Everything but Julia code

This question is an effort to try and answer the question

Just how much can I modify a Julia program's behaviour without touching it's code?

And then try to turn all the different knobs and switches as possible.

You know, for science 🔭.

Allocators

• mimalloc

• tbballoc

• jemalloc

• hoard allocator

• mesh allocator

Linkers

• mold

LLVM options

• Optimized tablegen

• split debug dwarf

Garbage Collectors

• MMTK

• coz

Profiling and Debugging / Instrumentation

• valgrind

• pgo + LLVM Bolt

• lto ?

• debugging and rr

• AFL for fuzzing

• CReduce for finding errors