Re: [ANN] Lua 5.3.0 (rc3) now available

[Philipp Janda <siffiejoe@...>]

Am 05.01.2015 um 01:08 schröbte Lorenzo Donati:
> I find this release quite slow. I ran a bunch of test suites used to
> unit-test my internal "patchwork" library and it took about 3 minutes to
> complete, whereas with Lua 5.2 and 5.1 it took a couple of seconds
> (some of those are stress-tests for my non-optimized math modules, so
> they probably generate lots of garbage, but the difference from previous
> versions is scaring).  [...]
>
> BTW, during the test-run ProcessExplorer (a task manager) showed that
> the core on which lua ran was fully busy (on both systems), so it seems
> that Lua was doing something heavy and not waiting for some lagging I/O.
>
> Can anyone confirm such behaviour? Did anyone do some performance
> testing on Windows with 5.3 compared with older versions?

In work2 there had been a problem with the garbage collection which 
caused a slowdown[1]. Could you retest your code with a stopped garbage 
collector (maybe forcing a full collection manually at certain intervals 
if necessary)?

> Thanks!
>
> -- Lorenzo

Philipp

  [1]: http://lua-users.org/lists/lua-l/2014-03/msg00724.html