[Buildroot] Python running very slow with buildroot 2012.05

[Vimal Menon]

Dear Thomas,

I checked using default installations in both the environments, can the difference between glibc and uClibc be so huge for python?


Thanks,
Vimal

 


________________________________
 From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
To: Vimal Menon <vimalmenon at yahoo.com> 
Cc: "buildroot at busybox.net" <buildroot at busybox.net> 
Sent: Thursday, September 6, 2012 7:45 PM
Subject: Re: [Buildroot] Python running very slow with buildroot 2012.05
 
Le Thu, 6 Sep 2012 07:04:01 -0700 (PDT),
Vimal Menon <vimalmenon at yahoo.com> a écrit :

> I happened to download and install buildroot (default 2012.05), while
> checking the compiled image, I saw that python runs very slow. for eg:
> 
> On a standard linux, Python 2.7.2 complied with glibc
> 
> #time python -c "print 'hello world'" 
> 
> hello world
> 
> real    0m0.077s
> user    0m0.068s
> sys     0m0.009s
> 
> and the same command ran on the same machine with the buildroot
> compiled image (not via qemu, but with the image booted through
> grub), python takes a lot more time
> 
> #time python -c "print 'hello world'" 
> 
> hello world
> real    0m 0.28s
> user    0m 0.26s
> sys     0m 0.01s
> 
> Why would there be such a huge difference? What might I have done
> wrong? Has anybody of you come across such a situation?

You're not running the C library (by default, Buildroot uses uClibc),
and maybe you're not using the same optimization flags as well.

Try to build a Buildroot system based on glibc, and use the appropriate
optimization flags, maybe it will improve the situation.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.busybox.net/pipermail/buildroot/attachments/20120906/2d0b73cc/attachment.html>