headius

JRuby without any flags

JRuby's startup without any flags is not unreasonable, but we're starting from a bad place.

jruby -e 1  2.57s user 0.17s system 166% cpu 1.648 total
[] jruby $ time jruby -e 1
jruby -e 1  2.46s user 0.13s system 183% cpu 1.407 total
[] jruby $ time jruby -e 1
jruby -e 1  2.48s user 0.13s system 179% cpu 1.455 total

headius

These are resources suggested by my Java friends online.

Free online resources

• W3Schools Java tutorial A nice high-level tutorial of basic Java features.
• SAMS Teach Yourself Java There's multiple editions for different Java versions, so later editions may use features the robobrain doesn't support.
• Modern Java Recommended by someone who used this to teach his kids.

headius

private IRubyObject complexPowForSpecialAngle(ThreadContext context, IRubyObject other) {
    if (!(other instanceof RubyInteger integer)) {
        return UNDEF;
    }

    IRubyObject x = UNDEF;
    int dir;
    if (f_zero_p(context, image)) {
        x = real;
        dir = 0;

headius

~/work/jruby $ ~/amazon-corretto-25.0.0.1.1-linux-x64/bin/java -version
openjdk version "25" 2024-12-10
OpenJDK Runtime Environment Corretto-25.0.0.1.1 (build 25+1-Nightly)
OpenJDK 64-Bit Server VM Corretto-25.0.0.1.1 (build 25+1-Nightly, mixed mode, sharing)

~/work/jruby $ JAVA_OPTS="-XX:+UseParallelGC" jruby bench/bench_csv.rb 
WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::arrayBaseOffset has been called by org.jruby.util.StringSupport (file:/home/headius/work/jruby/lib/jruby.jar)
WARNING: Please consider reporting this to the maintainers of class org.jruby.util.StringSupport
WARNING: sun.misc.Unsafe::arrayBaseOffset will be removed in a future release

headius

diff --git a/core/src/main/java/org/jruby/RubyClass.java b/core/src/main/java/org/jruby/RubyClass.java
index 1d6c3c631f..bd7314e387 100644
--- a/core/src/main/java/org/jruby/RubyClass.java
+++ b/core/src/main/java/org/jruby/RubyClass.java
@@ -53,6 +53,8 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.*;
+import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
+import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;

headius

diff --git a/java/src/json/ext/GeneratorState.java b/java/src/json/ext/GeneratorState.java
index 909f1a5..e3000b8 100644
--- a/java/src/json/ext/GeneratorState.java
+++ b/java/src/json/ext/GeneratorState.java
@@ -158,41 +158,6 @@ public class GeneratorState extends RubyObject {
         return (GeneratorState)info.getSafeStatePrototype(context).dup();
     }
 
-    /**
-     * <code>State#initialize(opts = {})</code>

headius

--- ../rails/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb	2024-07-11 11:27:35
+++ ../activerecord-jdbc-adapter/lib/arjdbc/sqlite3/adapter.rb	2024-07-11 11:27:27
@@ -1,753 +1,884 @@
 # frozen_string_literal: true
 
+ArJdbc.load_java_part :SQLite3
+
+require "arjdbc/abstract/core"
+require "arjdbc/abstract/database_statements"
+require 'arjdbc/abstract/statement_cache'

headius

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x0000000104119800, pid=99782, tid=9475
#
# JRE version: OpenJDK Runtime Environment (24.0) (build 24-internal-adhoc.headius.jdk-iklam)
# Java VM: OpenJDK 64-Bit Server VM (24-internal-adhoc.headius.jdk-iklam, mixed mode, emulated-client, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-aarch64)
# Problematic frame:
# V  [libjvm.dylib+0x2c9800]  CompileBroker::compile_method(methodHandle const&, int, int, methodHandle const&, int, bool, CompileTask::CompileReason, JavaThread*)+0x94
#

headius

diff --git a/core/src/main/java/org/jruby/ParseResult.java b/core/src/main/java/org/jruby/ParseResult.java
index febaa15f82..216450f580 100644
--- a/core/src/main/java/org/jruby/ParseResult.java
+++ b/core/src/main/java/org/jruby/ParseResult.java
@@ -9,6 +9,9 @@ public interface ParseResult {
     DynamicScope getDynamicScope();
     int getLine();
     String getFile();
+    default String getBaseName() {
+        return getFile();

headius

diff --git a/core/src/main/java/org/jruby/RubyString.java b/core/src/main/java/org/jruby/RubyString.java
index 2b42e03515..3c2dd7dc11 100644
--- a/core/src/main/java/org/jruby/RubyString.java
+++ b/core/src/main/java/org/jruby/RubyString.java
@@ -1102,12 +1102,16 @@ public class RubyString extends RubyObject implements CharSequence, EncodingCapa
      */
     public static class FString extends RubyString {
         private IRubyObject converted;
+        private final RubyFixnum hash;
+        private final int hashCode;