Benchmark: drawImage() scaling down performance

Script Preparation code:

$sourceWidth = 3000;
$sourceHeight = 3000;
$sourceCanvas = document.createElement("canvas");
$sourceCanvas.width = $sourceWidth;
$sourceCanvas.height = $sourceHeight;
$sourceContext = $sourceCanvas.getContext("2d");
$sourceContext.fillStyle = "rgba(0,100,200,1)";
$sourceContext.fillRect(0, 0, $sourceWidth, $sourceHeight);

$destCanvas = document.createElement("canvas");
$destCanvas.width = $sourceWidth;
$destCanvas.height = $sourceHeight;
$destContext = $destCanvas.getContext("2d");

Tests:

Scaling from a large canvas area to a small canvas area
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 100, 100); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);
Scaling from a large canvas area to a medium canvas area
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 600, 600); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);
Scaling from a large canvas area to a large canvas area (no scaling)
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, $sourceWidth, $sourceHeight); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Scaling from a large canvas area to a small canvas area
Scaling from a large canvas area to a medium canvas area
Scaling from a large canvas area to a large canvas area (no scaling)

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

View result in a separate tab

Test name	Executions per second
Scaling from a large canvas area to a small canvas area	9.1 Ops/sec
Scaling from a large canvas area to a medium canvas area	9.0 Ops/sec
Scaling from a large canvas area to a large canvas area (no scaling)	8.8 Ops/sec

drawImage() scaling down performance (version: 8)

Comparing performance of: Scaling from a large canvas area to a small canvas area vs Scaling from a large canvas area to a medium canvas area vs Scaling from a large canvas area to a large canvas area (no scaling)

Created: 3 years ago by: Registered User

Jump to the latest result

Scaling from a large canvas area to a small canvas area

Scaling from a large canvas area to a medium canvas area

Scaling from a large canvas area to a large canvas area (no scaling)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A