Restore the block length and add a comment.

23c5b625 · Raymond Hettinger · b424982a · 23c5b625
Commit 23c5b625 authored Oct 01, 2004 by Raymond Hettinger
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Modules/collectionsmodule.c Modules/collectionsmodule.c +7 -1

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--- a/Modules/collectionsmodule.c
+++ b/Modules/collectionsmodule.c
@@ -7,7 +7,13 @@
   All rights reserved.
 */

-#define BLOCKLEN 2
+/* The block length may be set to any number over 1.  Larger numbers
+ * reduce the number of calls to the memory allocator but take more
+ * memory.  Ideally, BLOCKLEN should be set with an eye to the
+ * length of a cache line.  
+ */
+
+#define BLOCKLEN 46
 #define CENTER ((BLOCKLEN - 1) / 2)

 /* A `dequeobject` is composed of a doubly-linked list of `block` nodes.