https://git.ruby-lang.org/ruby.git/commit/?id=651b832c1b

From 651b832c1b574df1c6095c49d77cccf0f250aa7f Mon Sep 17 00:00:00 2001
From: Matt Valentine-House <matt@e...>
Date: Fri, 1 Apr 2022 14:59:36 +0100
Subject: extract magic number from gc_sweep_step

---
 gc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index d0fd67b61e..bfd06200c0 100644
--- a/gc.c
+++ b/gc.c
@@ -954,6 +954,8 @@ struct heap_page { https://github.com/ruby/ruby/blob/trunk/gc.c#L954
 #define GET_HEAP_WB_UNPROTECTED_BITS(x) (&GET_HEAP_PAGE(x)->wb_unprotected_bits[0])
 #define GET_HEAP_MARKING_BITS(x)        (&GET_HEAP_PAGE(x)->marking_bits[0])
 
+#define GC_SWEEP_PAGES_FREEABLE_PER_STEP 3
+
 /* Aliases */
 #define rb_objspace (*rb_objspace_of(GET_VM()))
 #define rb_objspace_of(vm) ((vm)->objspace)
@@ -5678,7 +5680,7 @@ static int https://github.com/ruby/ruby/blob/trunk/gc.c#L5680
 gc_sweep_step(rb_objspace_t *objspace, rb_size_pool_t *size_pool, rb_heap_t *heap)
 {
     struct heap_page *sweep_page = heap->sweeping_page;
-    int unlink_limit = 3;
+    int unlink_limit = GC_SWEEP_PAGES_FREEABLE_PER_STEP;
 
 #if GC_ENABLE_INCREMENTAL_MARK
     int swept_slots = 0;
-- 
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