Run results for: Overhead of saving and restoring context state

Run details:

User agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:97.0) Gecko/20100101 Firefox/97.0

Browser: Firefox 97

Operating system: Fedora

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Not saving and restoring context state	838.7 Ops/sec
Saving and restoring context state	668.1 Ops/sec

HTML Preparation code:

<canvas id="canvas" width="800" height="300"></canvas>

Script Preparation code:

$canvas = document.getElementById('canvas');
$context = $canvas.getContext('2d');
$context.clearRect(0, 0, 800, 300);

$iterations = 500;

Tests:

Not saving and restoring context state
for (let i=0; i<$iterations; ++i) { $context.fillStyle = 'rgba(100,150,200,0.9)'; $context.fillRect(0, 0, 1, 1); }
Saving and restoring context state
for (let i=0; i<$iterations; ++i) { $context.save(); $context.fillStyle = 'rgba(100,150,200,0.9)'; $context.fillRect(0, 0, 1, 1); $context.restore(); }