[Interest] qml cache vs compiler

[Tim Blechmann]

>>>> Is it precompiled in 5.8 or is it kind of jit compilation?
>>>
>>> It's a cache of the JIT
>>>
>>  How does it improve the startup time? is it persistant between execution?
> 
> Yes, it's persistent between executions. It gets invalidated if the QtQml 
> library changes or if the source file does.

i wonder, how are changes to the QtQml library tested? is there some
built-in tag or ABI counter or does it rely on the (modification time of
the) executable? i'm thinking about linking qt statically ...