Implement Process.warmup

[Feature #18885]

For now, the optimizations performed are:

  - Run a major GC
  - Compact the heap
  - Promote all surviving objects to oldgen

Other optimizations may follow.

1 files changed, 11 insertions, 0 deletions

diff --git a/spec/ruby/core/process/warmup_spec.rb b/spec/ruby/core/process/warmup_spec.rb
new file mode 100644
index 0000000000..b562d52d22
--- /dev/null
+++ b/spec/ruby/core/process/warmup_spec.rb
@@ -0,0 +1,11 @@
+require_relative '../../spec_helper'
+
+describe "Process.warmup" do
+  ruby_version_is "3.3" do
+    # The behavior is entirely implementation specific.
+    # Other implementations are free to just make it a noop
+    it "is implemented" do
+      Process.warmup.should == true
+    end
+  end
+end