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

This commit is contained in:

Kyle Evans

2019-12-12 01:35:56 +00:00

parent 5bff36fe81

commit bf47132605

1 changed files with 1 additions and 5 deletions

									
										stand/liblua/luaconf.h
									
		+1
		-5
	
												View File
												
					@@ -783,11 +783,7 @@

					** smaller buffer would force a memory allocation for each call to

					** smaller buffer would force a memory allocation for each call to

					** 'string.format'.)

					** 'string.format'.)

					*/

					*/

					#if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE

					#define LUAL_BUFFERSIZE		128

					#define LUAL_BUFFERSIZE		8192

					#else

					#define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))

					#endif

					/* }================================================================== */

					/* }================================================================== */