| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <!-- |
| |
| /* |
| ** Copyright (c) 2012 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
| ** copy of this software and/or associated documentation files (the |
| ** "Materials"), to deal in the Materials without restriction, including |
| ** without limitation the rights to use, copy, modify, merge, publish, |
| ** distribute, sublicense, and/or sell copies of the Materials, and to |
| ** permit persons to whom the Materials are furnished to do so, subject to |
| ** the following conditions: |
| ** |
| ** The above copyright notice and this permission notice shall be included |
| ** in all copies or substantial portions of the Materials. |
| ** |
| ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| */ |
| |
| --> |
| <link rel="stylesheet" type="text/css" href="../unit.css" /> |
| <script type="application/javascript" src="../unit.js"></script> |
| <script type="application/javascript" src="../util.js"></script> |
| <script type="application/javascript"> |
| |
| Tests.autorun = false; |
| Tests.message = "This might take a second or two"; |
| |
| Tests.testGLOverhead = function() { |
| var gl = document.getElementById("gl").getContext(GL_CONTEXT_ID); |
| var fakeGl = {getError: function(){ return 0; }}; |
| time("testGLOverhead", function() { |
| for (var i=0; i<1000000; i++) |
| gl.getError(); |
| }); |
| time("testJSOverhead", function() { |
| for (var i=0; i<1000000; i++) |
| fakeGl.getError(); |
| }); |
| time("testLoopOverhead", function() { |
| for (var i=0; i<1000000;) |
| i++; |
| }); |
| } |
| |
| </script> |
| <style>canvas{ position:absolute; }</style> |
| </head><body> |
| <canvas id="gl" width="16" height="16"></canvas> |
| <h3>1000000x gl.getError() (measuring JS->GL call overhead)</h3> |
| <p id="testGLOverhead"></p> |
| <h3>1000000x fakeGl.getError() (measuring JS->JS call overhead)</h3> |
| <p id="testJSOverhead"></p> |
| <h3>1000000x i++ (measuring loop overhead)</h3> |
| <p id="testLoopOverhead"></p> |
| </body></html> |
| |
