Working on the World of Raids Recruitment Tool we wanted automatic saving while editing. There are basically two ways of handling the problem.
- Send update everytime something changes. The main advantage of this technique is that you are always up to date. However, it is spamming the server on fields that are constantly being updated (text fields for example).
- Send update every X seconds. There is no longer query spike but there are two main disadvantages.
The delay the data are sent after a modification can vary from nothing to the timer length for no apparent reason. This is a really bad feeling for the user. He will think that the application is buggy.
The application is going to send queries all the time, even if there are no changes. We can safely assume that people are interacting a lot less than viewing so this is a real waste of resources.
We are interested in the first one, we want instant update but removing the ability to send too much data at once. What we want is to send data right after the user is done typing instead of everytime a character is typed. There is an easy way to do it in Javascript.
When you type the first character, it will start a timer of let say 100ms. Then everytime you type another character it resets the timer to 100ms. When it triggers, it will send data to the server.
This way, data will only be sent when the user interacts and with no risk of spamming the server.
var Object = {
/* Object Code ... */
timer: null,
sendChanges: function() {
if (this.timer) {
clearTimeout(timer);
this.timer = null;
}
this.timer = setTimeout(
function () { /* Send Changes */ },
200 /* Timeout in ms */
);
}
};
optimization
- Javascript – Sorting Table (0 Comments) -- January 8, 2010
For my new project on World of Raids I have to implement a table sorting. The browser not stable sorting and the faster sorting trick add difficulty to the task.
String Comparison
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- Bistromathique – Optimized Arbitrary Precision Calculator (0 Comments) -- January 3, 2010
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Base Representation
Going back and fort...
- Guild Recruitement – Search Optimizations (0 Comments) -- December 24, 2009
In World of Raids Guild Recruitment Tool, we wanted the search to be instant! We achieved this goal by not having a single page refresh or ajax call while updating the settings. Since it runs in the browser, performance was a real concern. We will see in this article what were the tricks used to mak...
- Speed Up Javascript Sort() (0 Comments) -- August 10, 2009
By overriding the toString Object prototype, it is possible to speed up by 5x the sort function. This is an easy to implement trick that gives astonishing results
I wanted to know if there were ways to speed up the Javascript Sort function. I came across an interesting article (Yet another faster...
- SmallHash – Information Compression (0 Comments) -- August 7, 2009
SmallHash encodes any range of integers into the smallest possible string. This way, you can use the hash part of your url with efficiency....
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