Hi,

I'm dealing with a subtle problem. I'm trying to test the texture 
recognition algorithm of jsartoolkit, which is an emscripten port of 
artoolkit. The algorithm works correctly both with web worker and without 
web worker in desktop browsers, tested in desktop safari 11 beta and chrome 
60. When tested in mobile safari 11 beta in iOS and mobile chrome 59 in 
android, the algorithm works correctly without web worker, however, 
incorrectly when moving the algorithm to web worker in either iOS or 
android. Though, The same code with web worker works fine in desktop. I'm 
very confused with the result, so is there any hint to debug the problem, 
or is there any restriction to use asm.js in mobile browsers?

My first guess is virtual file system of emscripten, which is used in the 
algorithm. 
Maybe the sandbox restrict the virtual file system? I'm still debugging.

Need your help. Thanks in advance for your suggestions.

Best regards,

Sake.

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