Is there a way to run multiple JavaScript AJAX functions concurrently?
Is there a way to run multiple JavaScript AJAX functions concurrently?
It's important to note that Javascript operates in a single thread, making it impossible for two functions to run simultaneously. To work around this limitation, you need to execute one function after the other. The callbacks associated with each function will be triggered once data is received or an error/timeout occurs, potentially not in the order they were invoked. Only after the first callback finishes will the second one be able to execute.
Additionally, keep in mind that web browsers limit the number of active ajax calls. Trying to initiate too many ajax requests may cause some calls to wait until others have completed, essentially blocking all javascript code execution.
Discover the power of Web Workers, a cutting-edge feature found in current browsers but possibly not supported on outdated ones.
Does this meet your requirements?
executeAfterDelay('JavaScriptFunction1(value);', 0);
executeAfterDelay('JavaScriptFunction2(value);', 0);
Implementing Web Workers for Concurrent Task Execution
If you're looking to learn how to use Web Workers in parallel, check out this helpful tutorial: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers
Another useful resource is a library called Parallel.js, designed to optimize performance using web workers:
To enable parallel execution, you can utilize multiple instances of the 'setInterval' method, even though it may still be confined to a single core. The code snippet below demonstrates how you can parallelize a function named func with an array of data called 'datas'. Simply execute Parallel(func, datas) where func represents the name of your global function and datas is an array containing input data for func.
var i_array = new Array();
function Parallel(func, datas) {
$(datas).each(function(i, v) {
i_array[i] = setInterval(function() {
clearInterval(i_array[i]);
window[func](datas[i]);
}, 10);
});
}
You can test this functionality by following this jsfiddle link. The displayed timestamp in integer format demonstrates that both ajax calls are indeed running in parallel.
Implement window.open() to trigger a new page, which in turn will invoke the initial js function. By utilizing window.open(), you are essentially not obliged to wait for the completion of the first function. Your focus lies on the execution of window.open(), followed by the subsequent activation of the second function.
When it comes to Javascript, it operates on a single thread which means that if the tasks you need to perform do not involve any Input/Output operations (IO), then executing them simultaneously is not feasible. However, if an IO operation is part of the tasks, you can indeed run the two functions consecutively as Javascript will move on to the next function while waiting for the IO to complete. In contrast, other programming languages with threading support handle this process automatically during CPU idle periods for each thread.
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