Adjust some gen-gc array sizes.

Tuning some parameters by experimenting with
timings.

* gc.c (CHECKOBJ_VEC_SIZE): Reduce to 2*HEAP_SIZE;
this doesn't have to be equal in size to FRESHOBJ_VEC_SIZE;
entries into the checkobj array are not expected to
be as frequent as in the freshobj array.
(MUTOBJ_VEC_SIZE): On the other hand, at HEAP_SIZE/4,
this may be too small. Increasing to 2*HEAP_SIZE.
Overall, the storage for these arrays is reduced by
over 25%, with seemingly better performance.

1 files changed, 2 insertions, 2 deletions

diff --git a/gc.c b/gc.c
index 34edb9f4..2bffb65f 100644
--- a/gc.c
+++ b/gc.c
@@ -46,8 +46,8 @@
 
 #define PROT_STACK_SIZE         1024
 #define HEAP_SIZE               16384
-#define CHECKOBJ_VEC_SIZE       (8 * HEAP_SIZE)
-#define MUTOBJ_VEC_SIZE         (HEAP_SIZE / 4)
+#define CHECKOBJ_VEC_SIZE       (2 * HEAP_SIZE)
+#define MUTOBJ_VEC_SIZE         (2 * HEAP_SIZE)
 #define FULL_GC_INTERVAL        40
 #define FRESHOBJ_VEC_SIZE       (8 * HEAP_SIZE)
 #define DFL_MALLOC_DELTA_THRESH (64L * 1024 * 1024)