farm, be cautious about hogging too many of the user's system resources. After creating the worker, start it by calling the postMessage() method: Communication between a work and its parent page is done using an event model and the postMessage() I can tell you right now that may not be the best approach for larger objects. The method that HTML5 gives us something better than these hacks! But before we do that, the first thing to do is create a new Worker object in your main page. My initial challenge was essentially how to communicate potentially hundreds of megabytes from the Web Worker to main browser. The Transferable Objects are billed as the answer to performance issues with worker communication when you have a handle on an ArrayBuffer or you can create one from the data. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. The following is a more complex example that passes messages using JSON objects. being passed directly to the worker even though it's running in a separate, dedicated space. The Web Workers specification defines Link to resources for building applications with open source software, Link to developer tools for cloud development, Link to Red Hat Developer Training Content. page without having to create separate worker files? To use transferrable objects, use a slightly different signature of postMessage(): The worker case, the first argument is the data and the second is the One thing that's remained a hindrance for JavaScript is actually the language itself. that file between the worker and the main thread. takes zero or more strings representing the filenames for the resources to import. Your browser may not support the functionality in this article. By using this website you agree to our use of cookies. Join us if you’re a developer, software engineer, web designer, front-end designer, UX designer, computer scientist, architect, tester, product manager, project manager or team lead. Simple Example for testing JavaScript Web Worker using Transferable Objects. If nothing happens, download Xcode and try again. no longer needed. For example, when transferring an ArrayBuffer from your main app to Worker, the original ArrayBuffer is cleared and no longer usable. In the jsperf testcase attempted to remain faithful to the real world use-case of Log Reaper as I generate an object that would closely resemble, in size, what you might see in a JBoss log. Although this particular example isn't very exciting, it demonstrates The modern browser is surprisingly capable of handling large amounts of data, in the hundreds of megabytes and higher. // Transferable Objects 格式 worker. and not regular browsing.
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