Re: VM/GC question for gurus.

On Wed, 18 Mar 2026 at 18:56, Roberto Ierusalimschy <[email protected]>
wrote:

> > > You may be right; we will check that. luaL_loadfilex creates a new
> > > string with the file name (calling 'lua_pushfstring'), and that call
> > > checks the collector. But lua_load does not do that check.
>
> If the chunk is text, the parser checks the collector, but with a binary
> chunk really there is no check. The following program shows the problem:
>
>     local s = "return 34"
>     s = string.dump(load(s))
>     for i = 1, 1e8 do load(s) end
>     io.write(collectgarbage"count" * 1024, "\n")
>

You beat me to it. I read lua_load, notice the undump() call and redid my
tests using the uncompiled chunk, it was 10 times slower but did not
exhibit the OOM problem.



> 'lua_pushstring' and its variations all check the GC, independently
> of interning. (That is why luaL_loadfile has no issues.)
>

OK, will add a commented pushstring then.

Thanks.
   Francisco Olarte.

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