4 ms·

How legit is this? In my experience, every time I've updated iOS due to some urgent "security issue", the result was my phone just got a whole lot slower.

• kachapopopow 10mo ago
  that's because it jits code instead of pre-jitting like android does, so when you hit a piece of code that hasn't been compiled yet you perceive it as slowdown since the first time it runs it is emulated.
  • mmastrac 10mo ago
    This comment makes no sense. Both Swift and Objective C are precompiled languages.
    • kachapopopow 10mo ago
      swift compiles to bytecode, objective c I am not sure but I think that is native
      • mmastrac 10mo ago
        This is incorrect. Swift optionally compiles to _bitcode_ (+), which is pre-compiled by _Apple_ before distribution, not by your device itself. (+) Bitcode is now deprecated: https://digital.ai/catalyst-blog/navigating-apples-bitcode-changes/ https://digital.ai/catalyst-blog/navigating-apples-bitcode-c...
        • kachapopopow 10mo ago
          then it makes no sense why apple warns you that your device is performing "background" activities post update, last time I looked at iOS binaries they seem to decompile as-if it was bytecode - but it could also be related to more advanced debug directories haven't messed with internals of these devices since breaking the bootloader became pretty much impossible.
          • mmastrac 10mo ago
            SQLite migration scripts, indexing and vacuuming.