Re: Suggest adding a "nopause" option to collectgarbage()

[云风 Cloud Wu <cloudwu@...>]

张伟智 <robotkzhang@gmail.com>于2016年9月27日周二 下午5:02写道：

The while loop  call singlestep() until debt decrease to -GCSTEPSIZE.
When the g->GCDebt is big, singlestep() will be called for many many times,

I suggest patch the setpause() (lua 5.3.3):

diff --git a/src/lgc.c b/src/lgc.c

index 7c29fb0..df26798 100644

--- a/src/lgc.c

+++ b/src/lgc.c

@@ -942,6 +942,8 @@ static void setpause (global_State *g) {

             ? estimate * g->gcpause  /* no overflow */

             : MAX_LMEM;  /* overflow; truncate to maximum */

   debt = gettotalbytes(g) - threshold;

+  if (debt > 0)

+    debt = 0;

   luaE_setdebt(g, debt);

 }

A large positive debt number would stop the world, I think we should avoid it.