Run results for: image from ImageDecoder vs native image src

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.4

Device Platform: Mobile

Date tested: one year ago

from ImageDecoder

468K/s

from native

1K/s

View exact numbers

Test name	Executions per second
✓ from ImageDecoder	468,064 Ops/sec
from native	1,083 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

from ImageDecoder
(async () => { let init = { type: "image/png", data: imageByteStream, }; const resp = await fetch('https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png'); const imageDecoder = new ImageDecoder({ data: resp.body, type: "image/png" }); const frame = await decoder.decode(); const bitmap = frame.image; const image = new Image(); image.src = URL.createObjectURL(bitmap); })();
from native
const img = new Image(); img.src = 'https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png';