From ead3bbc2405ad1df2228c44133ee1c6574ef5973 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Thu, 13 Feb 2025 21:09:41 -0800
Subject: [PATCH] merge revision(s) d4a1a2780c39bc648496ac92fc6e6ce2eb38ab47:
 [Backport #21032]

	rb_feature_p: skip `get_expanded_load_path` for absolute paths

	Ref: https://github.com/fxn/zeitwerk/pull/308

	```ruby
	require 'benchmark'

	$LOAD_PATH << 'relative-path'

	autoload :FOO, '/tmp/foo.rb'

	puts Benchmark.realtime {
	  500_000.times do
	    Object.autoload?(:FOO)
	  end
	}
	```

	The above script takes 2.5 seconds on `master`, and only
	50ms on this branch.

	When we're looking for a feature with an absolute path, we don't
	need to call the expensive `get_expanded_load_path`.
---
 load.c    | 2 +-
 version.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/load.c b/load.c
index 68ee9d86ef..4ccd2ed20f 100644
--- a/load.c
+++ b/load.c
@@ -597,7 +597,7 @@ rb_feature_p(rb_vm_t *vm, const char *feature, const char *ext, int rb, int expa
 
     loading_tbl = get_loading_table(vm);
     f = 0;
-    if (!expanded) {
+    if (!expanded && !rb_is_absolute_path(feature)) {
         struct loaded_feature_searching fs;
         fs.name = feature;
         fs.len = len;
diff --git a/version.h b/version.h
index ce08b11d47..f97a24982c 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 19
+#define RUBY_PATCHLEVEL 20
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"