Specialize String#byteslice(a, b) (#9939)

* Specialize String#byteslice(a, b)

This adds a specialization for String#byteslice when there are two
parameters.

This makes our protobuf parser go from 5.84x slower to 5.33x slower

```
Comparison:
decode upstream (53738 bytes):     7228.5 i/s
decode protobuff (53738 bytes):     1236.8 i/s - 5.84x  slower

Comparison:
decode upstream (53738 bytes):     7024.8 i/s
decode protobuff (53738 bytes):     1318.5 i/s - 5.33x  slower
```

* Update yjit/src/codegen.rs

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

0 files changed, 0 insertions, 0 deletions