[luatex] slow io.popen

[Herbert Voss]

On 26.01.2013 16:20, Stephan Hennig wrote:

>    $ time lua.exe test-pipe.lua googlebooks-ger-all-1gram-20090715-0.csv.zip
>    real    0m21.437s
>    user    0m0.015s
>    sys     0m0.015s
>
>    $ time texlua.exe test-pipe.lua
> googlebooks-ger-all-1gram-20090715-0.csv.zip
>    real    4m53.810s
>    user    0m0.015s
>    sys     0m0.015s
>
> texlua is more than 13 times slower than lua.  Is this a known issue?

voss at shania:~> time lua test-pipe.lua 
Download/googlebooks-ger-all-1gram-20090715-0.csv.zip
unzip -p Download/googlebooks-ger-all-1gram-20090715-0.csv.zip

real	0m10.488s
user	0m14.325s
sys	0m0.907s
voss at shania:~> time texlua test-pipe.lua 
Download/googlebooks-ger-all-1gram-20090715-0.csv.zip
unzip -p Download/googlebooks-ger-all-1gram-20090715-0.csv.zip

real	0m17.273s
user	0m22.695s
sys	0m0.899s


voss at shania:~> texlua -v
This is LuaTeX, Version beta-0.70.2-2012052410 (TeX Live 2012)


Herbert