Triming runtime dispatching

Author: FranciscoThiesen

cppcon2025/cppcon_2025_slides.md

@@ -600,90 +600,10 @@ The magic:
 
 **Write once, works everywhere™**
 
-
----
-
-# Runtime dispatching
-
-- One function semantically
-- Several implementations
-- Select the best one at runtime for performance.
-
-
-
----
-
-# Issue: x64 processors support different instructions
-
-A Zen 5 CPU and a Pentium 4 CPU can be quite different.
-
-```cpp
-bool has_sse2() { /* query the CPU */ }
-bool has_avx2() { /* query the CPU */ }
-bool has_avx512() { /* query the CPU */ }
-```
-
-These functions cannot be `consteval`.
-
-
----
-
-<img src="images/dispatching.svg" width="50%">
-
----
-
-# Example: Sum function
-
-```cpp
-using SumFunc = float (*)(const float *, size_t);
-```
-
----
-
-# Setup a reassignable implementation
-
-
-```cpp
-SumFunc &get_sum_fnc() {
-  static SumFunc sum_impl = sum_init;
-  return sum_impl;
-}
-```
-
-We initialize it with some special initialization function.
-
-
-
----
-
-```cpp
-float sum_init(const float *data, size_t n) {
-  SumFunc &sum_impl = get_sum_fnc();
-  if (has_avx2()) {
-    sum_impl = sum_avx2;
-  } else if (has_sse2()) {
-    sum_impl = sum_sse2;
-  } else {
-    sum_impl = sum_generic;
-  }
-  return sum_impl(data, n);
-}
-```
-
-On first call, `get_sum_fnc()` is modified, and then it will remain constant.
-
----
-
-# Runtime dispatching and metaprogramming
-
-- Metaprogramming is at compile-time.
-- Runtime dispatching is fundamentally at runtime.
-
 ---
 
 # Does your string need escaping?
 
-
 - In JSON, you must escape control characters, quotes.
 - Most strings in practice do not need escaping.