Ruby Issue Tracking System

Today

01:11 PM Ruby Feature #22236 (Open): New API for adjustable JIT warmup

### Context
YJIT, and probably ZJIT in the near future, do provide a significant latency reduction once warmed up,
however, during the warmup phase they tend to cause significant overhead, which temporary degrade the service latency,... byroot (Jean Boussier)

08/07/2026

03:21 PM Ruby Revision cd070c05 (git): st.c: swap types of `entries_start` and `rebuilds_num`

A char is more than large enough for counting rebuilds, and it's
fine if it rolls over.
The table being rebuilt exactly 255 times between two check seems
impossible.
On the other hand, if `Hash#shift` is abused, `entries_start` is
more ... byroot (Jean Boussier)

08/06/2026

10:57 AM Ruby Revision 66c00fd5 (git): rb_hash_init: don't spill to `st_table` unless needed

Up to `RHASH_AR_TABLE_MAX_SIZE` there's no need to initialize
an `st_table`. byroot (Jean Boussier)

10:41 AM Ruby Revision 5b505f86 (git): Reduce RHASH_TBL_RAW usage

byroot (Jean Boussier)

10:09 AM Ruby Feature #22232: Deprecate `RHASH_TBL` and associated APIs

For `rb_hash_bulk_insert_into_st_table` which probably was never intended to be public API, there is only a single hit, and it's clearly
a misuse, it should use `rb_hash_bulk_insert: https://github.com/redcode/Z80-Ruby/blob/master/ext/z... byroot (Jean Boussier)

08:34 AM Ruby Feature #22232: Deprecate `RHASH_TBL` and associated APIs

The raw codesearch result https://gist.github.com/byroot/547f2b19e63efd0b2c974ff1f584751c, but it contains a lot of false positive, as many old gems seems to have:
```c
#ifndef RHASH_TBL
#define RHASH_TBL(x) RHASH->tbl
#endif
```
... byroot (Jean Boussier)

08:07 AM Ruby Feature #22232 (Open): Deprecate `RHASH_TBL` and associated APIs

I would like to deprecate `RHASH_TBL`, `RHASH_TBL_RAW` and `rb_hash_bulk_insert_into_st_table`.
### Problem
These API take a `RHash` instance and return its associated `st_table *`.
If the Hash isn't backed by an `st_table` it wil... byroot (Jean Boussier)

08:35 AM Ruby Feature #22222 (Closed): Expose a C API equivalent of `RubyVM::InstructionSequence.load_from_binary`

Applied in changeset commit:git|1ba809e748e04f03450a7f2148e5e860c64c57f0.
----------
C API: Expose `rb_iseq_load_from_binary`
[Feature #22222]
This allows to efficiently load iseq from mmaped files and other
buffers without having to ... byroot (Jean Boussier)

08:35 AM Ruby Revision 1ba809e7 (git): C API: Expose `rb_iseq_load_from_binary`

[Feature #22222]
This allows to efficiently load iseq from mmaped files and other
buffers without having to copy the bytes into a Ruby string an
then invoke `RubyVM::InstructionSequence.load_from_binary`. byroot (Jean Boussier)

08/05/2026

02:55 PM Ruby Feature #22229: Allow GCI.escapeHTML to take a custom escape table

> but what about a fixed Regexp with the characters to escape?
@Eregon please see the benchmark at https://github.com/ruby/cgi/pull/55, it doesn't compile a regexp every time and there's still a 5x difference.
I only did it in this... byroot (Jean Boussier)