Based on the discussion in 'coreutils / moreutils - DC a directory counter' I have optimized sbase ls to easily handle large directories. The major change is that ls no longer calls 'lstat' on files if it does not have to.
This patch also add '-U' which keeps the list from being sorted. When using '-U', ls is constant (except for an argv duplicate) memory.
sbase-optimize-ls.diff
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