Details
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Bug
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Resolution: Incomplete
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P2: Important
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5.15.0
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None
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Qt for WebAssembly 5.15 with both emscripten 1.39.8 and 2.0.0
Firefox 76 and later
Chrome 84 and later
Description
I've had some issues with Browser reporting problems ("A script is slowing down your browser") with a medium-sized Qt for WASM application.
Due to this, I've tried compiling Qt for WebAssembly and my application with current emscripten 2.0.0.
This version emits the following warning:
Blocking on the main thread is very dangerous, see https://emscripten.org/docs/porting/pthreads.html#blocking-on-the-main-browser-thread
qtloader.js:382:25
I understand that Qt currently has no official support for other emscripten versions than the one mentioned at https://doc.qt.io/qt-5/wasm.html. However, I think this is a serious issue that probably also affects those versions and should be handled.|