Change `MAJOR_GC_INC_RATIO` to 120; ref
Because 200% is consumes too much memory for some cases.
MODIFY
src/gc.c
src/gc.c
@@ -344,7 +344,7 @@ add_heap(mrb_state *mrb, mrb_gc *gc)
#define DEFAULT_GC_INTERVAL_RATIO 200
#define DEFAULT_GC_STEP_RATIO 200
-#define MAJOR_GC_INC_RATIO 200
+#define MAJOR_GC_INC_RATIO 120
#define is_generational(gc) ((gc)->generational)
#define is_major_gc(gc) (is_generational(gc) && (gc)->full)
#define is_minor_gc(gc) (is_generational(gc) && !(gc)->full)

Change `MAJOR_GC_INC_RATIO` to 120; ref #3998

Because 200% is consumes too much memory for some cases.