What is the fastest method, to add a new value at the beginning of a string? Answer Wouldn’t this work for you?
Tag: performance
How to change the playing speed of videos in HTML5?
How to change the video play speed in HTML5? I’ve checked video tag’s attributes in w3school but couldn’t approach that. Answer According to this site, this is supported in the playbackRate and defaultPlaybackRate attributes, accessible via the DOM. Example: The above works on Chrome 43+, Firefox 20+, IE 9+, Edge 12+.
Is ternary operator, if-else or logical OR faster in javascript?
Which method is faster or more responsive in javascript, if-else, the ternary operator or logical OR? Which is advisable to use, for what reasons? Answer The speed difference will be negligible – use whichever you find to be more readable. In other words I highly doubt that a bottleneck in your code will be due to using the wrong conditional
fastest MD5 Implementation in JavaScript
There are many MD5 JavaScript implementations out there. Does anybody know which one is the most advanced, most bugfixed and fastest? I need it for this tool. Answer I’ve heard Joseph’s Myers implementation is quite fast. Additionally, he has a lengthy article on Javascript optimization describing what he learned while writing his implementation. It’s a good read for anyone interested
Does removing comments improve code performance? JavaScript
Does removing comments from JavaScript code improve performance? I realize that this is not great programing practice as comments form an intrinsic part of development. I am just interested to know if they do in fact add some overhead during compilation. Answer Whether your compiling or interpreting your JavaScript, the compiler/interpreter needs to look at the line, decide it’s a
Declaring multiple variables in JavaScript
In JavaScript, it is possible to declare multiple variables like this: …or like this: Is one method better/faster than the other? Answer The first way is easier to maintain. Each declaration is a single statement on a single line, so you can easily add, remove, and reorder the declarations. With the second way, it is annoying to remove the first
How to quickly clear a JavaScript Object?
With a JavaScript Array, I can reset it to an empty state with a single assignment: This makes the Array “appear” empty and ready to reuse, and as far as I understand is a single “operation” – that is, constant time. Is there a similar way to clear a JS Object? I know I can iterate its fields deleting them: