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- Subject: Re: Slow performance in Lua at Ubuntu
- From: Sean Conner <sean@...>
- Date: Mon, 14 Oct 2013 17:21:59 -0400
It was thus said that the Great Toninho once stated:
> Hi guys,
> I've been using a system with Ubuntu 12.04 LTS and 4GB. Lua 5.2 was installed from official Ubuntu repository.
> My application is portable for Windows, Linux (Ubuntu) and Mac.
> This program retrieves many information from script and build some objects in C++ and
> create an image. A performance test performed on Windows and on Ubuntu had the follow
> results (only Lua):
> Ubuntu Windows
> 582.449 ms 210.224 ms
> This mail also includes a spreadsheet file with all results of test that can be load from
> this link: https://www.dropbox.com/s/qgh77cx014ra812/Results.xls.
> Anyone knows or have an idea that could help me?
I had this problem ten years ago under Linux, where a library was compiled
so poorly, that a shell script could beat a C program:
In your case, I would say that Lua under Ubuntu was compiled with
absolutely no optimizations.
> Is there a way to compile Lua with a maximum of speed and totally for 64 bits?
You could try downloading the source code for Lua:
and installing it from there. At first, I would try a default compile and
if that doesn't improve the speed, then try adding optimizations.