   cache optimization ?
  what is the best way for the cache ?this ?void func(void){   int a,b;   float c;}or this ?struct bob{   int a,b   float c;};void func(void){  bob myvar;}   !o) 
  Unless you''ve got a borked compiler or you''ve set the default struct alignment to something unreasonable, they should compile to the same machine code. ;  Ok thanks. 