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February 5, 2019 21:21
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Save OmarShehata/e6ba7d56cc711eafb99b1c17c14e05b0 to your computer and use it in GitHub Desktop.
Benchmark for createImageBitmap. Live version: http://omarshehata.me/static/bitmap.html
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>createImageBitmap</title> | |
| </head> | |
| <style> | |
| canvas { | |
| width:100%; | |
| height:100%; | |
| } | |
| html, body { | |
| margin:0px; | |
| padding:0px; | |
| } | |
| #info { | |
| font-size:20px; | |
| } | |
| </style> | |
| <body> | |
| <div class="info">createImageBitmap took: <span id="label">(loading)</span> ms.</div> | |
| <div class="info">decoding took: <span id="label2">(loading)</span> ms.</div> | |
| <div class="info">drawing took: <span id="label3">(loading)</span> ms.</div> | |
| <canvas></canvas> | |
| <script> | |
| let canvas = document.querySelector('canvas'); | |
| let ctx = canvas.getContext('2d'); | |
| let image = new Image(); | |
| image.onload = function() { | |
| var t0 = performance.now(); | |
| createImageBitmap(image) | |
| .then(function(im) { | |
| var t2 = performance.now(); | |
| console.log("Finished decoding in", (t2 - t0)); | |
| document.querySelector("#label2").innerHTML = Math.round(t2 - t0); | |
| ctx.drawImage(im, 0, 0, canvas.width, canvas.height); | |
| document.querySelector("#label3").innerHTML = Math.round(performance.now() - t0); | |
| }) | |
| .catch(console.error); | |
| var t1 = performance.now(); | |
| console.log("createImageBitmap took", Math.round(t1 - t0)); | |
| document.querySelector("#label").innerHTML = Math.round(t1 - t0); | |
| } | |
| image.src = 'world.jpg'; | |
| </script> | |
| </body> | |
| </html> |
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