Benchmarks

The same apps, in four frameworks.

The same small apps written with MyGo's native UI, GPUI, GPUI Fast and egui, each the usual way of its framework, showing the same text in windows of the same size, and measured on the same Mac.

The apps How they are measured The data

Starting and resting

A number and three buttons, then nothing to do: what an app costs before it does anything.

App size

A release build, with its symbols stripped.

MyGo9.7 MB
GPUI3.7 MB
GPUI Fast6.3 MB
egui8.7 MB

Startup

From starting the process until its first frame is drawn and its window is on screen.

MyGo173 msMyGo: 157 ms to 180 ms over 5 runs
GPUI157 msGPUI: 141 ms to 175 ms over 5 runs
GPUI Fast163 msGPUI Fast: 147 ms to 167 ms over 5 runs
egui163 msegui: 154 ms to 170 ms over 5 runs

Memory at rest

The physical footprint of the process 5 seconds after its first frame.

MyGo34.1 MBMyGo: 33.8 MB to 34.2 MB over 5 runs
GPUI33.7 MBGPUI: 33.7 MB to 33.9 MB over 5 runs
GPUI Fast34.6 MBGPUI Fast: 34.6 MB to 34.7 MB over 5 runs
egui58.4 MBegui: 57.0 MB to 58.6 MB over 5 runs

CPU at rest

The share of a core the process takes over the next 5 seconds, drawing nothing.

MyGo0.01%MyGo: 0.01% to 0.01% over 5 runs
GPUI0.42%GPUI: 0.33% to 0.46% over 5 runs
GPUI Fast0.01%GPUI Fast: 0.01% to 0.01% over 5 runs
egui0.01%egui: 0.01% to 0.01% over 5 runs

Scrolling a long list

A log viewer: 100,000 virtualized rows of three texts each, scrolling 8 DIPs every frame.

CPU per frame

The time the whole process spent on the CPU, its threads and the graphics driver's, for each frame.

MyGo2.71 msMyGo: 2.13 ms to 2.77 ms over 5 runs
GPUI2.54 msGPUI: 2.48 ms to 2.57 ms over 5 runs
GPUI Fast1.46 msGPUI Fast: 1.35 ms to 1.49 ms over 5 runs
egui2.13 msegui: 1.92 ms to 2.18 ms over 5 runs

Frame ratehigher is better

Frames a second. It stops at the display's refresh rate.

MyGo60.0 fpsMyGo: 60.0 fps to 60.0 fps over 5 runs
GPUI60.0 fpsGPUI: 60.0 fps to 60.0 fps over 5 runs
GPUI Fast60.0 fpsGPUI Fast: 60.0 fps to 60.0 fps over 5 runs
egui60.0 fpsegui: 59.9 fps to 60.0 fps over 5 runs

Slowest frames

The 99th percentile of the time between frames: what the worst 1% of frames look like.

MyGo16.8 msMyGo: 16.8 ms to 16.8 ms over 5 runs
GPUI18.6 msGPUI: 17.7 ms to 18.7 ms over 5 runs
GPUI Fast16.7 msGPUI Fast: 16.7 ms to 16.8 ms over 5 runs
egui17.4 msegui: 17.1 ms to 17.4 ms over 5 runs

Peak memory

The highest physical footprint of the process, as Activity Monitor shows it.

MyGo111 MBMyGo: 111 MB to 112 MB over 5 runs
GPUI93.8 MBGPUI: 93.7 MB to 101 MB over 5 runs
GPUI Fast117 MBGPUI Fast: 117 MB to 117 MB over 5 runs
egui168 MBegui: 142 MB to 180 MB over 5 runs

A live dashboard

600 cells, each with its own background and a number that changes every frame.

CPU per frame

The time the whole process spent on the CPU, its threads and the graphics driver's, for each frame.

MyGo5.71 msMyGo: 5.21 ms to 5.87 ms over 5 runs
GPUI13.9 msGPUI: 13.8 ms to 13.9 ms over 5 runs
GPUI Fast5.76 msGPUI Fast: 3.90 ms to 5.84 ms over 5 runs
egui5.43 msegui: 4.97 ms to 5.79 ms over 5 runs

Frame ratehigher is better

Frames a second. It stops at the display's refresh rate.

MyGo60.0 fpsMyGo: 60.0 fps to 60.0 fps over 5 runs
GPUI60.0 fpsGPUI: 60.0 fps to 60.0 fps over 5 runs
GPUI Fast60.0 fpsGPUI Fast: 60.0 fps to 60.0 fps over 5 runs
egui60.0 fpsegui: 60.0 fps to 60.0 fps over 5 runs

Slowest frames

The 99th percentile of the time between frames: what the worst 1% of frames look like.

MyGo16.8 msMyGo: 16.7 ms to 16.9 ms over 5 runs
GPUI18.5 msGPUI: 17.4 ms to 18.6 ms over 5 runs
GPUI Fast16.8 msGPUI Fast: 16.8 ms to 16.8 ms over 5 runs
egui17.7 msegui: 17.6 ms to 17.8 ms over 5 runs

Peak memory

The highest physical footprint of the process, as Activity Monitor shows it.

MyGo138 MBMyGo: 137 MB to 138 MB over 5 runs
GPUI106 MBGPUI: 106 MB to 107 MB over 5 runs
GPUI Fast122 MBGPUI Fast: 122 MB to 122 MB over 5 runs
egui145 MBegui: 144 MB to 152 MB over 5 runs

Resizing a document

40 paragraphs, about 20,000 characters, wrapped again to a width that changes every frame.

CPU per frame

The time the whole process spent on the CPU, its threads and the graphics driver's, for each frame.

MyGo4.92 msMyGo: 3.51 ms to 4.98 ms over 5 runs
GPUI3.03 msGPUI: 2.60 ms to 3.05 ms over 5 runs
GPUI Fast3.04 msGPUI Fast: 2.26 ms to 3.08 ms over 5 runs
egui6.04 msegui: 5.71 ms to 6.11 ms over 5 runs

Frame ratehigher is better

Frames a second. It stops at the display's refresh rate.

MyGo60.0 fpsMyGo: 60.0 fps to 60.0 fps over 5 runs
GPUI60.0 fpsGPUI: 60.0 fps to 60.0 fps over 5 runs
GPUI Fast60.0 fpsGPUI Fast: 60.0 fps to 60.0 fps over 5 runs
egui60.0 fpsegui: 60.0 fps to 60.0 fps over 5 runs

Slowest frames

The 99th percentile of the time between frames: what the worst 1% of frames look like.

MyGo16.8 msMyGo: 16.8 ms to 16.8 ms over 5 runs
GPUI18.6 msGPUI: 17.7 ms to 18.7 ms over 5 runs
GPUI Fast16.8 msGPUI Fast: 16.7 ms to 16.8 ms over 5 runs
egui17.2 msegui: 17.1 ms to 17.3 ms over 5 runs

Peak memory

The highest physical footprint of the process, as Activity Monitor shows it.

MyGo138 MBMyGo: 137 MB to 138 MB over 5 runs
GPUI104 MBGPUI: 104 MB to 104 MB over 5 runs
GPUI Fast112 MBGPUI Fast: 112 MB to 113 MB over 5 runs
egui175 MBegui: 169 MB to 175 MB over 5 runs

Reading the results

Shorter bars are better, but for frame rate. Each bar is the median of the runs: hover it for the lowest and the highest.
Frame rate stops at the display's refresh rate: an app below it missed frames. Time between frames is taken as each frame starts, not as it reaches the screen.
CPU time leaves out what the GPU does: two apps taking the same CPU may not cost the same to draw.
The Mac was in ordinary use during the runs. The frameworks took turns, so that this weighs on them alike.
CPU per frame has moved by as much as a third between full runs of the same build, more than the range of one run shows: read small gaps as ties.
MyGo's list measures its rows, which may differ in height, where the uniform lists of GPUI and GPUI Fast and egui's rows take one height for all.
GPUI Fast is a fork of GPUI that keeps what did not change between frames. Its list scrolls from outside the view, as a wheel does, so that its cached rows apply; the other scenes change every frame.
MyGo, GPUI and GPUI Fast draw text with the system's font and egui with its own. The crates of GPUI and GPUI Fast come without widgets, so their buttons are styled elements, and without scroll bars.

Measured: November 5, 2026
Machine: Apple M5, 10 CPUs, 32 GB of memory, 2560 x 1664 Retina
System: macOS 27.0
Frameworks: MyGo 0.7.4, GPUI 0.2.2, GPUI Fast 0.1.13, egui 0.37.0
Compilers: Go 1.27.3, Rust 1.99.1
Runs: 5 of each scene, 600 frames each, frameworks taking turns