Hello,
I watched the WWDC 2013 session on integrating JavaScript into native apps and
so I implemented a JavaScript library for a Swift iOS app connecting via
JavaScriptCore. Although I don’t really know if this mail list is the correct
place to ask, I thought I’d give it a shot.
I really liked how easy it was to get Swift to work with JavaScript and vice
versa. But I stumbled upon a problem when I was testing the performance of my
app. I wrote a XCTest in Xcode which performs multiple calls of the JavaScript
library (with loops) but it always stops or freezes after the 292nd call.
I guess that the JavaScriptCore context (or virtual machine) are not
deinitialized after the method call was successful. I even tried a manual
deinitialize but it still freezes. I looked up the allocations in Instruments
and it shows multiple VM: JS garbage collector allocations which are still
active in the app.
I wrote a question on StackOverflow with some code examples and the Instruments
log:
http://stackoverflow.com/questions/30443993/javascriptcore-on-ios-vm-garbage-collector-not-automatically-emtpying
http://stackoverflow.com/questions/30443993/javascriptcore-on-ios-vm-garbage-collector-not-automatically-emtpying
but I haven’t received a single answer yet. I guess JavaScriptCore on iOS is
still something that is not being used very much.
I would be very happy if someone could take a look into my problem and share
thoughts on it. This is part of my bachelor thesis so it would really help me a
lot.
Thank you in advance and best regards,
Max Hentschel
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