Shell script loop runs out of memory

[Adam Dinwoodie]

Buchbinder, Barry wrote:
> You might try changing
>     [[ condition ]]
> to
>     [ condition ]
> Perhaps single brackets use memory differently than double brackets.

They do: [[ condition ]] is interpreted by the shell; [ condition ] forks to
call /usr/bin/[.exe. If forking is the problem, that'll make it worse.

> If that doesn't work, try changing
>     #!/bin/sh
> (which calls bash) to
>     #!/bin/dash
> You will have to have retained the double to single bracket change,
> because dash does not have double brackets.  Perhaps dash is more
> efficient with memory than bash.

There's a whole bunch of other alternatives: ksh, zsh, ash, etc. If the
problem is forking, however, none of those are going to improve things.

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