Deep-freezing, as implemented has a number of problems:

• It is slow to build
• It does not fit into the normal build system, make will not recreate deep-frozen modules
• Deep-freezing only makes sense if the objects are immutable, but code objects are not (at the VM level)
• It is a bit slower
• It gets in the way of other optimizations, notable faster loading from pyc files.

So let's remove it.

But let's keep the ability to deep-freeze objects.
The ability to deep-freeze objects into the executable is valuable, we already do it with strings, and deep-freezing whole immutable object graphs like the sys and builtin modules could improve start up considerably.

Linked PRs

• GH-108716: Turn off deep-freezing of modules. #108722
• gh-108716: make regen-global-objects no longer builds deepfreeze.c #110078
• gh-108716: Cleanup remaining deepfreeze infrastructure #116919
• gh-108716:: Remove _PyStaticCode_Init/Fini #117141