Fixes from Antonio. 1. I had -D_GLIBCXX_DEBUG=1 -D_GLIBCXX_DEBUG_PEDANTIC=1 in the meson.build. 2. The moa_many_for test had a copy-pasta extra extra for-loop that made it slow. Fix those two and the results match expectation with auto&:for doing better than indexing.

meson.build

@@ -2,7 +2,7 @@ project('sol2_test', 'cpp',
   version: '0.1.0',
   default_options: [
     'cpp_std=c++23',
-    'cpp_args=-D_GLIBCXX_DEBUG=1 -D_GLIBCXX_DEBUG_PEDANTIC=1',
+    # 'cpp_args=-D_GLIBCXX_DEBUG=1 -D_GLIBCXX_DEBUG_PEDANTIC=1',
   ])
 
 # use this for common options only for our executables

tests/perf_tests.cpp

@@ -360,7 +360,7 @@ namespace perf_tests {
     Stats moa_many_for;
     for(int i = 0; i < sample_number; i++) {
       auto start = moa_many_for.time_start();
-      for(int i = 0; i < sample_size; i++) {
+
       for(auto& el : moa->s1) {
         el.a01 += el.a02 + i;
         el.a02 += el.a03 + i;
@@ -407,9 +407,10 @@ namespace perf_tests {
         el.a18 += el.a19 + i;
         el.a19 += el.a20 + i;
       }
-      }
+
       moa_many_for.sample_time(start);
     }
+
     moa_many_for.dump("moa many for");
     fmt::println("-------------\n");
     samples.moa_many_for.push_back(moa_many_for);