| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <html> |
| <head> |
| <title>Alloc memory</title> |
| <meta http-equiv="Cache-Control" content="no-store" /> |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> |
| </head> |
| <body> |
| <div id="display"> |
| Allocating memory... |
| </div> |
| <script> |
| function alloc(sizeMB) { |
| var FLOAT64_BYTES = 8; |
| var MB = 1024 * 1024; |
| var count = sizeMB* MB / FLOAT64_BYTES; |
| // Random content is uncompressable. |
| var content = new Float64Array(count); |
| for (var i = 0; i < content.length; i++) { |
| content[i] = Math.random(); |
| } |
| return content; |
| document.out = arr; |
| } |
| $(document).ready(function() { |
| var url = new URL(window.location.href); |
| var allocMB = parseInt(url.searchParams.get("alloc")); |
| if (isNaN(allocMB)) |
| allocMB = 800; |
| |
| var startTime = new Date(); |
| // Assigns the content to docuement to avoid optimization of unused data. |
| document.out = alloc(allocMB); |
| var ellapse = (new Date() - startTime) / 1000; |
| $("#display").text("Allocating " + allocMB + " MB takes " + ellapse + " seconds"); |
| }); |
| </script> |
| </body> |
| </html> |
