Optimize table length computation with hinting.

10x faster on loop with t[#t+1] = x idiom. Also used by table.insert.
2020-05-27 19:20:44 +02:00
parent b2307c8ad8
commit 1a4ff13117
12 changed files with 135 additions and 82 deletions
--- a/src/lj_ircall.h
+++ b/src/lj_ircall.h
@@ -168,6 +168,7 @@ typedef struct CCallInfo {
  _(ANY,	lj_tab_clear,		1,  FS, NIL, 0) \
  _(ANY,	lj_tab_newkey,		3,   S, PGC, CCI_L) \
  _(ANY,	lj_tab_len,		1,  FL, INT, 0) \
+  _(ANY,	lj_tab_len_hint,	2,  FL, INT, 0) \
  _(ANY,	lj_gc_step_jit,		2,  FS, NIL, CCI_L) \
  _(ANY,	lj_gc_barrieruv,	2,  FS, NIL, 0) \
  _(ANY,	lj_mem_newgco,		2,  FS, PGC, CCI_L) \