Using attribute

Author: hpjeonGIT

optimize_related.md

@@ -1,3 +1,7 @@
 # when clang/clang++ cannot deduce function matching
 - Disable optimization using `#pragma clang optimize off` in the top of the function
 - Ref: https://gcc.gnu.org/onlinedocs/gcc/Function-Specific-Option-Pragmas.html
+
+# using attribute
+- `#pragma gcc optimize off` may not work well
+- `bool __attribute__((optimize("O0"))) myfunc()` will work