The same apps, five frameworks.

Three small apps, written for each framework the way it is meant to be used, built as releases and measured one after another on the same machine.

Counter

A count and two buttons, left idle: how fast an app opens and what it costs to keep it open.

StartupLower is better

NSGo285 ms
GPUI Kit292 ms
GPUI Fast309 ms
NSH324 ms
MyGo397 ms

MemoryLower is better

NSH21.3 MB
NSGo24.9 MB
MyGo31.9 MB
GPUI Kit36.7 MB
GPUI Fast37.1 MB

Binary sizeLower is better

NSGo7.9 MB
MyGo10.2 MB
GPUI Kit15.0 MB
GPUI Fast16.6 MB
NSH33.0 MB

StartupLower is better

NSGo161 ms
NSH161 ms
MyGo165 ms
GPUI Kit187 ms
GPUI Fast188 ms

MemoryLower is better

NSGo59.2 MB
NSH60.3 MB
GPUI Kit61.4 MB
MyGo62.7 MB
GPUI Fast63.5 MB

Binary sizeLower is better

NSGo8.4 MB
MyGo11.0 MB
GPUI Kit19.0 MB
GPUI Fast21.4 MB
NSH45.4 MB

StartupLower is better

NSGo81 ms
NSH90 ms
GPUI Kit96 ms
GPUI Fast97 ms
MyGo98 ms

MemoryLower is better

GPUI Kit39.2 MB
NSGo47.6 MB
NSH50.0 MB
GPUI Fast53.8 MB
MyGo70.5 MB

Binary sizeLower is better

NSGo7.9 MB
MyGo10.5 MB
GPUI Kit38.7 MB
NSH40.1 MB
GPUI Fast41.1 MB

Streaming quotes

A table of 40 quotes, ten of which change every display frame, four texts each.

CPULower is better

GPUI Fast61.4%
NSH66.2%
MyGo66.6%
GPUI Kit72.2%
NSGo75.8%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

NSH36.7 MB
NSGo47.9 MB
GPUI Kit80.5 MB
MyGo84.6 MB
GPUI Fast85.1 MB

Frames per secondHigher is better

NSGo120
MyGo120
NSH120
GPUI Kit120
GPUI Fast120

Updates follow the display: an app that keeps up stays at its refresh rate.

CPULower is better

MyGo127.2%
GPUI Fast141.1%
NSH157.8%
GPUI Kit164.2%
NSGo175.6%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

GPUI Kit67.2 MB
NSH68.3 MB
GPUI Fast71.1 MB
NSGo76.2 MB
MyGo87.8 MB

Frames per secondHigher is better

NSH260
GPUI Kit260
GPUI Fast260
NSGo260
MyGo259

Updates follow the display: an app that keeps up stays at its refresh rate.

CPULower is better

GPUI Fast15.1%
MyGo15.6%
NSH19.4%
GPUI Kit21.2%
NSGo24.0%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

GPUI Kit54.8 MB
NSH55.5 MB
GPUI Fast59.3 MB
NSGo61.1 MB
MyGo93.3 MB

Frames per secondHigher is better

NSGo60
MyGo60
NSH60
GPUI Kit60
GPUI Fast60

Updates follow the display: an app that keeps up stays at its refresh rate.

Scrolling list

10,000 rows of a dot and two texts, scrolled a row further every display frame.

CPULower is better

NSH47.4%
GPUI Fast47.4%
NSGo52.3%
GPUI Kit53.7%
MyGo60.0%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

NSH31.3 MB
NSGo42.0 MB
MyGo67.9 MB
GPUI Kit69.3 MB
GPUI Fast75.4 MB

Frames per secondHigher is better

NSGo120
MyGo120
NSH120
GPUI Kit120
GPUI Fast120

Updates follow the display: an app that keeps up stays at its refresh rate.

CPULower is better

MyGo134.7%
GPUI Fast137.4%
GPUI Kit137.7%
NSH148.7%
NSGo154.9%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

GPUI Kit63.3 MB
NSH64.9 MB
GPUI Fast70.5 MB
NSGo71.5 MB
MyGo77.2 MB

Frames per secondHigher is better

NSGo260
NSH260
GPUI Kit260
GPUI Fast260
MyGo259

Updates follow the display: an app that keeps up stays at its refresh rate.

CPULower is better

GPUI Fast9.8%
GPUI Kit10.6%
NSH11.0%
MyGo11.2%
NSGo13.4%

AppCompositor

Percent of one core. Native views leave their drawing to the system compositor, where a GPU renderer draws in its own process, so each bar adds the compositor’s CPU to the app’s.

MemoryLower is better

NSH52.1 MB
GPUI Kit52.6 MB
NSGo56.0 MB
GPUI Fast58.6 MB
MyGo85.9 MB

Frames per secondHigher is better

NSGo61
MyGo60
NSH60
GPUI Kit60
GPUI Fast60

Updates follow the display: an app that keeps up stays at its refresh rate.

Measured on November 10, 2026 on Apple M1 Max with 34.36 GB of memory: the median of 3 runs, 10 s each.

Versions: NSGo 03896f1; MyGo v0.8.3; NSH 0.4.0; GPUI Kit gpui-kit 0.9.1, gpui-pre 0.3.12; GPUI Fast gpui-kit 0.9.1, gpui-fast 0.1.14

Measured on November 10, 2026 on Intel(R) Core(TM) Ultra 9 285K with 67.94 GB of memory: the median of 3 runs, 10 s each.

Versions: NSGo 03896f1; MyGo v0.8.3; NSH 0.4.0; GPUI Kit gpui-kit 0.9.1, gpui-pre 0.3.12; GPUI Fast gpui-kit 0.9.1, gpui-fast 0.1.14

Measured on November 10, 2026 on AMD Ryzen 9 6900HX with Radeon Graphics with 31.25 GB of memory: the median of 3 runs, 10 s each.

Versions: NSGo 03896f1; MyGo v0.8.3; NSH 0.4.0; GPUI Kit gpui-kit 0.9.1, gpui-pre 0.3.12; GPUI Fast gpui-kit 0.9.1, gpui-fast 0.1.14

Where each one runs.

	NSGo	MyGo	NSH	GPUI Kit	GPUI Fast
Building apps
Language	Go, TSX	Go	Rust, TSX	Rust	Rust
Drawn with	Native views	Its own GPU renderer	Native views	GPUI on the GPU	GPUI on the GPU, retained
Hot reload				—	—
Screens loaded at run time, signed		—		—	—
Desktop
macOS
Windows
Linux
Beyond the desktop
Web
iOS		—		—	—
Android		—		—	—
HarmonyOS	—	—		—	—
App Clips		—	—	—	—
tvOS		—	—	—	—
watchOS		—	—	—	—
Home screen widgets		—	—	—	—
Mini programs
WeChat		—		—	—
QQ		—	—	—	—
Alipay		—	—	—	—
Douyin		—	—	—	—

How it is measured.

Each app prints a line on its first frame, then every second how many frames it updated. The runner times the first line from the start and reads the process’s CPU time and memory from the system.
Startup runs from launching the binary to the first frame. Memory is read at the end of a run: the physical footprint on macOS, the proportional set size on Linux, the working set on Windows.
CPU is measured for 10 seconds after 3 to settle, the apps taking turns. The compositor is WindowServer on macOS, the Desktop Window Manager on Windows, and the Wayland compositor and Xwayland on Linux, less what it spends with none of the apps open.
Release builds: go build -ldflags "-s -w", and cargo build --release with symbols stripped. GPUI Kit and GPUI Fast share one source, built against upstream GPUI and against GPUI Fast.