| use std::ops::Deref; | |
| struct Foo { | |
| a: u32 | |
| } | |
| impl Foo { | |
| fn bar(&self) { | |
| println!("bar: a={}, address of self={:x}", self.a, self as *const Foo as usize); | |
| } |
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
| /* Copyright (C) 2002 by Jilles Tjoelker */ | |
| /* revised by Zhihao Yuan, 2012 */ | |
| #include <sys/types.h> | |
| #include <sys/event.h> | |
| #include <sys/time.h> | |
| #include <err.h> | |
| #include <fcntl.h> | |
| #include <signal.h> |
| // Converts an ArrayBuffer directly to base64, without any intermediate 'convert to string then | |
| // use window.btoa' step. According to my tests, this appears to be a faster approach: | |
| // http://jsperf.com/encoding-xhr-image-data/5 | |
| /* | |
| MIT LICENSE | |
| Copyright 2011 Jon Leighton | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| <!-- modified from http://alex.dojotoolkit.org/08/jscript/lettable.html --> | |
| <html> | |
| <head> | |
| <title>A Crazy Getter/Setter Hack</title> | |
| </head> | |
| <body> | |
| <script language="VBScript" type="text/VBScript"> | |
| Function exec_vb_global(code) | |
| ExecuteGlobal(code) | |
| End Function |