It's an estimator for application size and could be used as a
compilation heuristic later.

Co-authored-by: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com>
Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

* Port call threshold logic from Rust to C for performance

* Prefix global/field names with yjit_

* Fix linker error

* Fix preprocessor condition for rb_yjit_threshold_hit

* Fix third linker issue

* Exclude yjit_calls_at_interv from RJIT bindgen

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Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

* YJIT: Add counter to measure how often we compile "cold" ISEQs (#535)

Fix counter name in DEFAULT_COUNTERS

YJIT: add --yjit-cold-threshold, don't compile cold ISEQs

YJIT: increase default cold threshold to 200_000

Remove rb_yjit_call_threshold()

Remove conflict markers

Fix compilation errors

Threshold 1 should compile immediately

Debug deadlock issue with test_ractor

Fix call threshold issue with tests

* Revert exception threshold logic. Document option in yjid.md

* (void) for 0 parameter functions in C99

* Rename iseq_entry_cold => cold_iseq_entry

* Document --yjit-cold-threshold in ruby.c

* Update doc/yjit/yjit.md

Co-authored-by: Jean byroot Boussier <jean.boussier+github@shopify.com>

* Shorten help string to appease test

* Address bug found by Kokubun. Reorder logic.

---------

Co-authored-by: Alan Wu <XrXr@users.noreply.github.com>
Co-authored-by: Jean byroot Boussier <jean.boussier+github@shopify.com>

Co-authored-by: Maxime Chevalier-Boisvert <maximechevalierb@gmail.com>

* YJIT: refactoring to allow for fancier call threshold logic

* Avoid potentially compiling functions multiple times.

* Update vm.c

Co-authored-by: Alan Wu <XrXr@users.noreply.github.com>

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Co-authored-by: Alan Wu <XrXr@users.noreply.github.com>