0.0%
Modal with-accessibility	0.40ms	0.00ms	±0.52ms	1	+0.0%

Image

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Image mount	0.00ms	0.00ms	±0.00ms	1	+0.0%
Image unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Image rerender	0.20ms	0.00ms	±0.42ms	2	+0.0%
Image with-resize-mode	0.70ms	0.00ms	±1.89ms	1	+0.0%
Image with-border-radius	0.10ms	0.00ms	±0.32ms	1	+0.0%
Image with-tint-color	0.10ms	0.00ms	±0.32ms	1	+0.0%
Image with-blur-radius	0.10ms	0.00ms	±0.32ms	1	+0.0%
Image with-accessibility	0.10ms	0.00ms	±0.32ms	1	+0.0%
Image multiple-10	1.00ms	1.00ms	±0.00ms	1	+0.0%
Image multiple-50	4.07ms	4.00ms	±1.16ms	1	+33.3%
Image multiple-100	8.80ms	9.00ms	±1.08ms	1	+12.5%

ActivityIndicator

Scenario	Mean	Median	StdDev	Renders	vs Baseline
ActivityIndicator mount	0.30ms	0.00ms	±0.48ms	1	+0.0%
ActivityIndicator unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
ActivityIndicator rerender	0.20ms	0.00ms	±0.42ms	2	+0.0%
ActivityIndicator size-large	0.10ms	0.00ms	±0.32ms	1	+0.0%
ActivityIndicator size-small	0.10ms	0.00ms	±0.32ms	1	+0.0%
ActivityIndicator with-color	0.20ms	0.00ms	±0.42ms	1	+0.0%
ActivityIndicator not-animating	0.10ms	0.00ms	±0.32ms	1	+0.0%
ActivityIndicator with-accessibility	0.20ms	0.00ms	±0.42ms	1	+0.0%
ActivityIndicator multiple-10	0.87ms	1.00ms	±0.35ms	1	+0.0%
ActivityIndicator multiple-50	4.40ms	5.00ms	±0.91ms	1	+25.0%
ActivityIndicator multiple-100	8.53ms	8.00ms	±1.30ms	1	+14.3%

Switch

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Switch mount	0.20ms	0.00ms	±0.42ms	1	+0.0%
Switch unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Switch rerender	0.40ms	0.00ms	±0.52ms	2	-100.0%
Switch value-true	0.30ms	0.00ms	±0.48ms	1	+0.0%
Switch disabled	0.10ms	0.00ms	±0.32ms	1	+0.0%
Switch custom-colors	0.40ms	0.00ms	±0.52ms	1	+0.0%
Switch on-value-change	0.20ms	0.00ms	±0.42ms	1	+0.0%
Switch with-accessibility	0.30ms	0.00ms	±0.48ms	1	+0.0%
Switch multiple-10	1.80ms	2.00ms	±1.26ms	1	+0.0%
Switch multiple-50	11.13ms	9.00ms	±4.27ms	1	+0.0%
Switch multiple-100	20.20ms	22.00ms	±3.30ms	1	+37.5%

Button

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Button mount	0.50ms	0.50ms	±0.53ms	1	-50.0%
Button unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Button rerender	1.00ms	1.00ms	±0.47ms	2	+0.0%
Button disabled	0.70ms	1.00ms	±0.48ms	1	+0.0%
Button with-color	1.00ms	1.00ms	±1.49ms	1	+100.0%
Button with-accessibility	0.50ms	0.50ms	±0.53ms	1	-50.0%
Button multiple-10	6.00ms	6.00ms	±1.36ms	1	+0.0%
Button multiple-50	23.87ms	26.00ms	±10.73ms	1	-3.7%
Button multiple-100	17.20ms	16.00ms	±2.78ms	1	-15.8%

TextInput

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TextInput mount	0.20ms	0.00ms	±0.42ms	1	+0.0%
TextInput unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
TextInput rerender	0.00ms	0.00ms	±0.00ms	2	+0.0%
TextInput multiline	0.10ms	0.00ms	±0.32ms	1	+0.0%
TextInput with-value	0.20ms	0.00ms	±0.42ms	1	+0.0%
TextInput styled	0.20ms	0.00ms	±0.42ms	1	+0.0%
TextInput multiple-100	8.20ms	8.00ms	±2.24ms	1	+14.3%

View

Scenario	Mean	Median	StdDev	Renders	vs Baseline
View mount	0.20ms	0.00ms	±0.42ms	1	+0.0%
View unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
View rerender	0.20ms	0.00ms	±0.42ms	2	+0.0%
View nested-50	3.33ms	3.00ms	±0.62ms	1	+0.0%
View nested-100	8.80ms	8.00ms	±1.78ms	1	+14.3%
View shadow	0.00ms	0.00ms	±0.00ms	1	+0.0%
View border-radius	0.20ms	0.00ms	±0.42ms	1	+0.0%
View nested-500	18.67ms	11.00ms	±13.99ms	1	+10.0%

Text

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Text mount	0.10ms	0.00ms	±0.32ms	1	+0.0%
Text unmount	0.00ms	0.00ms	±0.00ms	0	+0.0%
Text rerender	0.20ms	0.00ms	±0.42ms	2	+0.0%
Text long-1000	0.10ms	0.00ms	±0.32ms	1	+0.0%
Text nested	0.30ms	0.00ms	±0.48ms	1	+0.0%
Text styled	0.20ms	0.00ms	±0.42ms	1	+0.0%
Text multiple-100	8.67ms	8.00ms	±1.45ms	1	+14.3%

SectionList.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
SectionList native mount	5.19ms	5.12ms	±0.64ms	1	-21.4%

FlatList.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
FlatList native mount	5.30ms	4.92ms	±0.95ms	1	-46.7%

TouchableHighlight.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TouchableHighlight native mount	1.39ms	1.31ms	±0.24ms	1	-37.2%

TouchableOpacity.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TouchableOpacity native mount	1.83ms	1.63ms	±0.57ms	1	-48.1%

Pressable.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Pressable native mount	2.04ms	1.52ms	±1.38ms	1	-39.6%

ScrollView.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
ScrollView native mount	3.86ms	3.41ms	±1.19ms	1	-15.7%

ActivityIndicator.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
ActivityIndicator native mount	1.55ms	1.46ms	±0.25ms	1	-41.2%

TextInput.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
TextInput native mount	2.76ms	2.58ms	±0.69ms	1	-36.9%

Switch.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Switch native mount	1.35ms	1.25ms	±0.26ms	1	-27.9%

Button.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Button native mount	1.84ms	1.84ms	±0.16ms	1	-29.2%

Modal.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Modal native mount	1.03ms	1.05ms	±0.09ms	1	-13.8%

Image.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Image native mount	2.17ms	2.02ms	±0.59ms	1	-10.5%

View.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
View native mount	1.24ms	1.20ms	±0.22ms	1	-16.2%

Text.native-perf-test.ts

Scenario	Mean	Median	StdDev	Renders	vs Baseline
Text native mount	1.42ms	1.41ms	±0.17ms	1	-19.0%

[vmoroz]

Superseded by PR #16019