Linked by Thom Holwerda on Tue 10th Jul 2012 17:08 UTC
PDAs, Cellphones, Wireless I've been flashing CyanogenMod 9 nightlies for months now, and the process to do so has become pretty much muscle memory at this point (if cwm ever changes its menu order I'm screwed). One step of this process has always fascinated me simply because I have no idea what exactly it does and why I have to do it: clearing Dalvik cache.
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I could be wrong, but some of the optimizations could be between different intermediate files (classes for example), and if there is a slight change in one of those interfaces between versions, the optimizations might no longer work. Therefore it could result in failure to boot (if the application was critical to the system), or maybe just some force-closes.

Again, pure speculation...

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