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Code Issues Releases Activity

stand: liblua: drop default buffer size to 128

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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
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355640
1 changed files with 1 additions and 5 deletions
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6
stand/liblua/luaconf.h
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@ -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
/* }================================================================== */