Re: Lua has reached a local optimum

[Jakub Jirutka <jakub@...>]

> I can confirm that the use of generational GC with tcmalloc.so improves
> the performance (less CPU time and memory usage) of complex programs
> (douzens GB of RAM) considerable.

Who develops programs consuming dozens GiB of RAM in Lua?! O.O
I don't have any objections against generational GC in Lua, but arguing
with dozens GiB of RAM looks more like discussion about Java VM than Lua...

Jakub

On 05/07/18 12:13, Rodrigo Azevedo wrote:
> 
> 
> 2018-07-05 0:55 GMT-03:00 云风 Cloud Wu <cloudwu@gmail.com
> <mailto:cloudwu@gmail.com>>:
> 
> 
> 
>     Dibyendu Majumdar <mobile@majumdar.org.uk
>     <mailto:mobile@majumdar.org.uk>>于2018年7月5日周四 上午5:44写道：
> 
>         I think 5.3 may well be the greatest of Lua 5.x releases as I can't
>         think of anything in 5.4 that was really necessary. Did people
>         really
>         need a generational GC? Is the additional complexity worth it?
>         Did Lua
> 
> 
>     A user of our online game server framework (skynet) report lua
>     5.4's  generational GC could improve the memory usage obviously [1].
>     It reduce nearly half physical memory usage, because the allocator
>     (sush as jemalloc) would use much more memory if we haven't collect
>     it as soon as possible.
> 
>     [1] : https://github.com/cloudwu/skynet/issues/827
>     <https://github.com/cloudwu/skynet/issues/827>  (The discussion is
>     in Chinese)
> 
> 
> I can confirm that the use of generational GC with tcmalloc.so improves
> the performance (less CPU time and memory usage) of complex programs
> (douzens GB of RAM) considerable. Moreover, the new random number
> generator algorithm and the new opcodes of lua 5.4 are absolutelly
> essential, sorry Dibyendu.
> 
> -- 
> Rodrigo Azevedo Moreira da Silva