[libcxx-commits] [libcxx] [libc++][hardening] Finish documenting hardening. (PR #92021)

[Konstantin Varlamov via libcxx-commits]

================
@@ -29,8 +29,11 @@ modes are:
   rigour impacts performance more than fast mode: we recommend benchmarking to
   determine if that is acceptable for your program.
 - **Debug mode**, which enables all the available checks in the library,
-  including internal assertions, some of which might be very expensive. This
-  mode is intended to be used for testing, not in production.
+  including heuristic checks that might have significant performance overhead as
+  well as internal library assertions. This mode should be used in
+  non-production environments (such as test suites, CI, or local development).
+  We don’t commit to a particular level of performance in this mode and it’s
+  *not* intended to be used in production.
----------------
var-const wrote:

I think this is absolutely worth documenting, but I'd prefer to do it at a later point after we spend more time restoring feature parity with the old debug mode and become more confident that this is the right approach.

https://github.com/llvm/llvm-project/pull/92021