svn commit: r355640 - head/stand/liblua

[Kyle Evans]

Author: kevans
Date: Thu Dec 12 01:35:56 2019
New Revision: 355640
URL: https://svnweb.freebsd.org/changeset/base/355640

Log:
  stand: liblua: drop default buffer size to 128
  
  Lua allocates LUAL_BUFFERSIZE buffers on the stack for various string
  functions (string.format, string.gsub) -- this works out to be somewhat
  significant and not necessary, based on how we use string operations.
  Dropping it risks having to allocate per call to format/gsub, but this is
  not the case for our usage. This simply stops allocating 8K buffers on the
  stack when luaL_Buffer is used.
  
  Reviewed by:	imp
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D22500

Modified:
  head/stand/liblua/luaconf.h

Modified: head/stand/liblua/luaconf.h
==============================================================================
--- head/stand/liblua/luaconf.h	Thu Dec 12 01:33:45 2019	(r355639)
+++ head/stand/liblua/luaconf.h	Thu Dec 12 01:35:56 2019	(r355640)
@@ -783,11 +783,7 @@
 ** smaller buffer would force a memory allocation for each call to
 ** 'string.format'.)
 */
-#if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE
-#define LUAL_BUFFERSIZE		8192
-#else
-#define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
-#endif
+#define LUAL_BUFFERSIZE		128
 
 /* }================================================================== */