If you mean split-lock detection, it is because split locks are a massive DoS vulnerability on high core count CPUs.

I don't have a laptop with an nvidia card, but I often suspend the linux gaming machine on my living room, and sometimes it doesn't come back from sleep, while my steam deck never failed to.

  struct F { double x; };
  enum Op { Add, Mul };
  auto eval(F x) { return x.x; }
  template struct Expr;
  template struct Expr{  L l; R r; 
    friend auto eval(Expr self) { return eval(self.l) + eval(self.r); } };
  template struct Expr{  L l; R r; 
    friend auto eval(Expr self) { return eval(self.l) * eval(self.r); } };
  template struct Expr, R2, Add>{   Expr l; R2 r; 
    friend auto eval(Expr self) { return fma(eval(self.l.l), eval(self.l.r), eval(self.r));}};
  template
  auto operator +(L l, R r) { return Expr{l, r}; } 
  template
  auto operator *(L l, R r) { return Expr{l, r}; } 

  double optimized(F x, F y, F z) { return eval(x * y + z); }
  double non_optimized(F x, F y, F z) { return eval(x + y * z); }

The magic happens by specifically matching the pattern Expr, R2, Add>; try to add a rule to optimize x+y*z as well.

Comments URL: https://news.ycombinator.com/item?id=47599133

Points: 3

# Comments: 1

Of course in many cases the optimization level does matter: if you are optimizing small vector operators to simd inlining will still be important.

Specifically for the European Parliament, this is also why, while it is true it doesn't have the power of legislative initiative, given the ability to amend at will any "law", in practice it doesn't make much of a difference.

Probably it is not taught as part of the curriculum in Russia.

Many EU nations are not presidential, and personally I prefer parliamentary republics than presidential ones.

But the price of freedom is indeed eternal vigilance.