[erlang-questions] os:cmd/1 performance issue

Wes James <>
Tue Nov 26 23:56:47 CET 2013


On Tue, Nov 26, 2013 at 2:18 PM, Marouene Lakhdhar <
> wrote:

> Hi,
>
> I'm facing a performance issue with os:cmd/1. it takes about 5 secs to
> return the result however if i execute the commande with cmd.exe, the
> reuslt will be immediately displayed.
>
> I'm using erl5.10.3 under windows 7.
>
> Could you please help me how to avoid the extra time  when usung os:cmd/1?
>
> Thanks,
> Marouene.
>
>
I just brought up a machine with ESysMan, coped over an any.cmd with "echo
hello>hello.txt"  and executed the any.cmd file and it created a file
hello.txt pretty much right after I executed it.

I do it like this:

https://github.com/comptekki/esysman/blob/master/src/ecom.erl

Just a simple call to os:cmd(...)

I also put

C:\Program Files\erl5.9.3.1\erts-5.9.3.1\bin

at beginning of the System Variables, Path variable.  It's hard to tell why
yours is slow with no context of how you are using it.

-wes
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