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   Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Saturday, 27-Jul-2024 08:38:43 JST Ryan Castellucci :nonbinary_flag:

   • josh

   @josh dev was doing some premature optimization, which i personally think is great fun, but it was not a good use of their time

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Saturday, 27-Jul-2024 08:42:30 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • josh

     @josh

     • hot path: code that runs a lot
     • profiling: a process that figures out which code is taking up how much time when a program runs
     • disassembled compiler output: the compiler turns code into cpu instructions - looking at this can give you some idea of how efficient the code is
     • the compiler: best thought of as an evil genie you asked to make your code run fast
   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Saturday, 27-Jul-2024 08:47:45 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • josh

     @josh A modern compiler can turn this:

     uint32_t example() {
     uint32_t val = 0, i = 0;
     for (i = 0; i < 100; ++i) {
     val = ((val + 1) * i) % 123456789;
     }
     return val;
     }
     

     into essentially

     uint32_t example() {
     return 83339357;
     }
     
   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Saturday, 27-Jul-2024 10:34:49 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • sabik
     • josh

     @sabik @josh Yup, that's the evil genie part.

   • Embed this notice
     sabik (sabik@rants.au)'s status on Saturday, 27-Jul-2024 10:34:50 JST sabik

     in reply to

     • josh

     @ryanc @josh
     Make the tiniest mistake, though, and the compiler will throw away the whole thing

     no error, no warning, if you try to use it, it'll just use a different one for you