It would be nice if by default we didn't ship the optimizer infrastructure, since approximately nobody is going to use it, so we should ship (and by default build) binaries that just don't include it.

I propose to enable it only when configured with--enable-experimental-jit-interpreter. We drop support forPYTHON_UOPS and-Xuops, in favor ofPYTHON_JIT=0|1.

@mdboom this will have some consequences for the benchmarking infra; checking theTier 2 box should use this configure option rather than setting thePYTHON_UOPS=1 env var. It should be possible to use both (./configure gives a warning but otherwise seems to ignore incorrect flags, and the env var will just be ignored).

Linked PRs

• gh-118335: Configure Tier 2 interpreter at build time #118339
• gh-118335: Make REGEN_JIT_COMMAND empty if tier2 interpreter enabled #118493
• gh-118335: Rename --experimental-interpreter on Windows to --experimental-jit-interpreter #118497