Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > gnu.bash.bug > #14487

Re: Unexpected delay in using arguments.

Show key headers only | View raw

I followed along through the script:

>     m=20000
...
>     test1() { ...

Eventually I got to this line:

>       set -- $(seq $m)

At that line I see that bash must allocate enough memory to hold all
of the numbers from 1 through 20000 in memory all at one time.  That
is very inefficient.  That is at least 100K of memory.

  $ seq 20000 | wc -c
  108894

Of course I assume this is only a proxy simpler reproducer for the
actual problem program but just the same it is almost always possible
to refactor a program into a different algorithm that avoids the need
to enumerate so many arguments in memory.  I suggest refactoring the
program to avoid the need for this memory stress.

Bob

Back to gnu.bash.bug | Previous | Next | Find similar | Unroll thread

Thread

Re: Unexpected delay in using arguments. Bob Proulx <bob@proulx.com> - 2018-08-14 15:50 -0600

csiph-web